Stroke volume is the blood pumped by the left ventricle each time it contracts. During a training run the stroke volume of a person is 0.1 dm^3 (100 cm^3). Calculate the pulse rate at an oxygen uptake of 2 dm^3/min.
Is there enough information (there is a graph that comes with the question, but I don't think it helps)? How do you calculate the pulse rate?
To calculate the pulse rate, we need two pieces of information: the stroke volume and the oxygen uptake. Unfortunately, the given information does not include the stroke volume at an oxygen uptake of 2 dm³/min, which means we do not have enough information to directly calculate the pulse rate. The graph mentioned might provide additional information to establish a relationship between the stroke volume and oxygen uptake, but without that graph, we cannot determine the pulse rate.
However, if we assume that the stroke volume remains constant regardless of the oxygen uptake, we can calculate an estimated pulse rate.
To do so, we'll need to use the formula for cardiac output (the volume of blood pumped by the heart per minute) which is the product of stroke volume and heart rate:
Cardiac Output = Stroke Volume × Heart Rate
If we rearrange the formula to solve for heart rate, we get:
Heart Rate = Cardiac Output / Stroke Volume
Now, given that the stroke volume is 0.1 dm³ and the oxygen uptake is 2 dm³/min, we can use these values to obtain the pulse rate estimate.
Pulse Rate = 2 dm³/min (Oxygen Uptake) / 0.1 dm³ (Stroke Volume) = 20 beats/min
So, based on these assumptions, the estimated pulse rate would be 20 beats per minute. However, please note that this calculation is only an estimate and may not accurately represent the actual pulse rate without further information.