Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology gcse > SB2g The Nervous System > Flashcards

SB2g The Nervous System Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards AP® Biology flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards Biology 101 flashcards
1
Q

What makes up the central nervous system (CNS)?

A

The brain and spinal cord

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

What makes up the nervous system?

A

Brain, spinal cord and nerves

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

What are impulses?

A

Electrical signals in the nervous system that the body uses to communicate

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

What is the sciatic nerve

A

The thickest nerve connecting the heel and the spinal cord

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

How long is the spinal cord in adults?

A

43 - 45 cm

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

What is the vertebra

A

24 bones which form the backbone and protect the spinal cord

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

What is a stimulus?

A

Anything your body is sensitive to and causes an electrical impulse

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

What are receptor cells?

A

Cells in sense organs like eyes and ears that receive the electrical impulse

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

What is a response?

A

Your reaction the the stimulus

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

In which sense organ would you find receptor cells that detect changes in light?

A

Eyes

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

What is neurotransmission?

A

The travelling or transmission of impulses

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

What do neurones have to carry impulses?

A

A cell body and long extensions

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

What is the function of a sensory neurone?

A

It’s function is to carry impulses from receptor cells toward the central nervous system

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

What is a dendrite?

A

A tiny branch in a neurones that receives impulses from receptor cells

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

What do axon terminals do?

A

Pass impulses to other neurones

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

What is the direction the impulse travels in a sensory neurone?

A

From the dendron to the axon

17
Q

What are the two extensions of a sensory neurone called?

A

Dendron and axon

18
Q

What is the pathway of a nerve impulse?

A
  1. Stimulus causes the impulse
  2. impulses detected at receptor cells
  3. passes along sensory neurone
  4. impulse travels to CNS
  5. Impulse passes along motor neurone
  6. effector receives impulse
  7. Response in triggered
19
Q

Why are dendrons and axons long?

A

To allow fast neurotransmissions over long distances

20
Q

What is the myelin sheath?

A

A fatter layer surrounding the dendron and axon

21
Q

What is the function of the myelin sheath?

A

to electrically insulate the neurone from neighbouring neurones to prevent energy loss in the signal, and speeds up neurotransmission by making the impulse jump along the cell between gaps in the myelin

Biology gcse (32 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions