Human A&P Which of the following is TRUE of B cells? Activated B cells undergo c
ID: 177482 • Letter: H
Question
Human A&P Which of the following is TRUE of B cells? Activated B cells undergo clonal selection to produce plasma cells and memory B cells. B cells do not have antigen receptors on their plasma membrane. The main function of B cells is to secrete interleukin-2 a and b What do Memory B cells, Memory CD8 T cells, and Memory CD4 T cells have in common? They are long-lived and persist in the body long after a primary immune response is over. They attack and kill microbial invaders during the primary immune response. They are produced and mature inside red bone marrow. a and b a, b, and c Which of the following most accurately describes the difference between a primary immune response and a secondary immune response? A primary response involves antibody-mediated immunity; a secondary response involves cell-mediated immunity. A primary response involves cell-mediated immunity; a secondary response involves antibody-mediated immunity. A primary response occurs when an exogenous antigen has been detected; a secondary response occurs when an endogenous antigen has been detected. A primary response occurs when a particular antigen is first detected, a secondary response occurs when that same antigen is detected again, weeks or years later. A primary response eliminates microbial invaders prior to the onset of any symptoms (e.g., fever, nausea); a secondary response eliminates microbial invaders after symptoms have appeared. Which of the following best describes a water-soluble hormone? It is manufactured by a neurosecretory cell In the blood, most molecules of the hormone are bound to transport proteins. When it leaves the blood, the hormone binds to receptors located either in the cytosol or in the nucleus of a target cell. The hormone travels in the blood in the "free" form and binds to receptors located on the extracellular surface of the plasma membrane of a target cell. In the blood, most molecules of the hormone are bound to transport proteins. When it leaves the blood, it binds to receptors located on the extracellular surface of the plasma membrane of a target cell. Which of the following is true of a paracrine substance? A paracrine substance diffuses into the blood, travels to a distant tissue, diffuses out of the blood, and binds to receptors on target cells. Once secreted, a paracrine substance diffuses through interstitial fluid and binds to receptors on a neighboring cell. Once secreted, a paracrine substance diffuses through interstitial fluid and binds to receptors on the same cell that secreted the substance to begin with. A paracrine substance diffuses into the blood, travels a relatively short distance, diffuses out of the blood, and binds to receptors located on cells of a nearby tissue. None of these statements are true.Explanation / Answer
1.Ans.e. A and B
once activated B cells undergo clonal selection where they produce plasma cells and memory cells. the primary function of B-Cell is to make antibodies against antigen.Plasma cells involves in removal of antigen from the body. and memory cells are stay in the body, if the same antigen encounters again then these memory cells will recognize the antigen triggers the immune response. these cells are differentiated int plasma cells and memory cells and again plasma cells are involve in removal of antigen from body. these memory cells play a major role in secondary immune response.
2.Ans.A. they are long-lived and persists in the body long after a primary immune response is over.
Primary immune response is the first exposure to a specific antigen results differentiation immune cells into plasma cells and memory cells. plasma cells involves in removal of antigen from the body. but in the secondary immune response if the same antigen reappears in the body these memory cells actively participated and removes antigen from body. the antibody level remains high for longer periods.
3.Ans.D. A Primary response occur when particular antigen is first detected and secondary response occurs when that same antigen is detected again, weeks or years later
Primary immune response occurs as a results during primary contact with an antigen. if the same antigen reappears in the body then the activated immune response called secondary immune response.Plama cells play role in elimination of antigen in the Primary immune response, in the secondary immune response memory cells play major role.
4.Ans.C the Hormone travels in the blood in FREE form and binds to the receptors present on the extracellular surface of plasma membrane of the target cell.
water soluble hormone do not need any kind of transport proteins to travel in the blood. they travel in FREE form through blood. but Lipid soluble Hormones needs kind of transport proteins to travel. the water soluble Hormones travels through blood and binds on the surface receptors which is present on the extracellular surface of the target cells.
5.Ans.D.paracrine substance diffuse into the blood travels relatively short distance diffuse out of the blood and binds to receptors located on cells of a nearby tissues.
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