Explain the role of vasodilation and vasoconstriction in thermoregulation
What will be an ideal response?
In response to high body temperature, inhibition of the vasomotor center causes vasodilation of peripheral vessels, and warm blood flows to the surface of the body. Skin temperatures rise and radiational and convective losses increase, thereby reducing body temperature. Conversely, in response to low body temperature, the vasomotor center decreases blood flow to the dermis, the skin cools, thereby reducing losses by radiation and convection.
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The olecranon fossa
A. forms the elbow joint. B. accommodates the proximal ulna. C. is a depression on the posterior distal humerus. D. All of the above
Select the structure that houses hair cells
a. basilar membrane. b. endolymph. c. oval window. d. organ of Corti. e. tectorial membrane.
Which type of immunoglobulins account for 70% to 75% of antibodies in normal serum?
a. IgA b. IgD c. IgE d. IgG
The corpus cavernosum, a mass of tissue rich in venous channels, is present in the:
a. Epididymis b. Penis c. Prostate gland d. Rete testis e. Vas deferens