The ________ is a small aggregation of specialized cardiac muscle tissue that acts as a pacemaker and initiates the heartbeat.
A) cardiac plexus
B) angina pectoris
C) bundle of His
D) atrioventricular node
E) sinoatrial node
Correct Answer:
Verified
Q29: Spasm of smooth muscle in the bronchial
Q30: The mitral valve is the _ valve.
A)
Q31: The primary function of the cardiac sphincter
Q32: A stethoscope placed at the right sternal
Q33: T lymphocytes are produced in the _.
A)
Q34: Which is the correct description of a
Q35: The vein that drains the upper limbs,
Q36: The pumping chamber of the heart that
Q37: The _ nervous system can modify the
Q39: The _ is a tubelike portion of
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