What is measured in beats per minute and varies significantly throughout a person's life?

The correct response is that pulse ranges are measured in beats per minute and vary throughout a person's life. The pulse, which reflects the heart rate, indicates how many times the heart beats within one minute. This rate can fluctuate based on various factors such as age, fitness level, activity level, and overall health.

In infants, for example, the pulse rate is considerably higher, often ranging from 120 to 160 beats per minute, while in adults, a normal resting heart rate typically ranges from 60 to 100 beats per minute. Furthermore, the pulse can change with different activities; it increases during exercise and decreases during rest or sleep.

Blood pressure, on the other hand, is measured in millimeters of mercury (mmHg) and reflects the pressure in the arteries during heartbeats and between heartbeats, but does not directly relate to beats per minute. Heart sounds are the sounds made by the heart valves closing and opening, which are not measured in beats per minute, and temperature is measured in degrees and indicates body heat but does not relate to heart rate either.