All or None law

Question 1

What is the definition of the “All or none law”

Answer 1

Depending on wether the stimulus meets a threshold,all muscles will give a complete contraction or no contraction at all.

Question 2

What is the first stage of the “All or none law”?

Answer 2

A nerve impulse is initiated in the motor neurone cell body

Question 3

What is the second stage of the “All or none law”?

Answer 3

Nerve impulse is conducted down the axon of the motor neuron by a nerve action potential to the synaptic cleft.

Question 4

What happens in the third stage of the “All or None law”?

Answer 4

Acetylcholine is secreted into the synaptic cleft and to conduct the impulse across the gap.

Question 5

What happens in the fourth stage of the “All or None law”

Answer 5

If the electrical charge meets a certain threshold the muscle fibre will contract

Question 6

What’s the final stage of the “All or None law”?

Answer 6

This happens in an “ All or none” fashion.