The neurotransmitter active in skeletal muscle contraction is ________.
A. acetylcholine
B. norepinephrine
C. serotonin
D. epinephrine
Answer: A
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The membrane that lines the lumenal surfaces of the digestive, respiratory, urinary, and reproductive tracts consists of _________.
A. simple squamous epithelium and dense irregular connective tissue B. areolar and dense irregular connective tissue C. epithelium and lamina propria D. areolar tissue and lamina propria E. simple squamous epithelium and areolar tissue
A man has been told that he is not synthesizing enough follicle-stimulating hormone (FSH), and for this reason he may be unable to father a child. Choose the correct statement to explain this problem.
A) FSH stimulates estrogen secretion by ovarian cells; therefore it is not synthesized by males. B) The physician is wrong?a hormone made in the adenohypophysis could not influence fertility. C) FSH stimulates sperm production in the testes. D) The man must be producing progesterone, which inhibits the synthesis of FSH.
Which blood vessels branch directly off of the aorta at the level of the aortic semilunar valves?
A. Great cardiac veins B. Right and left pulmonary arteries C. Brachiocephalic arteries D. Right and left subclavian arteries E. Right and left coronary arteries
The rotator cuff is made up of the following muscles:
a. Supraspinatus b. infraspinatus c. teres minor d. subscapularis (SITS). e. All of the above