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Medsci142 > Reproduction Lab > Flashcards

Reproduction Lab Flashcards

1
Q

How long does it take for a spermatozoa to form?

A

~60 days

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2
Q

Name five common contraceptive methods

A

Condom, diaphragm, pill, IUD, vasectomy/tubal ligation

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3
Q

What does the combined oral contraceptive pill do?

A

Elevates oestrogen and progesterone levels which inhibits FSH and LH, leading to inhibition of ovulation

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4
Q

How does the contraceptive pill prevent pregnancy?

A

Inhibits GnRH

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5
Q

What contraceptive device comes in direct contact with the cervix?

A

Diaphragm

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6
Q

What does a chemical IUD do?

A

Immobilise sperm, increase WBC in the uterus

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7
Q

What does a hormonal IUD do?

A

Slowly secrete progesterone to increase cervical mucous

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8
Q

What do spermicides do to sperm?

A

Disrupt sperm plasma membranes

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9
Q

How many chromosomes do spermatogonia have?

A

46 (2n)

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10
Q

How many chromosomes do primary spermatocytes have?

A

46 (2n)

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11
Q

How many chromosomes do secondary spermatocytes have?

A

23 (n)

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12
Q

How many chromosomes do spermatids have?

A

23 (n)

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13
Q

How many chromosomes do spermatozoa have?

A

23 (n)

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14
Q

What cells dispose of the excess sperm cytoplasm?

A

Sustenicular cells

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15
Q

What is the final stage of spermatogenesis?

A

Spermiogenesis

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16
Q

How many sperm complete spermatogenesis every day?

A

300 million

17
Q

How long is a spermatid?

A

60um

18
Q

How long is the head of the sperm?

A

4-5um

19
Q

What is the process in which oocytes degenerate?

A

Atresia

20
Q

What is the state of the oocytes prior to puberty?

A

Primordial follicles in prophase of meiosis 1

21
Q

How many chromosomes does an oogonium have?

A

46 (2n)

22
Q

How many chromosomes does a primary oocyte have?

A

46 (2n)

23
Q

How many chromosomes does a secondary oocyte have?

A

23 (n)

24
Q

At what stage is a secondary oocyte prior to fertilisation?

A

Meiosis 2

25
Q

What do high levels of progesterone do?

A

Inhibit secretion of GnRH and LH

26
Q

What 2 hormones decrease the most immediately following ovulation?

A

LH and estrogen

27
Q

What is non-incisional sterilization?

A

Insertion of coil made of polyester fibres and metals, which scar tissue grows around

Medsci142 (15 decks)

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