ATI RN
ATI Advanced Pharmacology Final Exam I Questions
Extract:
Question 1 of 5
The nurse is teaching a class on muscular coordination and explains it is the movement of what electrolyte that contributes to the process of muscle contraction and relaxation?
Correct Answer: C
Rationale: The correct answer is C: Calcium. Calcium plays a crucial role in muscle contraction and relaxation. During muscle contraction, calcium ions bind to proteins in muscle fibers, allowing the actin and myosin filaments to slide past each other. This sliding action is what causes muscle contraction. When muscle relaxation is needed, calcium ions are pumped back into storage within the muscle cells, leading to relaxation. Magnesium (
A), chloride (
B), and hydrogen (
D) do not directly influence muscle contraction and relaxation like calcium does.
Question 2 of 5
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Question 3 of 5
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Question 4 of 5
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Question 5 of 5
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