Which of These Statements Refers to the Refractory Period of Cardiac

question 251

Multiple Choice

Which of these statements refers to the refractory period of cardiac muscle

• A)It lasts longer than the contraction period.
• B)It is much longer than the refractory period in skeletal muscle.
• C)It allows tetanic contraction of the heart to occur to ensure smooth, coordinated ejection of blood from the ventricles.
• D)It lasts longer than the relaxation period.

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Definitions:

Allergy

A condition in which the immune system reacts abnormally to a foreign substance.

Interstitial Fluid

Fluid found between tissue cells that is absorbed by lymphatic capillaries to become lymph.

Viral Infection

An illness caused by viruses, microscopic infectious agents that replicate inside living cells of organisms.

Saliva

A watery fluid secreted into the mouth by glands, providing lubrication for chewing and swallowing, and aiding in digestion.