A Patient's ECG Was Abnormal and the Physician Determined That

question 5

Multiple Choice

A patient's ECG was abnormal and the physician determined that a pacemaker was necessary Which of the following best describes the normal electrical functioning of the heart?

• A)Electrical activity is initiated by the SA node and depolarization is carried from the ventricle by the AV node.
• B)Electrical activity is initiated by the AV node and depolarization is carried from the atria by the SA node.
• C)As the resting membrane potential decreases the SA node will reach its depolarization threshold.
• D)As the resting membrane potential increases the AV node will reach its depolarization threshold.

Grasp the effects of alcohol consumption in the last trimester of pregnancy on fetal health.

Analyze the factors contributing to infant mortality rates in different birth settings.

Understand the long-term effects of prenatal cocaine exposure on child development.

Evaluate trends and factors in newborn health assessments, such as Apgar scores, in recent years.

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Definitions:

Parents

The caregivers of offspring in their own species; in humans, typically refers to a child's biological or adoptive mother and father.

Extinction

in psychology, refers to the gradual disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.

Resistance To Extinction

The persistence of learned behavior or response even after the original stimulus (e.g., reinforcement) is no longer present.

Spontaneous Recovery

The reappearance of a previously extinguished conditioned response after a period of time without exposure to the conditioned stimulus.