What is the neuromuscular junction?
Muscle Contraction

Flashcard
•
Science
•
11th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
The region where a motor neuron comes in close contact with a muscle cell, facilitating communication between the nervous system and muscle fibers.
2.
FLASHCARD QUESTION
Front
What does the all-or-none response mean in muscle contraction?
Back
It means that when a muscle fiber contracts, it contracts completely; there is no partial contraction.
3.
FLASHCARD QUESTION
Front
What causes an action potential in muscle cells?
Back
The imbalance of sodium (Na+) and potassium (K+) ions across the cell membrane.
4.
FLASHCARD QUESTION
Front
What two chemicals are necessary for muscle contraction to occur?
Back
Calcium and ATP (adenosine triphosphate) are essential for muscle contraction.
5.
FLASHCARD QUESTION
Front
What is the function of the sarcoplasmic reticulum?
Back
It stores calcium ions in the muscle cell, which are released during muscle contraction.
6.
FLASHCARD QUESTION
Front
Define muscle tension.
Back
The force generated by muscle fibers when they contract.
7.
FLASHCARD QUESTION
Front
What role does ATP play in muscle contraction?
Back
ATP provides the energy required for muscle contraction and relaxation.
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