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What else can I help you with?
what's an isometric contraction?
An isometric contraction is when the muscle does not shorten and no movement results.
Excitation-contraction coupling refers especially to the means by which do what?
means by which electrical excitation of a muscle results in muscle contraction
What kind of muscle contraction is also referred to as static tension?
isometric
What is a stimulus that results in no perceptible contraction?
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.
What is the difference between a strong muscle contraction and a weak muscle contraction?
one would be the amount of contractile strength that results from a muscle contraction.
The alternating contraction and relaxation of opposing layers of smooth muscle is referred to as?
Peristalsis
What chemicals aid in the contraction of muscles?
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.
When myosin cross bridges bind to actin what happens?
Muscle contraction results
What myofilament does the pulling?
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.
What happens to the origin and insertion of a muscle during 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.
In the sliding filament mechanism the thin filament is being pulled toward the?
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?
constant contraction of a muscle is called the muscle tone
