Failure to attain erection is called impotence
Indicate whether the statement is true or false.
Answer: True.
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Male reproductive functions are controlled mainly by hormones from the hypothalamus and
A. posterior pituitary and adrenal glands. B. anterior pituitary gland and testes. C. posterior pituitary gland and testes. D. anterior pituitary and adrenal glands.
In which of the following forms does Ca2+ exhibit profound effects on such things as neuromuscular excitability?
a. free, unbound diffusible Ca2+ b. intracellular Ca2+ c. calcium phosphate crystals impregnated in the organic matrix of bone d. calcium bound to plasma proteins e. insoluble Ca2+ salts
Which of the following statements about the citric acid cycle is false?
A. The process occurs in the mitochondria. B. The major end product of the cycle is lactic acid. C. At several steps, NADH molecules are formed. D. Carbon dioxide is produced at several steps in the cycle. E. Two ATP are formed in the cycle from one glucose.
Which of the following is not a function of the sebum?
A) It inhibits growth of bacteria. B) It lubricates the hair shaft. C) It conditions the surrounding skin. D) It helps the skin shed excess heat. E) It protects the hair shaft.