Category: Cardiovascular system

A. Increases heart rate
B. Decreases myocardial irritability
C. Increases force of contraction
D. Increases oxygen uptake by heart

A. Cardiac efficiency
B. Cardiac index
C. Mean stroke volume
D. Mean arterial pressure

A. 0.4 seconds
B. 0.8 seconds
C. 1.2 seconds
D. 1.6 seconds

A. Measures the change in Po2 in arterial blood
B. Measures Po2 in venous blood
C. Measures the changed in CO2 in arterial blood
D. Measures the change in CO2 in venous blood

A. Reflex hyperpnea
B. Reflex Hypercapnia
C. Reflex tachycardia
D. Reflex Hypercapnia

A. Closure of the aortic and pulmonary valves
B. Opening of the aortic and pulmonary valves
C. Closure of the mitral and tricuspid valves
D. Opening of the mitral and tricuspid valves

A. Systolic ejection
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. None of the above

A. Increase in heart rate
B. Decreased vagal discharge
C. Increased sympathetic discharge
D. Decrease in blood pressure

A. Due to closure of semilunar valves
B. Is occasionally split
C. Has longer duration than 1st heart sound
D. Marks the onset of diastole

A. Lasts till cardiac contraction
B. Longer than refractory period in skeletal muscle
C. A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus
D. Corresponds with duration of action potential
E. All of the above