UNIT2 KA2 Hormonal Control Of Respiration

Question 1

What is the function of oestrogen during the menstrual cycle

Answer 1

Stimulates, repairs and proliferation (thickens) the endometrium

Question 2

When a corpus luteum degrades what effects does it have on progesterone and oestrogen, and the endometrium

Answer 2

Progesterone/oestrogen = reduced

Endometrium = low result in menstruation

Question 3

What is the function of progesterone during the menstrual cycle

Answer 3

Promotes further growth + vascularisation ready for implantation

Question 4

What effect does FSH have on the ovaries

Answer 4

FSH stimulates the development of the follicle and the production of oestrogen

Question 5

What hormone is released in phase 2 of the menstrual cycle

Answer 5

Progesterone

Question 6

What is produced at the target tissue

Answer 6

follicle stimulating hormone ( FSH )

Male - ICSH
Female - LH

Question 7

What is the produced from the hypothalamus

Answer 7

Releaser hormone

Question 8

What is the target tissue for the releaser hormone

Answer 8

Pituitary gland

Question 9

What is phase 2 called of the menstrual cycle

Answer 9

Luteal phase (days 14-28)

Question 10

What effect does FSH have on the testes

Answer 10

Promotes sperm production in the semiferous tubules

Question 11

What effect does ICSH have on the testes

Answer 11

Stimulates the production of testosterone in the interstitial cells

Question 12

What hormone is released in phase 1 of the menstrual cycle

Answer 12

Oestrogen

Question 13

How is testosterone and sperm production controlled by negative feedback

Answer 13

Increased levels of testosterone in the blood inhibited FSH + LH from the pituitary gland

Question 14

What is the negative feedback control of the menstrual cycle

Answer 14

Progesterone = negative impact on FSH+LH, they are inhibited so no follicle is produced

Absence in LH= corpus luteum degrades raising progesterone levels to fall leading to menstruation

Question 15

What are the key points of the luteal phase

Answer 15

• Remaining follicle cells develop into a corpus luteum which secrete progesterone
• Progesterone then promotes the development and vascularstation of the endometrium preparing for implantation
• progesterone causes thickening of cervical mucus

Question 16

What is phase 1 called of the menstrual cycle days

Answer 16

Follicular phase (1-14)

Question 17

When the corpus luteum remains, how does this effect progesterone levels and the secretion of FSH + LH

Answer 17

Progesterone levels = remain the same of can increase

FSH + LH = inhibited by the negivtive feedback effect of high progesterone levels

Question 18

What are the key points of the follicular phase

Answer 18

• FSH stimulates the development of a follicle and the production of oestrogen
• oestrogen stimulates proliferation of the endometrium in preparation for implantation of the zygote
• oestrogen affects cervical mucas consistency
• peak levels of oestrogen stimulates a surge in LH secretion which triggers ovulation