Question

question 61
cardiac output is directly influenced by
○ heart rate
○ vascular resistance
○ stroke volume
○ diastole
○ a and c

question 62
approximately how much blood is found in the body?
○ 15 liters
○.5 liters
○ 10 liters
○ 5 liters
○ 20 liters

Explanation:

• Question 61: Cardiac output is calculated as the product of heart rate and stroke volume ($\text{Cardiac Output}=\text{Heart Rate}\times\text{Stroke Volume}$). Vascular resistance affects blood pressure (through Ohm's law for the cardiovascular system, $\text{Blood Pressure}=\text{Cardiac Output}\times\text{Vascular Resistance}$), but not directly cardiac output. Diastole is a phase of the cardiac cycle related to the filling of the heart chambers, and it is not a direct determinant of cardiac output in the formula sense.
• Question 62: The average adult human body contains approximately 5 liters of blood. 15 liters and 20 liters are far too high. 0.5 liters is extremely low (less than a typical blood donation volume of about 0.5 liters, and the body has much more blood than just one donation - worth). 10 liters is also higher than the average.

Answer:

• Question 61: A and C.
• Question 62: 5 liters.