1.2 (P2) Control In The Body

Question 1

What three ways can water be lost from the body?

Answer 1

Sweat through your skin
Urine from your kidneys
Breathing from your lungs

Question 2

What can too much water do?

Answer 2

Destroy or damage cells

Question 3

What two ways can ions be lost from the body?

Answer 3

Sweat through your skin

Urine from your kidneys

Question 4

Why does core temperature need to be maintained?

Answer 4

To maintain optimum temperature for enzymes to work best at

Question 5

How does body maintain temperature?

Answer 5

Sweat
Capillaries constrict
Goosebumps
Skin flushes

Question 6

Why is blood sugar controlled?

Answer 6

Gives a constant supply of energy

Question 7

What do hormones do?

Answer 7

Coordinate processes within the body using chemical substances

Question 8

Where are hormones secreted from?

Answer 8

Glands

Question 9

How are hormones transported around the body?

Answer 9

They use the bloodstream

Question 10

What hormones are involved in the menstrual cycle?

Answer 10

FSH
Oestrogen
LH
Progesterone

Question 11

What is FSH and where is it secreted from?

Answer 11

Follicle Stimulated Hormone

The pituitary gland

Question 12

What does FSH do?

Answer 12

It stimulates the maturity of growth of the egg in the follicle

It stimulates the release of of oestrogen

Question 13

Where is oestrogen produced?

Answer 13

The ovaries

Question 14

What des oestrogen do?

Answer 14

Prohibits the production of FSH

Stimulates the lining of the uterus to thicken

Stimulates the production of LH

Question 15

What is LH? Where is it produced?

Answer 15

Luteinising Hormone

The Pituitary gland

Question 16

What does LH do?

Answer 16

LH causes the follicle to burst releasing the eggs into the Fallopian tubes

This is the start of ovulation

It stimulates the release of progesterone

Question 17

Where is progesterone produced?

Answer 17

From the yellow body which is the scab formed from the burst follicle

Or

Placenta

Question 18

What does progesterone do?

Answer 18

It maintains the lining of the uterus

Question 19

What two hormones are used in oral contraceptives?

Why these two?

Answer 19

Oestrogen and Progesterone

They inhibit FSH so stops the eggs maturing

Question 20

What did the first oral contraceptives have?

Answer 20

Too much oestrogen

Question 21

Why is progesterone only contraceptives preferable

Answer 21

Less side effects

Question 22

Arguments for hormones as contraceptives?

Answer 22

It can be more effective therefore more reliable than a condom

It’s your body so you can control the hormones as you please

Question 23

Arguments against hormones as contraceptives?

Answer 23

If God intended you to get pregnant you shouldn’t stop it

It could have serious long term effects if used regularly

Question 24

What treatment can be given to couples struggling to get pregnant?

Answer 24

IVF

In Vitro Fertilisation

Question 25

What hormones are given in IVF? Why?

Answer 25

FSH and LH

They burst and mature the eggs releasing more than one

Question 26

How is IVF completed?

Answer 26

The eggs are collected from the mother and fertilised with the fathers sperm in a petri dish

The fertilised eggs develop into embryos

The two strongest embryos will be inserted into the mothers uterus