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Unit 2 KA2 - Hormonal Control if Reproduction

What in the brain begins to secrete a releaser hormome?

The hypothalamus gland

What does the releaser hormone target?

The pituitary gland

What two hormones are released when the releaser hormone stimulates the pituitary gland?

FSH
ICSH/LH

What does the release of these hormones trigger?

The onset of puberty

Pituitary gland hormones (females)

FSH
LH

Pituitary gland hormones (male)

FSH
ICSH

what does FSH promote?

Sperm production

what does ICSH produce?

testosterone

What else stimublates sperm production?

Testosterone

What does testosterone activate during sperm production?

The prostate gland and seminal vesicles.

How long does the menstrual cycle last?

about 28 days

The first day of the menstrual cycle is the first day of...

menstruation

FSH stimulates the development of a...

follicle and the production of oestregen by the follicle in tje follicular phase

What does Oestregen stimulate?

Proliferation of the endometrium preparing it for implantation.

What does the consistency of the cervical mucus mean?

It makes it more easily penetrable by sperm

Peak levels of oestregen stimulate a surge in the secretion of...

LH

What does a surge in LH trigger?

Ovulation

What is ovulation

the release of an egg from a follicle in the ovary

When does ovulation occur

At the midpoint of the menstrual cycle

What happens in the luteal phase?

The follicle develops into a corpus luteum secretes progesterone

What does progesterone promote?

Further development and vascularisation of the endometrium preparing it for implantation if fertilisation occurs

What is the negative feedback effect kfcthe ovarian hormones on the pituitary gland and the secretion of FSH and LH?

It prevents further follicles from developing

What does a lack of LH lead to? (negative feedback)

The degeneration of the corpus luteum with a subsequent drop in progesterone levels leading to menstruation

What happens to the corpus luteum if fertilisation does't occur?

It doesnt degenerate and progesterone levels remain high

Cuestionario
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21