Neuromuscular System

What carries electrical impulses from the central nervous system to our muscles?

• sensory neuron

• motor neurone

• proprioceptors

• motor unit

The impulse travels down a structure called the?

• Synaptic cleft

• Motor unit

• Axon

• Muscle fibre

What is the conduction of the nerve impulse know as?

• Action potential

• Axon

• Sensory neurone

• Synaptic cleft

What is secreted once the impulse arrives at the neuromuscular junction?

• Adrenaline

• Calcium

• Acetylcholine

• Carbon dioxide

What happens if the action potential reaches the threshold charge required?

• Non of the muscle fibres will contract

• All of the muscle fibres will contract

What is this none as?

• The all or nothing law

• The nothing or all law

• The law of muscular contraction

• The muscle fibres law

Motor units contain........

• The same types of muscle fibres

• Different types of muscle fibres

Factors that affect the strength of a musclular contraction.

• Colour and type

• Size and number

• Size and colour

• Type and length

When an impulse is repeatedly fired at a motor unit. This is called.......

• Spatial summation

• Wave sumamtion

When impulses are fired at different a motor units. This is called.......

• Spatial summation

• Wave sumamtion