The interstitial cells in the testes
A. secrete testosterone.
B. form the lining of the seminiferous tubules.
C. undergo mitosis to produce primary spermatocytes.
D. convert fructose to glucose to nourish the sperm.
E. support and protect the developing sperm cells.
Answer: A
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Fill in the blank(s) with correct word
Which of the following most likely occurs in the condition called hyperkalemia?
A) decreased heart rate B) increased rate of depolarization at the SA node C) irregular cardiac contractions D) fluid collection in the pericardial sac E) elevated calcium concentrations
An injury that results in complete functional loss of the ulnar nerve will affect which of the following muscles?
A. Extensor indicis B. Brachioradialis C. Flexor carpi radialis D. Abductor digiti minimi E. Abductor pollicis brevis
Secondary sexual characteristics, such as the beard of a male, are probably controlled by the balance of hormones.
a. true b. false