hormonal control of reproduction

Question 1

hormones are chemical messengers produced by

Answer 1

endocrine glands

Question 2

hormones are released directly into the bloodstream

Answer 2

and travel to their target tissue organ

Question 3

hormones control the

Answer 3

onset puberty
sperm production
menstrual cycle

Question 4

the hypothalamus releases a hormone called

Answer 4

GRH- grande releasing hormone

Question 5

pituitary gland releases 2 hormones

Answer 5

LH-luteinizing hormone
FSH- follicle stimulating hormone
ICSH- interstitial cell stimulating

Question 6

FSH

Answer 6

promotes sperm production

Question 7

ICSH-

Answer 7

stimulates the interstitial cells in the testes to produce the male sex hormone called testosterone.

Question 8

testosterone stimulates

Answer 8

sperm production in seminiferous tubules and activates the prostate gland and seminal vesicles to produce their fluid secretions.

Question 9

overproduction of testosterone

Answer 9

prevented by a negative feedback mechanism

Question 10

high testosterone levels inhibit the secretion of

Answer 10

FSH and ICSH from the pituitary gland, resulting in a decrease in the production of testosterone by interstitial cells.

Question 11

how long the menstrual cycle takes

Answer 11

28 days

Question 12

follicular phase , FSH stimulates the development and maturation of

Answer 12

a follicle surrounding the ovum and the production of the sex hormones

Question 13

oestrogen stimulates the

Answer 13

repair and vascularisation of the endometrium, thicken it and preparing if for implantation

Question 14

High levels of oestrogen stimulate the secretion

Answer 14

of LH by the pituitary gland.

Question 15

In the luteal phase,a surge in LH triggers

Answer 15

ovulation and then stimulates the development of the corpus luteum from the follicle

Question 16

LH also stimulates the

Answer 16

corpus luteum to secrete the sex hormone progesterone

Question 17

progesterone promotes the further development and vascularisation

Answer 17

of the endometrium, preparing it for implantation of a blastocyst if fertilisation occurs.

Question 18

high levels of oestrogen and progesterone inhibit the secretion

Answer 18

of FSH and LH by the pituitary gland, which prevents further follicles from developing

Question 19

The inhibition of FSH and LH by high levels of oestrogen and progesterone is an example

Answer 19

of negative feedback control.

Question 20

if fertilization does not occur:

Answer 20

there is a drop in LH levels, which causes the corpus luteum to break down , and also causes a decrease in progesterone and oestrogen levels

Question 21

The decrease in oestrogen and progesterone levels causes the endometrium to break down and triggers the

Answer 21

start of metabolisms