CRAT EXAM | QUESTIONS & ANSWERS
(VERIFIED) | LATEST UPDATE | GRADED
A+
Chronotropic
Correct Answer: heart rate
Inotropic
Correct Answer: force of myocardial contractility
Dromotropic
Correct Answer: conduction velocity through the AV node
Systole
Correct Answer: contraction of chamber, blood is being ejected. Pressure rises
during systole.
Diastole
Correct Answer: rest, relaxation of chamber, chamber is allowed to fill. Pressure
falls during diastole.
Stroke Volume
Correct Answer: the amount of blood left ventricle pumps in each beat. (mL/beat)
1
, Cardiac output- definition
Correct Answer: The amount of blood pumped into the aorta each minute. (units=
mL/min)
Cardiac output- equation
Correct Answer: (HR) X (Stroke Volume) Avg. healthy adult= 4-8 L/min
Venous return
Correct Answer: amount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition
Correct Answer: force exerted by the blood against the walls of the arteries as the
ventricles contract and relax
Blood pressure- equation
Correct Answer: (cardiac output) X (peripheral resistance) or you could put it
another way: (HR)(Stroke Volume)(Peripheral Resistance)
An increase in Potassium or decrease in Calcium cause the heart to be ____.
Correct Answer: flaccid, limp, dilated, lower HR
2
(VERIFIED) | LATEST UPDATE | GRADED
A+
Chronotropic
Correct Answer: heart rate
Inotropic
Correct Answer: force of myocardial contractility
Dromotropic
Correct Answer: conduction velocity through the AV node
Systole
Correct Answer: contraction of chamber, blood is being ejected. Pressure rises
during systole.
Diastole
Correct Answer: rest, relaxation of chamber, chamber is allowed to fill. Pressure
falls during diastole.
Stroke Volume
Correct Answer: the amount of blood left ventricle pumps in each beat. (mL/beat)
1
, Cardiac output- definition
Correct Answer: The amount of blood pumped into the aorta each minute. (units=
mL/min)
Cardiac output- equation
Correct Answer: (HR) X (Stroke Volume) Avg. healthy adult= 4-8 L/min
Venous return
Correct Answer: amount of blood flowing into the right heart from the systemic
ciruclation
Blood Pressure- definition
Correct Answer: force exerted by the blood against the walls of the arteries as the
ventricles contract and relax
Blood pressure- equation
Correct Answer: (cardiac output) X (peripheral resistance) or you could put it
another way: (HR)(Stroke Volume)(Peripheral Resistance)
An increase in Potassium or decrease in Calcium cause the heart to be ____.
Correct Answer: flaccid, limp, dilated, lower HR
2
