2.1 Responding to Change Flashcards

1
Q

Where are the receptors found?

A

Sense organs

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2
Q

Name 5 sense organs

A

Eye, ear, tongue, skin, nose

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3
Q

What do your skin receptors react to?

A

Touch, pressure, temperature, pain

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4
Q

What do your tongue receptors react to?

A

Chemicals in food and drink

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5
Q

What do your nose receptors react to?

A

Chemicals in the air

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6
Q

What do your eye receptors react to?

A

Light

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7
Q

What do your ear receptors react to?

A

Sound, position of head

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8
Q

How does the brain react to stimulants?

A

Light stimulates receptors in your eye and electrical impulses then pass to the brain song neurons

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9
Q

What are neurons?

A

Nerve cells

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10
Q

What stimuli are detected by the sense organs?

A

Light, chemical, touch, pain, temperature, sound etc

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11
Q

What two components form the central nervous system (CNS)?

A

The brain and the spinal cord

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12
Q

What do sensory neurones do?

A

Carry impulses from receptors to the CNS

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13
Q

Where are neurones found?

A

In our nerves

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14
Q

What do motor neurones do?

A

Carry impulses from the CNS to effector organs

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15
Q

What are effector organs?

A

Muscles or glands that change due to the stimuli detected by the receptors

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16
Q

How do muscles respond as effector organs?

A

They contract

17
Q

How do glands respond as effector organs?

A

The secrete (release) chemicals

18
Q

How do impulses pass from the receptor to the effector organs?

A
  1. Receptor detects stimuli
  2. Electrical impulses pass from receptor to CNS via sensory neurones
  3. Electrical impulses pass from CNS to effector organs via motor neurones
19
Q

What does the nervous system allow humans to do?

A

React to their surroundings and coordinates behaviour

20
Q

What do receptors detect?

A

External stimuli

21
Q

What part of the nervous system detects stimuli?

A

Receptors