vasoconstriction
An isometric contraction is when the muscle does not shorten and no movement results.
means by which electrical excitation of a muscle results in muscle contraction
isometric
A subthreshold stimulus is one that does not generate a strong enough signal to elicit a perceptible contraction in muscle fibers. It is below the threshold required to cause an action potential and result in muscle contraction.
one would be the amount of contractile strength that results from a muscle contraction.
Peristalsis
Calcium ions are the key chemicals involved in muscle contraction. When a muscle is stimulated, calcium is released from the sarcoplasmic reticulum within the muscle cell, leading to the sliding of actin and myosin filaments which results in muscle contraction. ATP is also required for the energy needed for muscle contraction.
Muscle contraction results
The myosin myofilament pulls on the actin myofilament during muscle contraction. This interaction, known as the sliding filament theory, results in the shortening of the sarcomere and muscle contraction.
During muscle contraction, the origin (the attachment point of the muscle that remains relatively fixed) and the insertion (the attachment point of the muscle that moves) move closer together. This results in the muscle shortening and causing movement at the joint.
M-line, causing overlap with the thick filament during muscle contraction. This results in the sarcomere shortening and overall muscle contraction.
constant contraction of a muscle is called the muscle tone