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AQA CORE BIOLOGY > The Nervous System > Flashcards

The Nervous System Flashcards

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1
Q

What is a stimulus?

A

A change in environment which you may react to

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2
Q

What are the 5 sense organs?

A 
Eyes
Ears 
Nose
Tongue
Skin
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3
Q

What are receptors?

A

Groups of cells which are sensitive to a stimulus

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4
Q

What do sense organs contain?

A

Receptors

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5
Q

What do receptors do?

A

They change stimulus energy into electrical impulses

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6
Q

What can a stimulus be?

A 
Light
Sound
Touch
Pressure
Pain
Chemical
Change in position or temperature
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7
Q

What receptor does eyes contain?

A

Light

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8
Q

What receptor does ears contain?

A

Sound

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9
Q

What receptor does your nose contain?

A

Smell

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10
Q

What receptor does your tongue contain?

A

Taste

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11
Q

What are light receptors sensitive to?

A

Light

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12
Q

What are sound receptors sensitive to?

A

Sound

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13
Q

What are smell receptors sensitive to?

A

A chemical stimuli

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14
Q

What are taste receptors sensitive to?

A 
Bitter
Salt
Sweet
Sour
Savoury 
A chemical stimuli
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15
Q

What is skin sensitive to?

A

Touch
Pressure
Pain
Temperature change

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16
Q

What is a sensory neurone?

A

The nerve cell that carry signals as electrical impulses from the receptors in the sense organs to the central nervous stystem

17
Q

What is a relay neurone?

A

The nerve cells that carry signals from sensory neurones to motor neurones

18
Q

What is the motor neurone?

A

The nerve cells that carry signals from the central nervous system to the effector

19
Q

What are effectors?

A

Muscles

Glands

20
Q

How does a muscle respond?

A

Contracts

21
Q

How does a gland respond?

A

Secretes hormones

22
Q

What is the central nervous system?

A

Where all the information from the sense organs are sent

Where reflexes and actions are coordinated

23
Q

What does the central nervous system consist of?

A

The brain

Spinal cord

24
Q

What do neurones do?

A

Transmit the information as electrical impulses quickly to and from the CNS

25
Q

What are neurones?

A

Nerve cells

26
Q

What is sent to the effectors?

A

Instructions from the CNS

AQA CORE BIOLOGY (28 decks)

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