Motor Unit Flashcard

Front

What is the neuromuscular junction?

Back

Where the motor neurone and muscle fiber meet

Front

What is the function of motor neurones?

Back

To transmit the brain's instructions as electrical impulses to the muscles

Front

What is the role of muscle spindles?

Back

To sense the muscle stretching

Front

What happens when a motor neurone stimulates muscle fibers?

Back

Either all fibers contract or none contract

Front

What is the primary function of muscle fibers in a motor unit?

Back

To contract in response to nerve impulses

Front

How are muscle fibers grouped?

Back

Into motor units

Front

What type of motor units are recruited for low intensity activities?

Back

Slow twitch motor units

Front

What is tetanic contraction?

Back

A sustained muscle contraction

Front

What is spatial summation?

Back

Impulses received at the same time at different places

Front

What is the role of calcium in muscle contraction?

Back

It is released to allow muscle contraction