From The Textbook

Question 1

How many oogonia by 20 weeks?

Answer 1

7 million

Question 2

How many oocytes at birth and at puberty?

Answer 2

1 million at birth

0.4 million at puberty

Question 3

What is the chromosome number in gametes?

Answer 3

23, half of that in other cells

Question 4

What stage is the primary oocyte suspended in?

Answer 4

Prophase

Question 5

When does the second meiotic division occur?

Answer 5

When the ovum enters the Fallopian tube.

Question 6

What are thecal cells?

Answer 6

Stromal cells aggregated around the follicles

Question 7

What forms the corona radiata?

Answer 7

The innermost layers of granulosa cells

Question 8

When is the corpus luteum formed

Answer 8

After ovulation

Question 9

What stimulates follicular growth

Answer 9

FSH

Question 10

What stimulates LH receptor development

Answer 10

FSH

Question 11

Where is oestrogen produced?

Answer 11

The follicles of the ovary

Question 12

What does the corpus luteum produce?

Answer 12

Oestrogen and progesterone

Question 13

What occurs during the menstrual phase of the endometrial cycle

Answer 13

The functional layer of the endometrium is shed

Question 14

When is the repair phase?

Answer 14

Day 4-7

Question 15

Describe the follicular phase

Answer 15

Maximum period of growth of endometrial glands (due to oestrogen)

Question 16

Features of the luteal phase

Answer 16

Saw-toothed glands, pseudodecidual reaction in stroma.

Question 17

How long does full maturation of sperm take?

Answer 17

64-70 days

Question 18

What do mature sperm develop from?

Answer 18

Haploid spermatids

Question 19

What is the head of a sperm covered by?

Answer 19

The acrosomal cap

Question 20

What does the body of the sperm contain?

Answer 20

Helix of mitochondria

Question 21

What dos the tail of the sperm consist of?

Answer 21

2 longitudinal fibres and nine pairs of fibres

Question 22

Where does seminal plasma originate?

Answer 22

Prostate, seminal vesicles, bulbourethral glands

Question 23

Why does the semen contain a high concentration of fructose?

Answer 23

To provide energy for sperm motility

Question 24

Why does semen contain high concentration of prostaglandins?

Answer 24

Potent stimulatory effect on uterine musculature

Question 25

Where does final sperm maturation occur?

Answer 25

In the oviduct

Question 26

What initiates the acrosomal reaction?

Answer 26

Adherence of the sperm to the ovum

Question 27

What is syngamy

Answer 27

The fusion of male and female chromosomes

Question 28

When is the morula formed?

Answer 28

36hrs after after fertilisation

Question 29

When does implantation occur?

Answer 29

6 days after fertilisation

Question 30

What causes penile erection?

Answer 30

Compression of venous channels

Question 31

How is ejaculation mediated?

Answer 31

Contraction of bulbocavernous and ischiocavernous muscles.

Question 32

Where does vaginal lubrication come from?

Answer 32

Vaginal transudation and bartholins glands secretion

Question 33

Changes to the cervix in pregnancy (5)

Answer 33

Increased vascularity
Reduction in collagen
Accumulation of glycosaminoglycans and water
Hypertrophy of cervical glands
Increased mucus secretions

Question 34

Where do primordial germ cells develop from

Answer 34

Yolk sac