The area in the center of the A band that contains no thin filaments is the
A) Z line.
B) M line.
C) H band.
D) I band.
E) zone of overlap.
Answer: C
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Which of the following results in noninsulin-dependent diabetes mellitus?
A. Glucagon is able to compensate for the deficiency of insulin. B. Somatostatin is able to compensate for the deficiency of insulin. C. Insulin is secreted but target cells lack receptors for it. D. Insulin binds to its target cells but the cAMP second-messenger system fails to work. E. Excessive secretion of insulin triggers hypoglycemia.
The ascending aorta begins at (the)
A) external carotid artery. B) conus arteriosus. C) aortic valve. D) apex of the heart. E) All of the answers are correct.
Choose the false statement about smooth muscle
a. It is under involuntary control. b. It does not have troponin. c. Its contraction is initiated neurogenically only. d. It is found in walls of hollow tube-like organs. e. It is innervated by the ANS.
The structural unit of compact bone is the __________.
A. canaliculius B. osteon C. lacuna