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The point of contact between the nerve and the muscle fibers it stimulates is called a:
What is a single nerve fiber that carries an impulse (action potential) to muscle fibers called?
The minimal level of stimulation required to cause a muscle fiber to contract is called:
a threshold stimulus.
When a muscle fiber is stimulated it will contract to its fullest ability. This is called:
the all-or-none law.
Name three overall effects of tonic contracture.
Counteract the pull of gravity
Maintains posture and upright position
During tonic contracture, the muscle is said to undo go what type of contraction?
If the prime mover flexes a joint, then the antagonist:
will relax. And also partially help control the movement.
What are the fluid-filled sacs that act as lubricating structures for reducing friction during muscle movement called?
Generally speaking, what happens to the Z-lines when muscle contraction occurs?
They are pulled closer together.
According to the sliding filament model, in order for a sarcomere to contract, what three things need to happen?
Calcium must be released from the endoplasmic reticulum
ATP must be broken down to release energy
Bridges must form between the actin and myosin myofilaments
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