Reduced levels of blood Ca 2+

Reduced levels of blood Ca 2+ decrease both heart rate and contraction strength because calcium ions are crucial for muscle contraction, including the heart muscle. Low calcium levels can impair the heart's ability to contract effectively and reduce the rate of electrical conduction, leading to a slower heart rate.

Reduced levels of blood Ca 2+

Reduced levels of blood Ca 2+ decrease both heart rate and contraction strength because calcium ions are crucial for muscle contraction, including the heart muscle. Low calcium levels can impair the heart's ability to contract effectively and reduce the rate of electrical conduction, leading to a slower heart rate.

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Reduced Levels of Blood Ca²⁺

Question 59

Multiple Choice

Reduced levels of blood Ca²⁺

A) increase heart rate but do not affect heart contraction strength.
B) decrease both heart rate and contraction strength.
C) decrease heart rate but do not affect heart contraction strength.
D) increase both heart rate and contraction strength.

Correct Answer: