BIOL 404-Exam 4-Reproduction 6

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What allows the movement of influential fluids from one sertoli cell to the next?

Tight Junctions
The ion and nutrients found in the fluid around the spermatagonia are created by fluid moving through what?

Tight junctions
Primary spermatocytes gain nutrient from what part of the testis?

The lumen of the seminiferous tubules
What cells provide a barrier between spermatogonia and chemicals in the plasma?

Sertoli cells
What does androgen binding protein so?

Binds testosterone
Where is androgen binding protein produced?

Sertoli cells
What is the purpose of androgen binding protein?

In binds testosterone and allows it to be transported to the lumen o fthe seminiferous tubules and have effects there
What binds to testosterone to aid in its transport to the lumen of th seminiferous tubules?

Androgen binding protein
Sertoli cells send a paracrine signal to what other cells?

Leydig
Sertoli cells respond to testosterone and FSH and secrete paracrine signals that cause what reponse?

Proliferation and differentiation of sperm
What cells produce inhibin?

Sertoli cells
What is the purpose of inhibin?

Negative feedback to FSH secretion
What hormone inhibits FSH release from the anterior pituitary?

Inhibin
What two areas of the male gonads remove/phagocytize defective sperm?
- Sertoli cells
- Cells in Epididymis
Testosterone is required for the initiation of what?

Spermatogenisis
What effect does testosterone have on the Hypothalamus and pituitary?
- Decreases secretion of GnRH (hypothalamus)
- Inhibits secretion of LH (anterior pituitary)
What general effect does testosterone have on male reproductive organs?

Induces differentiation and maintains their function
What systemic effect does testosterone have?
- After tissue conversion to Dihydrotestosterone=
- Stimulates Male secondary sex characteristics
- Opposes estrogen action on breast development
What hormone causes secondary male sex characteristics?

Dihydrotestoterone

Author

kyleannkelsey

215651

Card Set

BIOL 404-Exam 4-Reproduction 6

Description

BIOL 404-Exam 4-Reproduction 6

Updated

2013-04-25T00:54:27Z

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