KA2

Question 1

What is a hormones

Answer 1

A chemical messenger that is produced on one site and has a effect on another site

Question 2

What are hormones produced by, and what are they secretes directly into

Answer 2

Produced by endocrine glands and secreted into blood stream

Question 3

What does a hormone do when it reaches a target tissue

Answer 3

Brings about a specific effect

Question 4

Hormones produced in the pituitary gland and hypothalamus control what

Answer 4

Onset of puberty
Sperm production
Menstrual cycle

Question 5

What does the hypothalamus produces at puberty

Answer 5

Released hormone whose target is the pituitary gland

Question 6

The pituitary gland is then stimulated to produce

Answer 6

FSH & ICSI for males
And
LH & ICSI for females

Question 7

What does FSH DO

Answer 7

•FSH AND ICSH produced from the pituitary gland, travel in the bloodstream to the testes.

•FSH promotors sperm production in the seminiferous tubules

Question 8

What does ICSH do males

Answer 8

Stimulates interstitial cells to produce the hormone testosterone

Question 9

Roles of testosterone

Answer 9

· stimulates sperm production in the seminiferous tubals

•activates prostrate gland and seminal vesicles to produce their secretions

Question 10

Feedback pt1

What happens as the concentration of testosterone builds up in the blood stream

Answer 10

It inhibits the secretion of FSH AND ICSH from the pituitary gland

Question 11

P2 negative feed back

What does the secretion lead to?

Answer 11

Decrease in testosterone concentrations

Question 12

P3 negative feed back

When the testosterone con decreases then what

Answer 12

This then triggers the pituitary gland to again produce FSH and ICSH and so on

Question 13

P3 negative feed back

When the testosterone con decreases then what

Answer 13

This then triggers the pituitary gland to again produce FSH and ICSH and so on

Question 14

The menstrual cycle

Takes how many days

Answer 14

28 days

Question 15

What is the first day of menstrual cycle regarded us? (Blood flow)

Answer 15

Day one of the cycle

Question 16

Then at what day does the release of an egg a.k.a. ovulation occur at?

Answer 16

Day 14

Question 17

What are the two stages of the menstrual cycle?

Answer 17

1. follicular phase
2. The luteal phase

Question 18

Info about FSH

1) what does it do

Answer 18

• stimulates development and maturation of a follicle

•Stimulates production of the hormone hydrogen by the follicle

Question 19

Oestrogen

Answer 19

•Stimulates proliferation of the endometrium preparing it for implantation

•Peak levels of oestrogen stimulate a surge in the production of LH

•Affects the consistency of cervical mucus making it more easily penetrated by sperm

Question 20

LH (F phase)

Answer 20

Surge of LH directly triggers ovulation

Question 21

Luteal phase stimulate what?

Answer 21

•Stimulates the follicle to develop into corpus Lutem

•corpus lutem secreted progesterone

Question 22

What does proeogstrogen do

Answer 22

Promotes further development and increases valuation of the endometrium preparing it for implantation if fertilisation occurs

Question 23

Negative feedback females

What does high levels do

Answer 23

High levels of oestrogen and progesterone inhibit the secretion of FSH and LH by the pituitary gland

Concentrations of FSH & LH decreases preventing further follicles from developing