The ________ and ________ valves of the heart have no chordae tendineae attached.
Fill in the blank(s) with the appropriate word(s).
aortic; pulmonary
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Which is/are the most common inhibitory neurotransmitter(s) of the CNS?
A) GABA and glycine B) GABA only C) glycine only D) glutamate only E) All of the answers are correct.
Substances that cause an exaggerated immune response are called __________.
Fill in the blank(s) with the appropriate word(s).
When fluid moves across capillary membranes, the pressures forcing fluid out of the capillaries are:
hydrostatic pressure; interstitial osmotic pressure interstitial osmotic pressure; osmotic pressure of plasma interstitial fluid pressure; osmotic pressure of plasma hydrostatic pressure; interstitial fluid pressure none of the choices are correct
Which of the following might occur after a helper T cell is presented with a processed antigen and costimulated?
A. Helper T cells destroy the presenting cell. B. Helper T cells produce antibodies. C. Helper T cells release interleukins that stimulate B cells to clone. D. Helper T cells stop division. E. Helper T cells lyse.