The P wave of the electrocardiogram is a signal from

A) depolarization of the SA node.
B) depolarization of the AV node.
C) depolarization of the atria.
D) repolarization of the atria.
E) depolarization of the ventricles.


Answer: C

Anatomy & Physiology

You might also like to view...

Ionic compounds dissociate in water into:

A) electrolytes. B) acids and bases. C) polar and nonpolar substances. D) hydrophilic and hydrophobic substances.

Anatomy & Physiology

What is the difference between parallel and convergent evolution?

What will be an ideal response?

Anatomy & Physiology

Rib 1 articulates with vertebra ______ and the ______

A.  T1; body of the sternum B.  T2; body of the sternum C.  T1; manubrium of the sternum D.  C7; manubrium of the sternum E.   T2; clavicle

Anatomy & Physiology

Why are injections administered in the hypodermis when administering drugs using a hypodermic needle?

A) There is an abundance of capillaries in the hypodermis. B) The hypodermis is highly innervated. C) Since it is vascularized, the hypodermis can absorb a lot of fluid. D) Both elastic fibers and collagen fibers are present. E) The presence of blood vessels and lymphatic vessels help local tissues defend and repair themselves.

Anatomy & Physiology