Vasoconstriction
a. refers to a decrease in the radius of a vessel.
b. of an arteriole decreases blood flow through that vessel.
c. of an arteriole is controlled by the parasympathetic system
d. both (a) and (b) above.
e. all of these answers.
D
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A tropic hormone prevents endocrine glands from releasing their hormones, thereby maintaining homeostasis.
Answer the following statement true (T) or false (F)
Arteriosclerosis is characterized by
A. a thickening of the tunica adventitia. B. increased elasticity of the tunica media. C. decreased resistance to blood flow. D. an enlargement of the lumen of the vessel. E. thickening of the tunica intima and loss of elasticity in the tunica media.
Which cells form myelin in the spinal cord?
A) Microglia B) Oligodendrocytes C) Schwann cells D) Satellite cells E) Astrocytes
The region of the ampulla that contains the receptors for rotational (dynamic) equilibrium are called
A) utricles. B) ampullary crests. C) saccules. D) fovea. E) maculae.