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To tell in a simple sentence as because they don't come in contact with their blood,and it is the same reason why sperm itself foreign to the male's body doesn't get destroyed just because the blood testis barrier prevents entry of blood as a result keep them away from antibody mediated destruction.
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A cadaver tendon will be used to surgically repair one of my tendons. Is this the same as a heart transplant, where you then have to take pills to stop your body from rejecting the foreign tissue?
What you are talking about is an allograft (Greek allos = "other") from another individual. Before you receive the cadaver tissue as a graft, it will have been subjected to...
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Is phagocytosis the general name for the engulfing of a foreign body? Does that mean both monocytes and phagocytes can perform phagocyosis?
Phagocytosis is the term used for the engulfing of a foreign body by a cell of the immune system. There are different cells that can perform phagocytosis such as monocytes,...
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What is the difference between an epitope and an antigen? Does an antibody bind onto the epitope or the antigen?
An epitope (also known as the antigenic determinant) is that part of the antigen to which antibodies bind. While the antigen evokes the antibody response in the host, the antibody...
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Is bacteria an antigen? If not, what is the difference between bacteria and an antigen?
Bacteria is simply a prokaryote ( Kingdom Monera ). Antigens are usually proteins or polysaccharides which are present on the surface of cells of bacteria etc. Or we can also...
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In order for a lymphocyte to respond to an antigen, must the antigen be phagocytized by the lymphocyte? Must the antigen enter the cytoplasm of the lymphocyte?
Well, this is called immunological response. There are several factors that are involved in this process. If we speak about the infection caused by bacteria on a place where...
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If a gland is the combination of tissues that excretes something, then why is the liver considered as an organ, even though it excretes bile?
The organ called the liver is a gland. It has many functions, but one is secreting bile for helping digest fats in the small intestine. The definition of an organ...
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Why is the lithosphere rigid and the asthenosphere plastic, even though they are both part of the mantle?
You can pull warm taffy easily, whereas cold taffy is hard to pull and likely to break if you try. So it is with the rock in the upper mantle,...
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Why can't the essential amino acids be produced in the body even though they are coded by the DNA?
Amino Acids are NOT coded for in our DNA: They are used as building blocks for the synthesised protein during Translation. The human body CAN synthesise some amino acids from...
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What is the probability that the first son of a woman whose brother is affected will be affected? What is the probability that the second son of a woman whose brother is affected will be affected if her first son was affected?
If a woman's brother has DMD then the woman's mother is a carrier of the gene. The woman will get half of her chromosomes from her mother; so there is...
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Why are horses and donkeys considered different species, even though they can produce offspring?
Donkeys and horses can have a mule together, but the mile is unable to have offspring of its own. That is why horses and donkeys are considered to be different...
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