Which of the following is a normal response to excessive loss of body heat in a cold environment?
A. Sweat glands become active.
B. Dermal blood vessels constrict.
C. Smooth muscles relax.
D. Dermal blood vessels dilate.
Answer: B
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Which of the following statements about taste is FALSE?
A) K+ conveys salty. B) H+ conveys sour. C) Sugars convey sweet. D) Amino acids convey umami.
The blood vessels in the alimentary canal that nourish the epithelium and absorb digested nutrients lie in the ________
A) lamina propria B) muscularis mucosae C) serosa D) adventitia
The discipline known as ________ anatomy examines similarities and differences across species.
Fill in the blank(s) with the appropriate word(s).
The diagram illustrates sensory nerve endings in the skin. What structure does "A" represent?
A. Meissner corpuscles B. free nerve endings C. Ruffini end organ D. Pacinian corpuscle E. Merkel disks