What is the P wave?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

What is the P wave?

Explanation:
The P wave shows atrial depolarization, the electrical activation of the atria that triggers atrial contraction. It starts in the SA node and spreads across the atrial muscle, causing the atria to depolarize and then contract to push blood into the ventricles. This electrical event comes before ventricular activity, which is the QRS complex for ventricular contraction and the T wave for ventricular relaxation. Atrial repolarization does occur, but it happens during the QRS complex and isn’t seen as a separate wave. So the P wave best matches the atria depolarizing that leads to atrial contraction.

The P wave shows atrial depolarization, the electrical activation of the atria that triggers atrial contraction. It starts in the SA node and spreads across the atrial muscle, causing the atria to depolarize and then contract to push blood into the ventricles. This electrical event comes before ventricular activity, which is the QRS complex for ventricular contraction and the T wave for ventricular relaxation. Atrial repolarization does occur, but it happens during the QRS complex and isn’t seen as a separate wave. So the P wave best matches the atria depolarizing that leads to atrial contraction.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy