B3.1.1 - Nervous System Flashcards

1
Q

How does your nervous system work?

A

By detecting changes in your external environment and sending this information to your brain where it is processed and an appropriate response is created

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the change of environment in the nervous system?

A

Stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the groups of cells that detect the stimulus?

A

Sensory receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the response in a nervous system caused by?

A

Effectors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are effectors?

A

Muscles or glands - muscles respond to an impulse by contracting, while glands react by releasing hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where are your receptor cells found?

A

In your sense organs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Do all receptors detect all stimuli?

A

No, different receptors detect different stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What do receptors do?

A

They change the stimulus into electrical impulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where do the electric impulses made by the receptors travel to?

A

The central nervous system (CNS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does CNS stand for?

A

The central nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the CNS made up of?

A

The brain and the spinal cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What would receptor cells be for skin?

A

Pressure and temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What would receptor cells be for a nose?

A

Smell and taste

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What would the stimulus be for a tongue?

A

Chemical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the 3 different types of neurones?

A

Relay, sensory and motor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What do sensory neurones do?

A

Carry electrical impulses from receptor cells to the CNS

17
Q

What do relay neurones do?

A

Carry electrical impulses from sensory neurones to motor neurones

18
Q

What do motor neurones do?

A

Carry electrical impulses from the CNS to effectors

19
Q

What are nerves?

A

Bundles of hundreds or thousands of neurones

20
Q

What is the direction of impulse in a sensory neurone?

A

Left to right

21
Q

What is the direction of impulse in a relay neurone?

A

Dendrites to axon

22
Q

What is the direction of impulse in a motor neurone?

A

Left to right

23
Q

What are the steps involved in a coordinated nervous reaction?

A

Stimulus -> Receptor Cells -> Sensory Neurone -> Spinal Cord -> Brain -> Spinal Cord -> Motor Neurone -> Effector -> Response

24
Q

How long does a coordinated nervous reaction last?

A

0.7 seconds