All fibers of the trapezius muscle are innervated by the __________.
A. scapular nerve
B. spinal accessory nerve
C. axillary nerve
D. coxal nerve
Answer: B. spinal accessory nerve
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Which of the light micrographs in the figure below shows the type of epithelial tissue whose functions include filtration, diffusion, osmosis, and secretion in serous membranes?
a) A b) B c) C d) D e) E
A membrane attack complex is a protein grouping that
A. triggers phagocytosis of a target cell by a nearby macrophage or neutrophil. B. forms a channel in the target cell membrane that causes cytolysis. C. links a pathogen to a red blood cell so that it is carried to the liver or spleen. D. stimulates basophils to attack a multicellular parasite in the body.
An action potential in a presynaptic neuron induces opening of voltage-gated ____________________ channels in the synaptic knob, which triggers exocytosis of synaptic vesicles
Fill in the blank(s) with correct word
What substance is administered during an asthmatic attack to decrease resistance by dilating the airways?
a. angiotensin b. histamine c. epinephrine d. norepinephrine