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when you are working out and you are lifting a weight....
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoCalcium ions
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What ions are important in muscle contraction and impulse conduction as an action potential reaches a synapse?
Sodium & Calcium.At the synapse, or the motor end plate, acetylcholine opens sodium channels causing sodium influx into the muscle fiber causing depolarization.This depolarization causes calcium released from the sarcoplasmic reticulum that initiates muscle contraction by activating sarcomeres.
What is a concentric contraction?
concentric contraction is atype of muscle contraction which the muscle shortens while genrating aforce The muscle shortens to produce movement. A muscle contraction in which shortening occurs.
What factors affect muscle contraction?
the degree of muscle stretch is affect the strength or force of skeletal muscle contraction
What is a contraction in which the muscle shorten and work is done?
This is muscle flexion or isotonic contraction.
True or false When the contraction of a skeletal muscle is studied in the laboratory by applying an electrical charge to the muscle the contraction is called a muscle twitch.?
true
What is an important ion for muscle contraction?
calcium
What specific event initiates the contraction?
The specific event that initiates a muscle contraction is the release of calcium ions within the muscle cell. This triggers a series of chemical reactions that ultimately lead to the sliding of actin and myosin filaments, resulting in muscle contraction.
What is the ion necessary in cross bridging to produce a muscle contraction is?
calcium
Each heart contraction begins in a small group of cardiac muscle cells called?
The sinoatrial node is the small group of cardiac muscles that initiates each heart contraction.
What is the neurotransmitter that initiates muscle contraction?
Voluntary muscle contraction is controlled by the central nervous system. The brain sends signals, in the form of action potentials, through the nervous system to the motor neuron that innervates several muscle fibers.Acetylcholine (ACh) is commonly secreted at neuromuscular junctions, the gaps between motor neurons and muscle cells, where it stimulates muscles to contract (by opening gated positive ion channels).
Are sodium and potassium the final go signal in muscle contraction?
an increase in intracellular calcium ion levels
What inhibits muscular contraction?
Muscle fatigue has a number of causes including ion imbalance within the muscle or nervous fatigue. And most importantly, from the accumulation of lactic acid in the muscle.
Cross-bridge formation that results in muscle contraction requires intracellular?
the major intracellular ion in crossbridge formation is what
Which protein inhibits skeletal muscle contraction and what ion removes the inhibition?
Tropomyosin; calcium ions
What is muscle contraction without muscle shortening is what kind of contraction?
Isometric contraction
Constant contraction of a muscle is?
constant contraction of a muscle is called the muscle tone
What is the ion called that triggers muscle contractions?
There are several, but a calcium ion is one that is used in skeletal muscle contraction.
