A Reduction in Extracellular Ca²⁺ Levels Would Lead to

question 65

Multiple Choice

A reduction in extracellular Ca²⁺ levels would lead to

• A) increased force of cardiac muscle contraction due to increased interactions between actin and myosin.
• B) decreased force of cardiac muscle contraction due to a lack of release of Ca²⁺ from the sarcoplasmic reticulum.
• C) heart block due to depolarization of the sarcolemma.
• D) heart block due to hyperpolarization of the sarcolemma.

---

Definitions:

Diagnosed

The identification of the nature of an illness or other problem by examination of the symptoms.

Percent

A unit of measurement that represents one hundredth of a whole.

Stimulant

A class of drugs that increase the activity of the nervous system, resulting in increased alertness, attention, and energy.

ADHD

Attention Deficit Hyperactivity Disorder, a neurodevelopmental disorder characterized by difficulties with attention, impulsivity, and hyperactivity.