Science Quiz / Male reproduction

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Which two enzymes catalyze the conversion of progestins to androgens?
T/F: The exogenous administration of testosterone can lead to infertility
this gland is involved in producing pre=ejaculate
Which cell maintains the blood testes barrier?
The release of what substance from the nerve terminal of the cavernous nerve causes vasodilation?
GnRH is composed of ____ amino acids.
______ acts on gonadotophs to prevent the release of FSH
T/F: Testosterone, estradiol, and DHT provides positive feedback regulation at the hypothalamus and anterior pituitary gland.
involved in production of a substance that gives ejaculate its alkaline nature
Which enzyme catalyzes the conversion of cholesterol to progestins
testosterone serves as a negative feedback regulator for the release of what hormone?
synthesizes inhibin
Luteinizing hormone acts on which cell in males?
pH of prostatic fluid
Which cells are responsible for removing damaged germ cells from the testes?
T/F: germ cells express estrogen receptors which optimize spermatogenesis.
sperm accounts for what percentage of total ejaculate
testosterone travels in the blood bound to what protein?
seminal fluid accounts for what percentage of total ejaculate
Testosterone concentration is ____ times higher in the testes than the blood.
The binding of Testosterone to what protein helps keep a steady supply of it in the testes.
FSH acts on which cell in males?
How many days does spermatogenesis take?
Which hormone binds to the same receptor as LH?
T/F: Drugs like viagra work by inhibiting the enzyme (Type V phosphodiesterase), which catalyzes the breakdown of cGMP (cGMP stimulates vasodilation).
What type of junctional complex helps maintian the blood testes barrier?
synthesizes androgen binding protein
True or False: The epididymis is involved in sperm production.
produces seminal fluid containing nutrients, fructose, and prostaglandins
Which cells provide nourishment to developing germ cells?
Which portion of the autonomic nervous system controls erection?
Which hormone causes baldness and hair recession in males that are aging?
sex binding hormone binding globulin is made in which organ?
catalyzes the conversion of testosterone to estradiol?
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Created Feb 25, 2012ReportNominate
Tags:male, reproduction

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