What is happening in the heart when a P wave is recorded on an ECG?
A. The ventricles are depolarizing.
B. The atria are depolarizing.
C. The ventricles are repolarizing.
D. The ventricles are contracting.
E. Ventricular systole is occurring.
B. The atria are depolarizing.
Anatomy & Physiology
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Molecules that attract immune cells are known as _________.
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Anatomy & Physiology
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What will be an ideal response?
Anatomy & Physiology
________ are the functional units of nerve tissue.
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Anatomy & Physiology