Which vessel type typically has an internal diameter of about 30 ?m and has a tunica media comprised of 1-2 layers of smooth muscle cells?
A) capillaries
B) muscular arteries
C) arterioles
D) venules
E) elastic arteries
C) arterioles
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Which of the following hormones is produced by the endocrine gland marked in the diagram?
a) testosterone b) glucagon c) melatonin d) thymopoietin e) vasopressin
The stretch reflex is an example of a ________ reflex because it maintains the body's upright position.
Fill in the blank(s) with the appropriate word(s).
Hypotension that is associated with neurogenic shock is the result of:
A) loss of alpha receptor stimulation. B) concomitant internal hemorrhage. C) increased peripheral vascular tone. D) profound peripheral vasoconstriction.
The figure illustrates a detailed drawing of the neuromuscular junction. What does "D" represent?
A. Postsynaptic membrane B. Synaptic cleft C. Synaptic vesicles D. Sarcolemma E. Presynaptic terminal