Which of the following muscle groups contract during forced expiration?
a. external intercostals
b. sternocleidomastoid
c. rectus abdominus
d. diaphragm
Answer: c. rectus abdominus
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A muscle that inserts on the body of the mandible is probably involved in
A) kissing. B) blowing. C) chewing. D) frowning. E) spitting.
Major regions of the large intestine include the
A) cecum, ileum, and duodenum. B) duodenum, ileum, and jejunum. C) cecum, colon, and duodenum. D) ascending colon, descending colon, and ileum. E) cecum, colon, and rectum.
Which of the following is FALSE regarding erection of the penis?
A. It is a spinal reflex. B. It is a result of sympathetic stimulation of vascular smooth muscle in the erectile tissue of the penis. C. It can be triggered by stimulation of tactile receptors in the penis. D. It is a result of arteriolar vasodilation and venous constriction of blood vessels in the penis. E. It can be inhibited by input to the autonomic nerves from higher brain centers.
The medial olfactory area
A. provides emotional reactions to odors. B. is the site of conscious perception of odors. C. generates action potentials in olfactory neurons. D. modulates the sense of olfaction within the olfactory bulb. E. is the area where chemicals bind to receptors.