Coordination And Control Flashcards

1
Q

Where are receptors found?

A

Sense organs

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2
Q

What are some stimuli?

A

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

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3
Q

How does the message from the receptors reach the brain?

A

Electrical impulses that pass along neutrons

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4
Q

What are the sense organs?

A

Eye, ear,nose, tongue, skin

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5
Q

What do the brain and spinal cord form?

A

Central nervous system

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6
Q

What do nerves contain?

A

Neutrons

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7
Q

What are neurons?

A

Nerve cells which are found in nerves

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8
Q

What do motor neurone do?

A

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

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9
Q

What are the steps involved in a reflex action?

A
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
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10
Q

What is in the junction between two neurons?

A

A synapse

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11
Q

Describe what happens at a synapse when an impulse arrives.

A

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

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12
Q

Where if FSH produced?

A

Pituitary gland

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13
Q

What does FSH do?

A

Causes eggs to mature

Causes Oestrogen to be produced

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14
Q

Where is oestrogen produced?

A

Ovaries

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15
Q

What does oestrogen do?

A

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

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16
Q

Where is LH produced?

A

Pituitary gland

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17
Q

What does LH do?

A

Stimulates the mature egg to be released from the ovary

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18
Q

What will the contraceptive pill contain?

A

Oestrogen and progesterone

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19
Q

What is good about progesterone-only pills?

A

Fewer side effects

20
Q

How does the contraceptive pill stop pregnancy?

A

Prevents the production of FSH so no eggs mature

21
Q

What does fertility treatment entail?

A

Women who cannot produce mature eggs being given FSH and LH

22
Q

FSH causes…

A

Eggs to mature

23
Q

LH stimulates ……..

A

Ovulation

24
Q

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

A

FSH

25
Q

What are the advantages of fertility treatments?

A

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

26
Q

Disadvantages of fertility treatments

A

Pill causes side effects
Objections due to religion
IVF expensive

27
Q

The nervous system has…

A

Receptors to detect stimuli

28
Q

What internal conditions does the body careful control?

A

Water content
Ion content
Temperature
Blood sugar level

29
Q

How does water leave the body?

A

Sweat
Breathed out
Urine

30
Q

What is urine produced by?

A

Kidneys

31
Q

How does the body lose ions?

A

Sweat

Urine

32
Q

Why must our body temperature be kept constant?

A

So our enzymes can work properly

33
Q

What controls the sugar levels?

A

The pancreas

34
Q

What are plants sensitive to?

A

Light
Gravity
Moisture

35
Q

What is a phototropism response?

A

When plants grow towards the light

36
Q

What is a gravitropic response?

A

When the roots grow down towards gravity

37
Q

Where will roots also grow towards?

A

Water

38
Q

What is auxin?

A

The hormone that controls phototropism and gravitotropism

39
Q

What does unequal distribution of auxin cause?

A

Unequal growth; resulting in bending the shoots or roots

40
Q

What can plant growth hormones be used as?

A

Weed killers and stimulate root growth

41
Q

What are the benefits of women taking hormones?

A

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

42
Q

What is a disadvantage of taking hormones?

A

Side effects

43
Q

What doe weed killers do?

A

Kill unwanted plants

44
Q

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

A

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

45
Q

What do some hormones encourage?

A

Encourages fruit to ripen

46
Q

Why is it important to use plant hormones correctly?

A

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