Describe and explain the fluctuations in the arterial pulse during the day and depending on the activity of the body.

A normal heart rate would be 60 to 80 beats per minute at rest. Any actions – running, brisk walking and other physical activity are naturally accompanied by a more frequent pulse. This is necessary in order for the muscles to receive more blood. At night, if a person is asleep, the pulse drops to 50 or less per minute. This is due to the influence of the vagus nerve – the vagus. In a dream, a person is motionless, does not perform mental and physical activity, therefore, such a rare heartbeat is enough for the body.