Cardiovascular system

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

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

A. Isotonic relaxation
B. Isovolumetric relaxation
C. Isovolumetric contraction
D. Isotonic contraction

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

A. 2.5
B. 4.25
C. 5.25
D. 9.5

A. AV node
B. SA node
C. SA node
D. Purkinje fibers

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

A. Hyperplasia
B. Hypertrophy
C. Fatty infiltration
D. Increased amounts of fibrous connective tissue

A. Aorta
B. Artery
C. Arteriole
D. Vein

A. Does not operate in the failing heart
B. Does not operate during exercise
C. Explains the increase in cardiac output that occurs when venous return is increased
D. Explains the increase in cardiac output when the sympathetic nerves supplying the heart stimulated