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HF&F Exam 2 > Q 6: Male Reproductive Physiology > Flashcards

Q 6: Male Reproductive Physiology Flashcards

1
Q

What is the acrosome?

A

The tip of the head that contains genetic material and enzymes that allows the sperm to fuse to the ovum membrane

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2
Q

How does sperm find its way to the ovum/egg?

A

Chemotactic sensors

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3
Q

What component allows for movement of sperm>

A

Axoneme

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4
Q

Where does spermatogenesis occur?

A

Seminiferous tubules

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5
Q

What are the seminiferous tubules lined with?

A

Spermatogonia

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6
Q

What is spermatogonia

A

Lines seminiferous tubules

Germinal epithelial cells

2-3 cells deep

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7
Q

What do spermatogonia become?

A

Haploid sperm

The spermatogonia proliferate and replace themselves

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8
Q

What surrounds the spermatogonia?

A

Sertoli cells

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9
Q

What are Sertoli cells

A

Help the sperm develop

Supply sperm with nutrients

Translocating the differentiating sperm cells and form blood-testis barrier

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10
Q

What would happen if sperm were exposed to blood

A

An auto-immune response would occur

Blood-testis barrier is vital

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11
Q

What does LH (Lutinizing hormone) do?

A

Stimulate leydig cells (primary source of testosterone)

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12
Q

What does inhibin do?

A

Produced by Sertoli cells

Negative feedback in excess FSH secretion

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13
Q

what does growth hormone do?

A

Basic total regulation of testes metabolism

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14
Q

What does FSH do?

A

Stimulates Sertoli cells

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15
Q

What does testosterone do?

A

Secreted by leydig cells

Drives division of spermatogonia

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16
Q

What do estrogens do?

A

Formed from testosterone by Sertoli cells

Regulators of spermatogenesis

17
Q

What do the seminiferous tubules funnel into before reaching the rete testis?

A

Tubulus rictus

18
Q

What is the tubule between the tubulus rectus and the epididymis?

A

Rete testis

19
Q

How many sperm do two testes produce per day????

A

120 million :O

20
Q

How long can sperm be parked in the vas deferens awaiting deployment

A

One month, obviously shorter if sexually active

21
Q

What does fibrinogen do in semen?

A

It is cleaved to form fibrin which will form a clot (allowing semen and its contents to continue moving along together)

22
Q

What components of the semen are added by the seminal vesicles?

A

Fructose (fuel for sperm)

Prostaglandins (causing uterine contractions pulling sperm along)

Fibrinogen (forms clot to move semen along together)

23
Q

What does the prostate gland contribute to the semen?

A

Clotting enzymes (keep things together)

Pro-fibrinolysin (plasminogen) - eventually helps breakdown clot

Various alkaloids (neutralize pH)

24
Q

What secretes the “pre-ejaculate” that has lubricating fx?

A

Bulbourethral glands

HF&F Exam 2 (15 decks)

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