Stroke volume is defined as:

Stroke volume is defined as:

• A. The amount of blood per beat
• B. The amount of blood pumped out in one minute
• C. The pressure of circulating blood on the walls of blood vessels
• D. The need for extra oxygen after strenuous exercise

Answer: (A)

Stroke volume is the amount of blood ejected from the heart with each beat. It describes the volume per contraction, typically measured in millilitres per beat. This differs from cardiac output, which is the total volume pumped per minute and equals stroke volume multiplied by heart rate. It also isn’t about the pressure in the arteries (that’s blood pressure) or the body’s need for extra oxygen after exercise (that relates to oxygen uptake/recovery). So, the definition that fits is the amount of blood pumped out per beat.

Stroke volume is the amount of blood ejected from the heart with each beat. It describes the volume per contraction, typically measured in millilitres per beat. This differs from cardiac output, which is the total volume pumped per minute and equals stroke volume multiplied by heart rate. It also isn’t about the pressure in the arteries (that’s blood pressure) or the body’s need for extra oxygen after exercise (that relates to oxygen uptake/recovery). So, the definition that fits is the amount of blood pumped out per beat.