Membrane Potential Changes in an Isolated Cardiac Muscle Cell Are

question 170

Multiple Choice

Membrane potential changes in an isolated cardiac muscle cell are recorded along with ion movements across the cell membrane (see graph below) . Which of the following ion sequences corresponds to regions 1-2-3 on the graph, respectively?

• A)Potassium, sodium, calcium
• B)Sodium, calcium, potassium
• C)Calcium, sodium, chloride
• D)Calcium, sodium, potassium
• E)Sodium, potassium, calcium

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Definitions:

Activation

The process of initiating or triggering a response or action, especially in the context of physiological or psychological functions.

Intensity

The degree of strength, force, or concentration of something, often used in contexts of light, sound, or emotions.

Motivation

The internal and external factors that stimulate desire and energy in people to be continually interested and committed to a job, role, or subject, or to make an effort to attain a goal.

Intrinsic Motivation

The drive to engage in an activity for its own sake, due to the inherent pleasure and satisfaction derived from the activity itself.