Which muscle is responsible for the thumbs up motion?
A. Extensor digiti minimi
B. Abductor pollicis longus
C. Extensor pollicis longus
D. Extensor digitorum
Ans: C. Extensor pollicis longus
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Answer the following statement true (T) or false (F)
The anterior surface of the scapula is smooth and concave. The name of the concave depression is the
A) supraspinous fossa. B) infraspinous fossa. C) subscapular fossa. D) subspinous fossa. E) glenoid fossa.
Certain odors can initiate behavioral and emotional reactions because
A. the olfactory pathway is connected directly to the medulla oblongata. B. there are widespread olfactory associations within the hypothalamus and limbic system. C. olfactory sensations are interpreted at the prefrontal cortex. D. the olfactory pathway is connected directly to the occipital lobe. E. the sense of olfaction occurs immediately at the olfactory epithelium.
A decrease in the autonomic tone of the smooth muscle in blood vessels would result in
a) A decrease in vessel diameter. b) A decrease in blood flow through the vessel. c) No change in vessel diameter. d) Increased frequency of muscle contractions. e) An increase in vessel diameter.