Muscle Contraction Quiz

_________ blocks the myosin cross bridge binding sites in relaxation.

The functional unit in a muscle cell that shortens during contraction.

The "key" ion required for muscle contraction.

The sarcoplasm reticulum releases________

A single nerve signal and muscle contraction is called a;

Acetylcholine is a;

Myelin is found on...

Motor neurons are also known as;

The "All or None Principle" applies to both nerves and muscle fibres.

The "withdrawal reflex" is a;