Ovaries And Testes Flashcards

0
Q

What’re the stages of oogenesis that result in 1 egg from (haploid cell) from a primary oocyte (diploid)?

A

The ovaries contain primary oocytes. The primary oocyte (diploid) is replicated (interphase) this diploid then goes through meiosis 1 to give 2 haploid cells. These haploid cells then go through meiosis 2 to give 4 (2 each) new haploid cells. 3 of these polar bodies are smaller than the 4th daughter cells and will disintegrate. Only one will survive and become the mature ovum.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What is oogenesis?

A

The creation of an ovum (mature egg)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where does oocyte development occur in humans?

A

The ovaries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

If more than one follicle matures, what is the result?

A

Fraternal twins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the release of the secondary oocyte from the ovaries called?

A

Ovulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the large tertiary follicle they can be expected to suffice for ovulation called?

A

The Graafian follicle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the three stages of the menstrual cycle?

A

Menstruative phase, proliferative phase and secretory phase.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the three stages of the ovarian cycle?

A

Follicular phase, ovulation and luteal phase.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What day does bleeding begin?

A

Day 0.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What phase is this: ovarian follicles mature and get ready to release an egg.

A

Follicular phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What phase is this: mature egg is released from ovarian follicles into oviduct.

A

Ovulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What phase is this: Corpus luteum atrophies.

A

Luteal phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What phase of the uterine cycle does the luteal phase correspond to?

A

Secretory phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What hormones are required by the corpus luteum to maintain itself?

A

LH and FSH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the hormone progesterone produced?

A

The corpus luteum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do falling levels of progesterone trigger?

A

Menstruation

16
Q

What phase is this: flow of menses.

A

Menstruative phase

17
Q

What phase is this: estrogen causes lining of uterus to grow/proliferate.

A

Proliferative phase

18
Q

What phase is this: corpus luteum produces progesterone which plays role in blastocyst implantation

A

Secretory phase

19
Q

What is spermatogenesis?

A

The process by which spermatozoa are produced from the male primordial germ cells by means of mitosis and meiosis.

20
Q

Describe the process from single spermatogonia to 4 mature spermatozoa.

A

1 spermatogonia yields 1 primary spermatocyte by mitosis. The primary spermatocyte divided meiotically (meiosis 1) to give 2 secondary spermatocytes. Each secondary spermatocyte divides into 2 spermatids by means of meiosis 2. These 4 spermatids mature into spermatozoa, also known as sperm cells.

21
Q

What is the term given to the non cyclic production of sperm?

A

continual total production

22
Q

What male accessory organ concentrates and stores sperm?

A

Epididymis

23
Q

What male accessory organ produces semen into the ejaculatory duct?

A

Seminal vesicles

24
What male accessory organ produces alkaline fluid and clotting enzymes?
Prostate gland
25
What male accessory organ secretes mucus as a lubricant?
Bulbourethral gland
26
What pituitary hormone acts on Leydig cells to regulate testosterone secretion?
LH
27
What pituitary hormone acts on Sertoli cells to enhance spermatogenesis?
FSH
28
What effect does too much testosterone have on spermatogenesis?
It suppresses it