Selective precipitation of a protein from a crude extract is most effective by ammonia sulfate.
Selective precipitation :A method of separating ions in an aqueous solution known as selective precipitation involves using a reagent that precipitates one or more of the ions while leaving the rest in solution. Metallic element qualitative analysis.
What is selective precipitation used for?Protein selective precipitation can be used to recover the majority of the proteins from a crude lysate in bulk form, to separate a group of proteins from a protein solution selectively, or to recover a particular protein of interest from a purification step extremely precisely.
What is precipitation method of separation?Precipitation is a method for separating a mixture according to how easily its constituent parts can be dissolved. A compound's solubility is influenced by the temperature, pH, and ionic strength of the solution. A chemical may become an insoluble solid and leave solution if certain parameters are changed.
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Metal blocks A and B both have the same mass. It requires 50 J to heat block A from 20°C to 45°C, whereas it requires 80 J to heat block B from 20°C to 45°C. Which has a greater specific heat?
Answer: Block B
Explanation: If it takes more Joules of energy to heat block B from one same temperature to another, and both blocks are the same mass, then block B has a higher specific heat
All of the following statements regarding the electrical activity of the heart conduction cell are false except?
During repolarization, calcium channels close and voltage-gated potassium channels open is the correct answer.
Repolarization is the change in membrane potential that occurs immediately following the depolarization phase of an action potential, which changes the membrane potential to a positive value, and restores it to a negative one. The membrane potential typically recovers to the resting membrane potential during the repolarization phase. Action potentials enter the falling phase as a result of the outflow of potassium (K+) ions. The K+ channel pore's selectivity filter allows the ions to flow through. The open calcium channels pass more calcium ions when the driving force for calcium entry increases during the repolarization of the AP, which causes an increase in calcium influx.
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The complete question is :
All of the following statements regarding the electrical activity of the heart conduction cell are false except?
A : A plateau is prolonged to ensure repolarization.
B : Depolarization of the nodal cells is due to fast voltage-gated calcium channels.
C : The first event is the result of slow voltage-gated sodium channel changing the resting membrane potential to -40 mV.
D : During repolarization, calcium channels close and voltage-gated potassium channels open.
An example of a(n) ______ cross is the mating of two rats that both contain the alleles ff for fur color. this cross is made to examine which of two fur colors their offspring will have.
An example of a monohybrid cross is the mating of two rats that both contain the alleles ff for fur color.
What is a monohybrid cross?A monohybrid cross is a hybrid cross between two species that only have a difference of one gene.
In other words, a monohybrid cross is the hybrid of two individuals with homozygous genotypes which result in the opposite phenotype for a certain genetic trait.
According to this question, two rats that both contain the alleles ff for fur color are crossed. This shows that only one gene is involved, hence, cross involving only one gene is called monohybrid.
Note that, this is opposed to a dihybrid cross that involves two different gene locus.
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Viewing the shape of a bacterial or archaeal cell using a microscope gives a great deal of information about the metabolism and lifestyle of the organism. question 11 options:
a. true
b. false
The statement is false that viewing the shape of a bacterial or archaeal cell using a microscope gives a great deal of information about the metabolism and lifestyle of the organism.
Archaeal cell is the prokaryotic unicellular organism, that live in extreme habitats. These habitats can be thermal hot springs, extreme salty waterbodies or in areas producing methane gas. This is the reason they are also called extremophiles. Examples are: methanogens, halophiles, etc.
Metabolism refers to all the chemical reactions that take place inside an organism's body. Metabolism is made up of two phenomena: anabolism and catabolism. Anabolism is the formation of larger molecules from smaller ones, while catabolism is the breakdown of larger molecules into smaller ones.
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When a gardener crosses a plant with red flowers with a plant with yellow flowers, orange-flowered offspring result. what mode of inheritance is exemplified by these flowers?
Incomplete dominance mode of inheritance is exemplified by these flowers.
Incomplete Dominance- When both alleles of a gene are only partially expressed at a locus, a phenomenon known as incomplete dominance occurs, which frequently produces an intermediate or distinct phenotype. As partial domination, it is also known. For instance, the red allele is dominant over the white allele in roses.
Phenotype- An observable characteristic is simply referred to as a "phenotype." Pheno, which has the same origin as the term "phenomenon," simply means "observe." It may therefore refer to anything from a common attribute, like height or hair color, to the presence or absence of a disease. It is also an observable kind of an organism.
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which of the following is NOT a characteristic that a living thing must follow
-A. Order
-B. Reproduction
-C. Growth & Development
-D. Energy processing
-E. Be related to at least 2 other species
-F. Responds to the environment
-G. Regulation
-H. Evolutionary adaptation
Growth & Development is the not a characteristic that a living thing must follow
Different characteristics of growth and development like intelligence, aptitudes, the body structure, the height, weight, color of the hair and eyes are highly influenced by the heredity. Sex: Sex is a very important factor which actually influences the human growth and the development It can help them learn new skills, to grow their career, and to improve their mental health. Human growth and the development are the important because it also helps them to learn new skills, improve their quality of life, and also improve their mental health. Human growth and the development are important in the continuity of the species.
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left ventricular hypertrophy normal, concentric remodeling, eccentric hypertrophy, and concentric hypertrophy.
Left ventricular hypertrophy is an increase in left ventricular myocardial mass that is mainly caused by the increased work on the heart. It can be caused by anxiety disorder that increase plasma level.
There is two types of hypertrophy that is eccentric and concentric where the concentric hypertrophy is related to the increased in wall thickness left ventricular and eccentric is related to the dilatation of the left ventricular.
It increase the risk of serious health issues in heart. It have no symptoms and the life of the patient is nearly normal. Angiotensin converting enzymes (ACE) are the inhibitor of left ventricular hypertrophy.
Inhibitor is a substance that slows down or stop the chemical reaction or reduce the activity of chemical reactant and catalysts.
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Evolution of shorter legs in anole lizards placed on small, hurricane-scrubbed islands is an example of which type of evolution?.
This type of evolution is known as Microevolution.
What is the meaning of evolution?Evolution is the descent modification of preexisting species. It is a process species adapt over time. There are two types of evolution: Microevolution and macroevolution.
Microevolution is defined as the changes in the frequency of the gene in the population. Several factors affect evolution geneflow, including natural selection, mutation, and genetic drift.
Pesticide resistance is one example of macroevolution. Microevolution is frequently seen in visible forms of evolution, such as antibiotic-resistant variable strains. Microevolution is the change in gene frequency that occur over time. Alleles are different forms of a gene. Allele frequencies are usually represented as a percentage.
This type of evolution is known as Microevolution.
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Which three of the following entities are acellular?.
a) prions archaea
b) viroids bacteria
c) viruses protists
d) fungi
Answer:
Prions archea, viroids bacteria, viruses protists are acellular while fungi is cellular.
While viruses have indeed been closely researched for more than a century for infections of people and animals, most viruses, particularly those that infect microorganisms, are still poorly understood.
Pathogenic RNA molecules are known as viroids. Contagious protein particles are identified as prions. Viruses are larger than that of viroids. Viroids are larger than prions in size.
Molds, wild yeasts, as well as mushrooms are examples of fungi. Numerous fungi are multicellular and also have nuclei in their cells. A protein-encased DNA or RNA core defines viruses being non - cellular organisms. Some scientists disagree with the notion that viruses are living things.
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When organisms leave the group they were born into and join another group, this can alter allele frequencies in the new group. What mechanism is this?.
The answer to the question is gene flow.
What is gene flow?Gene flow, sometimes referred to as gene migration, geneflow, and allele flow in population genetics, is the exchange of genetic material between populations. A population can be deemed to be a single effective population if two populations have equal allele frequencies and the rate of gene flow is high enough. It has been demonstrated that all it takes is "one migrant each generation" to stop populations from drifting apart. Depending on how severe the selection pressure is, populations can diverge even when they are exchanging alleles. The exchange of genetic variety between populations is facilitated through gene flow. By altering allele frequencies, migrants affect how genetic variation is distributed among populations.
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After suffering a stroke, lulu finds she cannot move her left leg. this would suggest that the stroke damage is in the area of the:_______
After suffering a stroke, lulu finds she cannot move her left leg. this would suggest that the stroke damage is in the area of the Left Frontal Lobe.
What is Frontal Lobe?The frontal lobe is the largest of the four primary lobes of the brain in animals, and it is placed at the front of each cerebral hemisphere (in front of the parietal lobe and the temporal lobe). It is divided from the parietal lobe by a groove between tissues known as the central sulcus and from the temporal lobe by a deeper groove known as the lateral sulcus (Sylvian fissure). The frontal pole, one of the three poles of the cerebrum, is the most anterior rounded section of the frontal lobe (albeit it is not well-defined) .
The management of higher level executive functions as well as voluntary movement and expressive language depend on the frontal lobes. Executive functions are a group of cognitive abilities that include the ability to organise, plan, take the initiative, self-regulate, and control one's actions in order to accomplish a task.
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What were the three key observations made by darwin that allowed him to deduce that natural selection is a primary driver of evolution?.
The three point which deduce that natural selection is a primary driver of evolution are:
More offspring are produced than survive by organisms.Population members differ from one another, andThe relative frequency of advantageous variants rises with time.Natural Selection- An evolutionary mechanism is natural selection. Environment-adapted organisms have a higher chance of surviving and dispersing the genes that contributed to their success. Over time, this mechanism leads to the evolution and divergence of species.
Genes- The fundamental genetic component transferred from parent to child. Genes are composed of DNA sequences and are organized sequentially at specified sites on chromosomes in the cell nucleus.
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Approximately how long should it take for blood that was collected in a non-additive plain red top tube to clot?
30 to 60 minutes
Approximately it takes 30 to 60 minutes for blood that was collected in a non-additive plain red top tube to clot.
How soon after blood collection should it be examined?Most of the time, a wet blood sample should be tested in the lab within eight hours after the blood collection event if it is stored at room temperature. The sample is normally kept in cold storage at +2°C to +8°C for a maximum of seven days if testing cannot be finished within that eight-hour window.Is it necessary to spin blood right away?Blood should be examined as soon as possible after being drawn, typically within four hours. Within two hours following the blood draw, the whole blood and serum samples should be separated. Depending on the testing requirements, additives like a clot accelerator, an anticoagulant, or heparin may be utilized.To learn more about blood clot visit:
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One of the criticisms of selye's general adaptation syndrome concerns the fact that ________ produce the same biological responses.
Selye's general adaption syndrome has been criticized in part because not all stressors result in the same biological reactions.
How to define a syndrome?An accumulation of signs or symptoms that point to the existence of one particular illness or a higher risk of contracting it.
What kind of syndromes are examples?As a result, there are many different conditions that exist today, including Down syndrome, AIDS, Asperger's, carpal tunnel syndrome, chronic fatigue syndrome, Tourette's syndrome, sick building syndrome, and many more.
Down syndrome variations:Trisomy 21 affects approximately 95% of individuals with Down syndrome.About 3% of those with Down syndrome have translocations, which is a rather uncommon kind.About 2% of individuals with Down syndrome have mosaic Down syndrome.To know more about Syndrome visit:
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What type of bonds occur in tertiary and quaternary structures to cause a ""globular"" look?.
The types of bonds that occur in tertiary and quaternary structures to cause a ""globular"" look are: non-covalent bonds and one covalent bond which is disulfide bond.
The quaternary structure of the protein is formed when two or more subunits are joined together. These subunits individually have their own primary, secondary and tertiary structures. The example of protein exhibiting a quaternary structure is hemoglobin.
Non-covalent bonds are those that occur only between the molecules and not between the atoms of a molecule. There are various types of non-covalent bonds. These are: hydrogen bonds, ionic bonds, Van der Waals forces, etc.
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When compared to other foods, fats have the most calories per gram. for energy to be harvested, the long carbon chains are broken into many two-carbon _______ molecules that enter the krebs cycle.
When compared to other foods, fats have the most calories per gram. for energy to be harvested, the long carbon chains are broken into many two-carbon Acetyl-CoA molecules that enter the krebs cycle.
krebs cycle is a series of reactions which occurs with the oxidation of acetyl-CoA which releases the energy to be stored for the undergoing the various process of system. Acetyl-CoA is derived from carbohydrates, proteins and fats.
the long chain fats are broken down into many two carbon acetyl-CoA. It can also be derived from amino acids or glucose.
The acetyl-CoA then enters the kreb cycle to produce energy.
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In terms of fatalities, the most dangerous natural disasters are caused by ____.
In terms of fatalities, the most dangerous natural disasters are caused by long term weather patterns that causes droughts.
A drought is a prolonged period of unusually dry weather caused by a lack of rain. A lack of precipitation can cause a number of issues for local communities, such as crop damage and a lack of drinking water.
Drought and certain weather patterns have been linked by geologists. A weather pattern reveals where the temperature of the surface water in the Pacific Ocean rises along the central South American coast. Warmer waters influence storm patterns and are linked to droughts.
When the temperature of the Pacific Ocean's surface water along South America's coast falls. The cooler waters influence storm patterns by causing drier-than-normal conditions. As a result, climate/weather change increases the chances of drought worsening in many parts of the world.
How drought is impacted by climate change?
Warmer temperatures accelerate evaporation, which decreases surface water and dries out the soil and vegetation. Low precipitation periods become drier as a result, as opposed to when it is cooler. Affected areas are becoming drier as a result of climate change's timing changes for water availability.
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Why do temperatures
in the mesosphere decrease as altitude increases?
It is due to decreasing absorption of solar radiation by the rarefied atmosphere and increasing cooling by CO2 radiative emission.
What is mesosphere?Between 30 and 50 miles above the surface of the Earth, or 50 to 80 kilometers, is the mesosphere, a region of the upper atmosphere. The highest temperature in the stratosphere at which the mesosphere is regarded as existing is known as the stratopause, which separates the two areas.
What are the 5 layers of the atmosphere give its characteristics?The graphic below illustrates how the layers of the atmosphere can be separated based on temperature. The troposphere, stratosphere, mesosphere, and thermosphere are those layers. The exosphere is a different zone that starts roughly 500 km above the surface of the Earth.
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All living things require an outside source of materials and energy. the sum total of all chemical reactions that occur within a cell to provide these materials and energy is called?
All living things require an outside source of materials and energy. The sum total of all chemical reactions that occur within a cell to provide these materials and energy is called metabolism.
Energy is the ability to perform work. In an organism's body energy is required to perform each and every processes inside the body. In eukaryotic organisms this energy is derived by the mitochondria. In humans and various other species, the major source of energy is ATP.
Metabolism is the sum total of all the reactions taking place inside the body. These reactions can be anabolic or catabolic. The anabolic reaction involve the formation of larger molecules from the smaller ones. The catabolic reactions involve the breakdown of larger molecules into smaller ones.
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In pea plants, green color (G) is dominant to albino (g). If we cross two pea plants that are heterozygous for color, what would be the expected phenotype ratio of the offspring? Do the Punnett square and write the phenotypic ratio in the space below:
Explanation:
risky behavior and abuse
When two heterozygous plants are crossed, then the offspring will be of two different phenotypes, such as green and albino. Out of the four individuals, three will be green and one will be albino. The phenotypic ratio is 3:1.
What is a monohybrid cross?A monohybrid cross involves a single character or trait. Example: the colour of a pea plant. In the pea plant, green is dominant over albino. Green colour is represented by G. Albino colour is represented by g.
The homozygous green plant is represented by GG. The heterozygous green plant is represented by Gg . The homozygous albino plant is represented by gg .
When two heterozygous plants (Gg) are crossed, each parent will produce two types of gametes, such as G and g. There will be offspring of the GG, Gg and gg type. Both homozygous (GG) and heterozygous (Gg) plants will be green. The punnett square is explained below
Hence, there will be two different phenotypes, such as green and albino, from the cross of two heterozygous individuals. The phenotypic ratio is 3:1.
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Which molecule can function as a recognition signal for interactions between animal cells?
Glycolipids molecule can function as a recognition signal for interactions between animal cells.
Describe glycolipids:Lipids having a carbohydrate connected by a glyosidic bond are known as glycolipids. Their job is to keep the cell membrane stable and make it easier for cells to recognize one another, which is essential for the immune response and for the connections that allow cells to join together to form tissues.
What use do glycolipids function?Glycolipids are crucial parts of biological membranes that serve a wide range of purposes. They might function as receptors, be necessary for cell aggregation and dissociation, be in charge of particular cellular interaction, and be involved in signal transduction. This protein does not transport phospholipids; instead, it largely transports various glycosphingolipids and glycerol glycolipids between internal membranes.
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Peptic ulcer disease (pud) is most likely to affect which areas of the gastrointestinal (gi) lining?
Peptic ulcer disease (pud) is most likely to affect the mucosa lining of the stomach or duodenum.
Peptic ulcer disease refers to the occurrence of painful ulcers in the protective lining of the stomach of the duodenum. The stomach produces hydrochloric acid independently to digest the food. The mucosa is the protective lining of the stomach that protects it from the harm that may be caused by the HCl.
An excessive amount of HCl in the stomach or eating up of mucus lining by the bacteria can cause ulcers or sores in the stomach or duodenum. This is referred to as peptic ulcer disease. PUD can also be caused due to various other factors like genetic factors, consumption of alcohol, smoking, or excessive use of NSAIDs.
PUD primarily affects the mucosa lining of the stomach. Submucosa lining lies beneath the mucosa lining which can also get affected. Severe cases of PUD can also affect the Muscularis layer of the stomach.
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What specifically separates during mitosis?
a) homologous chromosomes
b) sister chromatids
c) the cytoplasm
d) the genome
The correct option is (b) Sister chromatids
Sister chromatids specifically separates during mitosis.
What is mitosis?
Chromosomes that have been duplicated are divided into two new nuclei during the cell cycle phase known as mitosis. With a fixed number of chromosomes, genetically identical cells are produced during the cell division process known as mitosis. Thus, equational division is another name for mitosis. The mitotic process is broken down into stages that mark the end of one set of activity and the beginning of the next. Preprophase, prophase, prometaphase, metaphase, anaphase, and telophase are the stages that apply only to plant cells. Chromosomes that have already been duplicated condense and attach to spindle fibers during mitosis, which pulls one copy of each chromosome to each of the cell's two opposite sides. Two daughter nuclei with the same genetic makeup are the outcome.Learn more about the Mitosis with the help of the given link:
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Column A
1.
bacteriophage:
bacteriophage
2.
capsid:
capsid
3.
lysogenic infection:
lysogenic infection
4.
lytic infection:
lytic infection
5.
prophage:
prophage
6.
retrovirus:
retrovirus
Column B
a.the type of infection in which a virus does not immediately start replicating itself but inserts a piece of DNA ino the host cell's genome which becomes activated at a later date
b.a type of infection in which a virus immediately starts replicating in the host cell
c.a virus that, upon infection of a host cell, makes a DNA copy of its RNA and inserts that piece of DNA into the cell's genome
d.the protein coat that surrounds a virus
e.a piece of virus DNA that becomes a part of a bacterium's genome- until activated to produce new bacteriophages
f.a virus that infects bacteria
The biological process by which a bacteriophage infects a bacterium, fusing its DNA with that of the host to prevent the host from being wiped off. Thus option 1.f 2.d 3.a 4.b 5.c 6.d is correct.
What is property of bacteriophage?The nucleic acid can be single-stranded or double-stranded and can either be DNA or RNA. Phage comes in three different structural configurations: a filamentous form, an icosahedral (20-sided) head with a tail, and an icosahedral head without a tail.
Bacteriophage infection of a bacterium, followed by the generation of additional phage particles and the lysis, or dissolution, of the cell.
Bacteriophage enzymes break down the bacterial cell wall by hydrolyzing its protein and carbohydrate constituents from the outside as well as the inside.
Therefore, 1.f 2.d 3.a 4.b 5.c 6.d is correct according to given option about bacteriophage.
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Answer:
Bacteriophage: a virus that infects bacteria
capsid: the protein coat that surrounds a virus
lysogenic infection: .the type of infection in which a virus does not immediately start replicating itself but inserts a piece of DNA into the host cell's genome which becomes activated at a later date
lytic infection: a type of infection in which a virus immediately starts replicating in the host cell
prophage: a piece of virus DNA that becomes a part of a bacterium's genome- until activated to produce new bacteriophages
Retrovirus: a virus that, upon infection of a host cell, makes a DNA copy of its RNA and inserts that piece of DNA into the cell's genome
Explanation:
the introduction of fingerlings into the pond is called
A stocking
B clearing
C inoculation
D fertilisation
Answer:
Stocking
Explanation:
Will the velocity of the book change as it moves across the surface WITH friction? Explain your answer.
Answer:
yes
Explanation:
Friction slows things down. It causes a opposite force on the book causing the speed to slow and come to a stop.
ASAP What is temperature? What are the three temperature scales?
Temperature is a physical quantity that expresses the hotness of matter or radiation.
There are three types of temperature scale: those, such as the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, such as atom, molecule, or electron, in a body; those that rely solely on purely macroscopic properties and thermodynamic principles, such as Kelvin's original definition; and those that are not defined by theoretical principles, but are defined by convenient empirical properties of particular materials.
Three different scales are commonly used to measure temperature: Fahrenheit (expressed as °F), Celsius (°C), and Kelvin (K).
What do gymnosperms and angiosperms have in common?
a. seeds
b. flowers
c. spores
d. none of the other answer options are correct
Biologists identify and characterize climate in an area primarily by analyzing __________.
The average annual temperature, precipitation, and yearly variation in temperature and precipitation are the primary metrics used by biologists to identify and characterize climate in a region.
What is the precipitation process?Only when these will merge into larger drops through turbulence, in which water droplets clash and produce even larger droplets, is precipitation feasible. The droplets eventually descend, agglomerate, and grow heavy from resistance, and they finally fall as rain.
What causes precipitation?When cloud droplets or ice particles in the clouds develop and merge, they can no longer be supported by the updrafts (such as upward moving air) in the clouds and fall to the ground, forming precipitation.
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The process of engulfing particles (such as bacteria) by surrounding the particle and drawing it into the cell is referred to as?
The process of engulfing particles (such as bacteria) by surrounding the particle and drawing it into the cell is referred to as phagocytosis.
In the field of immunology, phagocytosis can be described as a process of endocytosis where foreign particles, such as bacteria, are engulfed. Phagocytosis is a part of the immune response that is generated by the body.
In order for a cell to engulf a particle, the cell membrane surrounds the foreign particles, various enzymes are then secreted onto the particle, and then it is engulfed. The process of phagocytosis helps in removing infectious agents and dead cells from the body.
Cells such as neutrophils and macrophages are referred to as professional phagocytes as they actively carry out the process of phagocytosis.
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