Component 2

Question 1

Sequence of oogenesis and spermatogensis

Answer 1

Germinal epithelium
(Spermat/o)ogonium
Primary
Secondary 
Spermatozoa/ ovum

Question 2

Stages of development of sex cells

Answer 2

2 rounds of mitosis, meiosis i and meiosis ii

Question 3

FSH

Answer 3

Stimulate development of graafian follicle
Positive feedback of oestrogen early in cycle
Negative feedback on oestrogen later in cycle

Question 4

LH

Answer 4

Stimulates Graafian follicle into corpus luteum
Positive feedback on FSH
Stimulates ovulation

Question 5

Oestrogen

Answer 5

Negative feedback on FSH
Positive feedback on LH
Rebuild endometrium
Inhibit prolactin and oxytocin synthesis

Question 6

Progesterone

Answer 6

Maintains endometrium
Negative feedback on FSH
Negative feedback on LH

Question 7

When does oogenesis stop at birth

Answer 7

Primary oocyte after mitosis

Question 8

When can fertilisation take place

Answer 8

After capacitation

Question 9

What happens when the sperm reaches the egg

Answer 9

Acrosome reaction
Digests the cells of the corona radiata
Once reaching zona pellucida releases protease and acrosin