1.2 (P2) Control In The Body Flashcards Preview

AQA GCSE - Biology > 1.2 (P2) Control In The Body > Flashcards

Flashcards in 1.2 (P2) Control In The Body Deck (26)
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1
Q

What three ways can water be lost from the body?

A

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

2
Q

What can too much water do?

A

Destroy or damage cells

3
Q

What two ways can ions be lost from the body?

A

Sweat through your skin

Urine from your kidneys

4
Q

Why does core temperature need to be maintained?

A

To maintain optimum temperature for enzymes to work best at

5
Q

How does body maintain temperature?

A

Sweat
Capillaries constrict
Goosebumps
Skin flushes

6
Q

Why is blood sugar controlled?

A

Gives a constant supply of energy

7
Q

What do hormones do?

A

Coordinate processes within the body using chemical substances

8
Q

Where are hormones secreted from?

A

Glands

9
Q

How are hormones transported around the body?

A

They use the bloodstream

10
Q

What hormones are involved in the menstrual cycle?

A

FSH
Oestrogen
LH
Progesterone

11
Q

What is FSH and where is it secreted from?

A

Follicle Stimulated Hormone

The pituitary gland

12
Q

What does FSH do?

A

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

It stimulates the release of of oestrogen

13
Q

Where is oestrogen produced?

A

The ovaries

14
Q

What des oestrogen do?

A

Prohibits the production of FSH

Stimulates the lining of the uterus to thicken

Stimulates the production of LH

15
Q

What is LH? Where is it produced?

A

Luteinising Hormone

The Pituitary gland

16
Q

What does LH do?

A

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

17
Q

Where is progesterone produced?

A

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

Or

Placenta

18
Q

What does progesterone do?

A

It maintains the lining of the uterus

19
Q

What two hormones are used in oral contraceptives?

Why these two?

A

Oestrogen and Progesterone

They inhibit FSH so stops the eggs maturing

20
Q

What did the first oral contraceptives have?

A

Too much oestrogen

21
Q

Why is progesterone only contraceptives preferable

A

Less side effects

22
Q

Arguments for hormones as contraceptives?

A

It can be more effective therefore more reliable than a condom

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

23
Q

Arguments against hormones as contraceptives?

A

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

It could have serious long term effects if used regularly

24
Q

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

A

IVF

In Vitro Fertilisation

25
Q

What hormones are given in IVF? Why?

A

FSH and LH

They burst and mature the eggs releasing more than one

26
Q

How is IVF completed?

A

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