Coordination And Control

Question 1

Where are receptors found?

Answer 1

Sense organs

Question 2

What are some stimuli?

Answer 2

Sound, chemicals, temperature changes, touch, pain and light

Question 3

How does the message from the receptors reach the brain?

Answer 3

Electrical impulses that pass along neutrons

Question 4

What are the sense organs?

Answer 4

Eye, ear,nose, tongue, skin

Question 5

What do the brain and spinal cord form?

Answer 5

Central nervous system

Question 6

What do nerves contain?

Answer 6

Neutrons

Question 7

What are neurons?

Answer 7

Nerve cells which are found in nerves

Question 8

What do motor neurone do?

Answer 8

Carry impulses from the CNS to effector organs which may be muscles or glands which respond by contracting or the glands respond by secreting chemicals

Question 9

What are the steps involved in a reflex action?

Answer 9

A receptor detects a stimulus 
A sensory neurone transmits the impulse to the CNS 
A relay neurone passes the impulse on 
A motor neuron is stimulated 
The impulse passes to an effector
Action is taken

Question 10

What is in the junction between two neurons?

Answer 10

A synapse

Question 11

Describe what happens at a synapse when an impulse arrives.

Answer 11

impulse / information passes from one neurone to another
or impulse / information passes across gap
• chemical / transmitter involved
• diffusion (across gap)

Question 12

Where if FSH produced?

Answer 12

Pituitary gland

Question 13

What does FSH do?

Answer 13

Causes eggs to mature

Causes Oestrogen to be produced

Question 14

Where is oestrogen produced?

Answer 14

Ovaries

Question 15

What does oestrogen do?

Answer 15

Inhibits further FSH production and stimulates LH production and stimulates the womb lining to receive the fertilised egg

Question 16

Where is LH produced?

Answer 16

Pituitary gland

Question 17

What does LH do?

Answer 17

Stimulates the mature egg to be released from the ovary

Question 18

What will the contraceptive pill contain?

Answer 18

Oestrogen and progesterone

Question 19

What is good about progesterone-only pills?

Answer 19

Fewer side effects

Question 20

How does the contraceptive pill stop pregnancy?

Answer 20

Prevents the production of FSH so no eggs mature

Question 21

What does fertility treatment entail?

Answer 21

Women who cannot produce mature eggs being given FSH and LH

Question 22

FSH causes…

Answer 22

Eggs to mature

Question 23

LH stimulates ……..

Answer 23

Ovulation

Question 24

Which hormone is inhibited by the contraceptive pill but is given in fertility treatments?

Answer 24

FSH

Question 25

What are the advantages of fertility treatments?

Answer 25

Help reduce family sizes which reduces poverty in some areas Allows women to plan pregnancies Fertility drugs help infertile couples who are having IVF IVf helps coup,Es to have a baby

Question 26

Disadvantages of fertility treatments

Answer 26

Pill causes side effects Objections due to religion IVF expensive

Question 27

The nervous system has...

Answer 27

Receptors to detect stimuli

Question 28

What internal conditions does the body careful control?

Answer 28

Water content Ion content Temperature Blood sugar level

Question 29

How does water leave the body?

Answer 29

Sweat Breathed out Urine

Question 30

What is urine produced by?

Answer 30

Kidneys

Question 31

How does the body lose ions?

Answer 31

Sweat | Urine

Question 32

Why must our body temperature be kept constant?

Answer 32

So our enzymes can work properly

Question 33

What controls the sugar levels?

Answer 33

The pancreas

Question 34

What are plants sensitive to?

Answer 34

Light Gravity Moisture

Question 35

What is a phototropism response?

Answer 35

When plants grow towards the light

Question 36

What is a gravitropic response?

Answer 36

When the roots grow down towards gravity

Question 37

Where will roots also grow towards?

Answer 37

Water

Question 38

What is auxin?

Answer 38

The hormone that controls phototropism and gravitotropism

Question 39

What does unequal distribution of auxin cause?

Answer 39

Unequal growth; resulting in bending the shoots or roots

Question 40

What can plant growth hormones be used as?

Answer 40

Weed killers and stimulate root growth

Question 41

What are the benefits of women taking hormones?

Answer 41

They can prevent unwanted pregnancies so can plan when they want babies Or It may help them become pregnant, especially older women

Question 42

What is a disadvantage of taking hormones?

Answer 42

Side effects

Question 43

What doe weed killers do?

Answer 43

Kill unwanted plants

Question 44

What happens when cutting are taken from plants and plant growth hormones are added?

Answer 44

The hormone used encourage roots to grow before the cutting is planted

Question 45

What do some hormones encourage?

Answer 45

Encourages fruit to ripen

Question 46

Why is it important to use plant hormones correctly?

Answer 46

The can cause damage to the environment, weedkillers may kill useful plants