The androgen-binding protein functions to
A. transport androgens in the plasma.
B. confer responsiveness of certain cells to male sex hormones.
C. exert negative feedback on the production of testosterone by the Leydig cells.
D. transport testosterone across cell walls.
E. bind and maintain high concentrations of testosterone in the seminiferous tubules.
Answer: E
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Which statement is correct concerning the terms afferent and efferent with respect to the nervous system?
A. Both terms refer to conducting impulses toward the CNS although afferent pathways carry only motor impulses. B. Afferent refers to the conduction of sensory impulses toward the CNS. C. Afferent refers to the conduction of an impulse outward from the CNS. D. Both terms refer to conducting impulses outward from the CNS although efferent pathways carry only sensory impulses. E. Efferent refers to the conduction of motor impulses toward the CNS.
Which darkly pigmented structure reduces light reflection within the eyeballs?
a) Sclera b) Conjunctiva c) Iris d) Choroid e) Retina
When the tidal volume is large, as during exercise, the Bohr reflex is triggered to prevent over-inflation of the lungs
a. True b. False Indicate whether the statement is true or false
Which lymphatic organs have a cortex and medulla?
A. Thymus and spleen B. Thymus and lymph nodes C. Lymph nodes and spleen D. Red bone marrow and lymph nodes