Reproductive Cycles (Task 2)

Question 1

Part of ovary containing follicles

Answer 1

Cortex

Question 2

Highly vasculated centre of ovary

Answer 2

Medulla

Question 3

Connective tissue giving ovary structure

Answer 3

Tunica Albuginea

Question 4

Time taken for follicles to become primary follicles

Answer 4

3-4 Months

Question 5

Time taken for primary follicles to become secondary follicles

Answer 5

70 days/3 Cycles

Question 6

Role of corpus luteum

Answer 6

Synthesises progesterone needed for decidualisation of endometrial lining

Question 7

Role of hCG

Answer 7

Signals Corpus Luteum to keep producing Progesterone to maintain the thick endometrial lining needed to support embryo

Question 8

Stages of the uterine cycle

Answer 8

Menstruation, Proliferative Phase, Secretory Phase

Question 9

Stages of ovarian cycle

Answer 9

Follicular Phase, Ovulation, Luteal Phase

Question 10

Endometrial blood supply

Answer 10

Uterine Artery > Arcuate Artery > Radial Arteries > Spiral Arteries > Sub-Epithelial Capillary Network

Question 11

Role of estradiol (E2)

Answer 11

Proliferation of the endometrium
Positive feedback leads to LH surge
Prepares endometrium for implantation

Question 12

Role of progesterone in pregnancy

Answer 12

Decidulalisation of Endomterium
Preparation for Implantation
Thickens Cervical Mucus
Reduces Uterine Smooth Muscle Contractibility
Decreases Maternal Immune Response for Acceptance of Pregnancy

Question 13

Progesterone as a contraceptive

Answer 13

Decreases GnRH Pulses
Suppression of LH and no LH Surge
Unreceptive Endometrium
Hostile Cervix

Question 14

Oestrogen as a contraceptive

Answer 14

Suppression of FSH
Suppression of Dominant Follicle formation
Stabilisation of Endometrium