What Does the PR Interval Viewed on a Normal Electrocardiogram

question 21

Multiple Choice

What does the PR interval viewed on a normal electrocardiogram represent?

• A) Atrial depolarization
• B) Ventricular depolarization
• C) The onset of atrial activation to onset of ventricular activity
• D) The "electrical systole" of the ventricles

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Definitions:

Gametophyte

The phase in plants and algae's life cycle that generates gametes via mitosis, associated with reproduction.

Bud

An undeveloped shoot that develops into flowers, stems, or leaves. Buds are enclosed in bud scales; see Axillary Bud and Terminal Bud.

Coevolution

The reciprocal adaptation of two or more species that occurs as a result of their close interactions over a long period.

Bat-pollinated

Refers to plants that are primarily pollinated by bats, a process crucial for the reproductive success of certain plant species.