When one walks into a cold room, exposed skin will experience
A. dermal vasodilation.
B. epidermal vasoconstriction.
C. dermal vasoconstriction.
D. increased sweat gland activity.
Answer: C
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During this fetal stage, lanugo covers the skin and the limbs near their final proportions.
A. Weeks 17?20 B. Weeks 13?16 C. Weeks 21?38 D. Weeks 1?8 E. Weeks 9?12
Ependymal cells line the internal, fluid filled cavities of the CNS
a. True b. False Indicate whether the statement is true or false
What characteristic is NOT descriptive of cardiac muscle tissue?
A) intercalated discs B) voluntary muscle contractions C) located in the heart D) striations
Which of the following properly describes "mean arterial pressure"?
A) Mean arterial pressure is generated by the closure of the aortic semilunar valve. B) Mean arterial pressure is generated as a result of the force exerted by the stretch and recoil of the arteries. C) Mean arterial pressure is generated as blood is ejected from the left ventricle. D) Mean arterial pressure ensures that blood is pushed from the heart and through the systemic circulation.