ATI Advanced Pharmacology Final Exam I | Nurselytic

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ATI Advanced Pharmacology Final Exam I Questions

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Question 1 of 5

What electrolyte inactivates troponin and allows actin and myosin to form a bridge enabling fibers to contract?

Correct Answer: D

Rationale: The correct answer is D: Calcium. Calcium is the electrolyte that inactivates troponin, allowing actin and myosin to form a bridge for muscle contraction. Calcium binds to troponin, causing a conformational change that moves tropomyosin out of the way, exposing the binding sites on actin for myosin. Magnesium (
A) is important for muscle relaxation, not contraction. Sodium (
B) and Potassium (
C) are involved in action potential generation and propagation, not in the direct mechanism of muscle contraction.

Question 2 of 5

Correct Answer:

Rationale:

Question 3 of 5

Correct Answer:

Rationale:

Question 4 of 5

Correct Answer:

Rationale:

Question 5 of 5

Correct Answer:

Rationale:

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