Match each term with its definition or description.
-"Pacemaker" of the heart
A)Systole
B)Diastole
C)Cardiac cycle
D)Stroke volume
E)Cardiac output
F)Sinoatrial node
G)Purkinje fiber
H)P wave
I)QRS complex
J)T wave

Question

Quizplus · Accepted Answer

The sinoatrial node is known as the "pacemaker" of the heart, as it is responsible for initiating the electrical impulses that stimulate cardiac muscle contraction.

Answer: C 
 The cardiac cycle refers to the sequence of events that occur during one heartbeat, including both systole (contraction) and diastole (relaxation) phases.

Answer: G 
 Purkinje fibers are specialized cardiac muscle fibers that help to rapidly spread electrical impulses through the ventricles, coordinating the timing of ventricular contraction.

Answer: D 
 Stroke volume refers to the amount of blood ejected from the left ventricle with each heartbeat.

Answer: E 
 Cardiac output refers to the volume of blood ejected from the heart per unit of time, and is calculated as the product of heart rate and stroke volume.

Answer: H 
 The P wave is a component of the electrocardiogram (ECG) that reflects the depolarization (contraction) of the atria.

Answer: I
 The QRS complex is a component of the ECG that reflects the depolarization (contraction) of the ventricles.

Answer: J 
 The T wave is a component of the ECG that reflects the repolarization (relaxation) of the ventricles.

Match Each Term with Its Definition or Description