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In order for a muscle to contract, the brain sends a nerve impulse to the muscle it wants to contract. The nerve impulse triggers the potassium inside the muscle fiber cell to switch places with the calcium outside the cell wall, thereby feeding the cell and contracting the muscle. A second nerve impulse from the brain triggers the calcium to switch places with the potassium, releasing the contracted muscle.
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∙ 12y ago
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What does a muscle become when it contracts?
A muscle becomes shorter when it contracts.
When a muscle contracts how does its form change?
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
When one muscle contracts what happens to the opposing muscle?
When one muscle in a pair contracts the other expands.
When muscle contracts it is?
Flexion
When the muscle contracts it is?
Flexion
When a muscle contracts it?
shortens
When a muscle contracts?
shortens
Which muscles contracts when the leg is extended at the knee?
The muscle that contracts when the leg is extended at the knee is call the gastrocnemius muscle
What happens when the biceps muscle contracts?
When the bicep contracts the triceps relax
When one muscle contracts what dose the other muscle do?
Relaxes
When a muscle contracts how does actin and myosin get shorter?
When the muscle contracts, it gets shorter. When it relaxes, it gets longer.
What is the intersection of the muscle?
The site that undergoes most of the movement when a muscle contracts.
