Define depolarization,and Describe the Events That Follow It

question 74

Multiple Choice

Define depolarization,and describe the events that follow it.

• A)Depolarization is the when the inside of the cell becomes negative due to sodium ions rushing out.After depolarization,repolarization occurs when potassium ions rush into the cell causing the inside of the cell to become positive again.
• B)Depolarization is the when the inside of the cell becomes positive due to sodium ions rushing in.After depolarization,repolarization occurs when potassium ions rush out of the cell causing the inside of the cell to become negative again.
• C)Depolarization is the when the inside of the cell becomes negative due to potassium ions rushing out.After depolarization,repolarization occurs when sodium ions rush into the cell causing the inside of the cell to become positive again.
• D)Depolarization is the when the inside of the cell becomes positive due to potassium ions rushing in.After depolarization,repolarization occurs when sodium ions rush out of the cell causing the inside of the cell to become negative again.
• E)Depolarization is when the inside of the cell becomes neutral due to an equal amount of sodium ions entering the cell and potassium ions leaving the cell.

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Definitions:

Pressure Wave

A type of wave mechanism that occurs when a fluid or gas changes velocity, often seen in the circulatory system as a pulse.

Blood Volume

The total amount of blood circulating within an individual's vascular system.

Ventricular Systole

The phase of the heartbeat when the ventricles contract, pumping blood out of the heart and into the arteries.

Pulmonary Trunk

The main vessel transporting deoxygenated blood from the right ventricle of the heart to the lungs.