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Muscle Contration Quiz (A Level)

A Level PE Applied Anatomy & Physiology Neuromuscular System Muscle Contration Quiz (A Level)

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Question 1 of 10

1. Question
What is a motor unit?
- A motor neurone and its muscle fibres
- Nerve cells which transmit the brain's instructions as electrical impulses to the muscles
- Where the motor neruone and muscle fibre meet
- Helps to motivate you during fatigue
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Question 2 of 10

2. Question
What is a motor neurone?
- A motor neurone and its muscle fibres
- Nerve cells which transmit the brain's instructions as electrical impulses to the muscles
- Where the motor neruone and muscle fibre meet
- Helps to motivate you during fatigue
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Question 3 of 10

3. Question
Muscle spindles ..
- Detect how far and fast a muscle is being stretched and produce the stretch reflex
- Activated when there is tension in a muscle.
- When there is tension in a muscle but no visible movement
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Question 4 of 10

4. Question
Muscle spindles prevent?
- Over stretching and reduce the risk of injury
- Initiate autogenic inhibition
- Enable isometric contractions to occur
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Question 5 of 10

5. Question
What is C-R-A-C?
- Contract, relax, antagonist, contract
- Initiate autogenic inhibition
- Enable isometric contractions to occur
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Question 6 of 10

6. Question
Golgi tendon organs…
- Detect how far and fast a muscle is being stretched and produce the stretch reflex
- Activated when there is tension in a muscle.
- When there is tension in a muscle but no visible movement
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Question 7 of 10

7. Question
The all or none law states that…
- Either all muscle fibres contract or none do, minimum threshold of stimulation must be reached
- Strength of contraction changes by altering the number and size of the muscle's motor units
- A sustained muscle contraction caused by a series of fastv repeating stimuli
- A group of fast and slow twitch fibres contracting at different rates
Correct

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Question 8 of 10

8. Question
Autogenic inhibition is
- A sudden relaxation of the muscle in response to high tension, receptors are the GTO's
- Detect how far and fast a muscle is being stretched and produce the stretch reflex
- Contract, relax, agonist, contract
- Detect how far and fast a muscle is being stretched and produce the stretch reflex
Correct

Incorrect
Question 9 of 10

9. Question
What is wave summation?
- Either all muscle fibres contract or none do, minimum threshold of stimulation must be reached
- Strength of contraction changes by altering the number and size of the muscle's motor units
- Repeated nerve impulse with no time to relax so a smooth sustained contraction occurs, rather than twitches
- A group of fast and slow twitch fibres contracting at different rates
Correct

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Question 10 of 10

10. Question
Either all muscle fibres contract or none do, minimum threshold of stimulation must be reached
- Either all muscle fibres contract or none do, minimum threshold of stimulation must be reached
- Strength of contraction changes by altering the number and size of the muscle's motor units
- A sustained muscle contraction caused by a series of fastv repeating stimuli
- A group of fast and slow twitch fibres contracting at different rates
Correct

Incorrect

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