Which of These Statements Correctly Describes the Refractory Period of Cardiac

question 136

Multiple Choice

Which of these statements correctly describes 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:

Hypothalamus

A region of the brain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.

Amygdala

A region of the brain within the temporal lobe, crucial for the processing of emotions, especially fear and pleasure.

Temporal Lobes

Regions of the cerebral cortex below the parietal lobes and in front of the occipital lobes; these regions are important for hearing and for recognizing objects, such as faces.

Cerebral Cortex

The outer layer of the brain, responsible for complex behaviors, thought, memory, and consciousness.