The Leydig cells of the typical vertebrate testis
A) Produce testosterone.
B) Develop into spermatids.
C) Produce androgen-binding proteins.
D) Mediate the response of the testis to FSH.
Answer: A
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Muscle groups found along the anterior and lateral surfaces of the leg act primarily to
A) abduct the leg. B) extend the leg. C) adduct the leg. D) flex the leg. E) None of the answers are correct.
Lyme disease is
A. an inflammation of any joint. B. a bacterial infection transmitted by ticks. C. the most common type of arthritis. D. a metabolic disorder caused by increased uric acid in blood. E. a condition that may involve an autoimmune disease.
Which of the following muscles is mainly responsible for elevating the sternum during forced inspiration?
A. External intercostal B. Pectoralis minor C. External oblique D. Sternocleidomastoid E. Diaphragm
C) sodium, potassium, or calcium
A) any type of channel closing. B) closing of the channel even when the stimulus continues. C) closing of the channel in response to decrease in the stimulus. D) None of the answers are correct.