Which of the following is the best explanation of the benefit in the digestive system having the largest collection of lymphoid tissue (MALT) at the distal end of the small intestine?
A) The alkaline secretion of the small intestine aid in the growth of bacteria and must be controlled.
B) The body will actively excrete pathogens out the body, into the digestive system to be removed from the body in feces.
C) The huge numbers of bacteria living in the large intestine must be prevented from entering the lumen of the small intestine and being absorbed with food's nutrients into the blood stream.
D) The digestive systems first and foremost job is to digest and absorb nutrients so it puts off immunity for last.
C
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If one of your classmates comes down with mononucleosis, he will probably notice that his neck and axillary area are tender. A differential white count would reveal an unusually high level of one type of leukocyte
Which leukocyte proliferates and how does activation of this leukocyte change its appearance? How would this relate to the axillary tenderness? What will be an ideal response?
In passive immunity, the
A) immune system attacks normal body cells. B) body is deliberately exposed to an antigen. C) body receives antibodies produced by other humans. D) body receives antibodies produced by an animal. E) body receives antibodies produced by other humans or by an animal.
Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive
Indicate whether this statement is true or false.
The thymus gland produces a special type of leukocyte called
A. monocyte. B. eosinophil. C. B lymphocyte. D. T lymphocyte.