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Male reproduction Quiz Stats

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Question Answer % Correct
T/F: germ cells express estrogen receptors which optimize spermatogenesis.True
66.7%
True or False: The epididymis is involved in sperm production.False. It is involved in sperm transport and maturation.
61.1%
T/F: Testosterone, estradiol, and DHT provides positive feedback regulation at the hypothalamus and anterior pituitary gland.False. These are negative feedback regulators
55.6%
T/F: The exogenous administration of testosterone can lead to infertilityTrue
52.8%
T/F: Drugs like viagra work by inhibiting the enzyme (Type V phosphodiesterase), which catalyzes the breakdown of cGMP (cGMP stimulates vasodilation).True
44.4%
seminal fluid accounts for what percentage of total ejaculate60 - 70%
41.7%
Luteinizing hormone acts on which cell in males?leydig cells
41.7%
involved in production of a substance that gives ejaculate its alkaline natureprostate
36.1%
testosterone serves as a negative feedback regulator for the release of what hormone?Luteinizing hormone
36.1%
sperm accounts for what percentage of total ejaculate10%
33.3%
produces seminal fluid containing nutrients, fructose, and prostaglandinsseminal vesicle
30.6%
sex binding hormone binding globulin is made in which organ?liver
27.8%
catalyzes the conversion of testosterone to estradiol?aromatase
27.8%
Which portion of the autonomic nervous system controls erection?parasympathetic
27.8%
this gland is involved in producing pre=ejaculatebulbourethral gland
25%
______ acts on gonadotophs to prevent the release of FSHinhibin
25%
The binding of Testosterone to what protein helps keep a steady supply of it in the testes.androgen binding protein or ABP
25%
Question Answer % Correct
GnRH is composed of ____ amino acids.10
22.2%
The release of what substance from the nerve terminal of the cavernous nerve causes vasodilation?nitric oxide
22.2%
pH of prostatic fluid6.5
19.4%
Testosterone concentration is ____ times higher in the testes than the blood.100
19.4%
Which hormone causes baldness and hair recession in males that are aging?dihydroxytestosterone or DHT
16.7%
Which cells provide nourishment to developing germ cells?sertolli cells
13.9%
Which cells are responsible for removing damaged germ cells from the testes?sertolli cells
13.9%
What type of junctional complex helps maintian the blood testes barrier?tight junctions
13.9%
FSH acts on which cell in males?sertolli cells
13.9%
Which cell maintains the blood testes barrier?sertolli cells
11.1%
synthesizes androgen binding proteinsertolli cells
11.1%
synthesizes inhibinsertolli cells
11.1%
testosterone travels in the blood bound to what protein?sex hormone binding globulin or SHBG
11.1%
How many days does spermatogenesis take?72
8.3%
Which hormone binds to the same receptor as LH?hCG
8.3%
Which enzyme catalyzes the conversion of cholesterol to progestinsside chain cleavage enzyme
5.6%
Which two enzymes catalyze the conversion of progestins to androgens?17a hydroxylase and 17 20 desmolase
2.8%

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Created Feb 25, 2012ReportNominate
Tags:male, reproduction

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