In an EKG, the P wave is generated when the
A. ventricles depolarize.
B. atria depolarize.
C. atria repolarize.
D. ventricles repolarize.
E. Purkinje fibers initiate an impulse.
B
Anatomy & Physiology
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A nucleotide that RNA uses but DNA does not is ________.
A. cytocine B. thymine C. adenine D. uracil
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The net pressure gradient in the cardiovascular system is created by _____.
A. Blood viscosity B. Heart contraction C. Vasoconstriction D. Vasodilation
Anatomy & Physiology
To allow for flexion, the __________ unlocks the knee joint.
A. biceps femoris B. semimembranosus C. popliteus D. sartorius
Anatomy & Physiology