Reproductive Physiology Flashcards Preview

ENDOCRINE > Reproductive Physiology > Flashcards

Flashcards in Reproductive Physiology Deck (16)
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1
Q

What is the normal range of menstrual cycle length?

A

21-35 days

2
Q

How many days does menstruation usually last and how much blood is usually lost?

A

Average duration of menses 3-8 days

Normal estimated blood loss - approximately 30 ml

3
Q

What day does ovulation usually occur in a 28 day cycle?

A

14

4
Q

Describe what happens during follicular development?

A

Granulosa cells around egg enlarge
Release oestrogen
causes this uterine lining to thicken

5
Q

What colour is the corpus luteum and why?

A

Luteum = latin for yellow

Due to cholesterol

6
Q

When is the peak progesterone usually taken?

A

1 week after ovulation takes place

7
Q

What attaches the ovary to the pelvic side wall?

A

IP ligament

8
Q

Describe the release pattern of GnRH and its half life?

A

pulsatile manner

T1/2 = 2-4 mins

9
Q

What enzyme is activated by FSH to promote the production of oestrogen?

A

Aromatase

10
Q

What receptors does oestrogen act on?

A
  • Induces FSH and LH receptors
11
Q

What cells are acted on by LH?

A

Theca cells

12
Q

Where is Activin found and what is its role?

A

Found in follicular fluid

Stimulates FSH induced oestrogen production

13
Q

Where is inhibin found and what is its role?

A
  • peptide in the follicular fluid
  • ve feedback on FSH
  • Locally enhances LH-induced androstenedione production
14
Q

What cells are found in the seminiferous tubules of the testis?

A

Sertoli cells

Germ cells

15
Q

What cells are found in the interstitium of the testes?

A

Leydig cells

Capillaries

16
Q

Describe the process of fertilisation once the sperm meets the egg

A
  • Chemotaxis
  • Release of acrosomal enzymes
  • Binding of sperm
  • Passage through extracellular envelope
  • Fusion of pronuclei