Menstrual Cycle

Question 1

What happens in menstrual cycle a 1-5 days then at day 14

Answer 1

1-5 the lining of uterus breaks down. Day 14 ovulation (egg released)

Question 2

What is the function of the hormone oestrogen and where it is secreted from

Answer 2

Oestrogen, secreted from the ovaries, inhibits FSH production and increases LH production

Question 3

What controls menstrual cycle

Answer 3

Hormones control the menstrual cycle. (Oestrogen, progesterone, LH and FSH

Question 4

What is a hormone and where are they secreted from

Answer 4

Hormones are chemical substances that control processes within the body. They are secreted by glands e.g pituitary gland

Question 5

Function of LH in menstrual cycle

Answer 5

Stimulates release of an egg from ovary

Question 6

How can FSH be used to control fertility

Answer 6

FSH given to women who want to get pregnant but having difficulty. It increases number of mature eggs, increasing chance of becoming pregnant and mature eggs can be collected for IVF

Question 7

Problems using FSH for fertility treatment

Answer 7

FSH can lead to multiple eggs being released resulting in multiple offspring

Question 8

Function of FSH and where is it secreted from

Answer 8

Secreted by pituitary gland, causes egg to mature and stimulates ovaries to produce oestrogen

Question 9

How does contraceptive pill work

Answer 9

Oestrogen and progesterone are used to stop FSH production, stopping any eggs maturing, preventing pregnancy

Question 10

What do light receptors contain

Answer 10

Nucleus, cytoplasm, and cell membrane

Question 11

How is information passed through the nervous system

Answer 11

Information from receptors passes along cells (neurones) in nerves to the brain. The brain coordinates the response. Reflex actions are automatic and rapid. They often involve sensory, relay and motor neurones.