Sympathetic stimulation of the terminal bronchioles causes
A) secretion of less surfactant.
B) an increase in blood supply to these areas.
C) bronchodilation.
D) bronchoconstriction.
E) no changes; there is no parasympathetic innervation of these structures.
C) bronchodilation.
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A person has a 50 percent blockage of one coronary artery but has a good prognosis because of vessel anastomoses. What did this person do to create these anastomoses?
A) Controlled elevated blood glucose B) Atea high-fat diet C) Exercised D) Maintained a sedentary lifestyle
Factors that are necessary for proper bone formation include all of the following, except
A) vitamin A. B) vitamin E. C) vitamin C. D) the hormone thyroxine. E) vitamin D.
Which of the following is a progressive, degenerative disorder that affects upper and lower motor neurons causing skeletal muscle atrophy?
A) cerebral palsy B) stroke C) paralysis D) amyotrophic lateral sclerosis E) multiple sclerosis
All of the following are true of the centrioles, except
A. they are located within the centrosome. B. they are nonmembranous organelles. C. they are part of the cytoskeleton. D. they consist of microtubules. E. they organize the mitotic spindle during cell division.