The interstitial cells of the testes produce
A. seminal fluid.
B. androgens.
C. sperm cells.
D. spermatogenic cells.
Answer: B
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What activates the renin-angiotensin mechanism?
a) decreased body temperature b) decreased blood pressure c) increased body temperature d) increased blood pressure
Tubular secretion in the nephron is a process by which substances move ________
A) from the glomerulus into the nephron B) from the nephron into the peritubular capillary C) from the afferent arteriole into the glomerulus D) from the peritubular capillary into the nephron
Distinguishing the pitch of sounds is possible because
A. different frequencies of sounds stimulate different regions of the basilar membrane in the cochlear duct. B. different frequencies of sounds make the eardrum vibrate with different amplitudes. C. different frequencies of sounds cause different frequencies of action potentials in neurons in the auditory nerve. D. there are many different types of receptors for sound, each of which responds to a single frequency. E. different frequencies of sounds cause different kinds of action potentials in neurons in the auditory nerve.
Where is the spinous process in the diagram?
a) B b) C c) D d) E e) F