Question

The relationship between the heartbeat and the pulse rate is
A. One heartbeat generate two pulse
B. Two heart beat generate one pulse
C. One heartbeat generate one pulse
D. One heartbeat generate three pulse

Answer 1

Hint:- The main function of the heart is to pump the blood to different body parts. It is done as the chambers of the heart contract and relax sequentially. Contraction of both atria followed by both ventricles constitute one cardiac cycle. Contraction of the left ventricle pumps the blood into arteries.

Complete step-by-step solution:-
The heart is the muscular organ of the cardiovascular system and consists of four chambers called atria and ventricles. Each cardiac cycle includes three phases.
Atrial systole lasts for 0.15 seconds and includes contraction of both the atria to allow the blood to enter from atria into the ventricles. It is followed by a ventricular system that lasts for around 0.30 seconds. It includes contraction of both the ventricles to facilitate the pumping of blood into the pulmonary artery and aorta from the right and left ventricles respectively. The last phase of the cardiac cycle is the combined diastole of atria and ventricles so that blood from the vena cava and pulmonary veins fill the right and left atria respectively.
Each heartbeat consists of one complete cardiac cycle. It takes 0.8 seconds to complete one cardiac cycle and therefore, there are 70 cardiac cycles in a minute.
The contraction of the heart chambers is called systole while their relaxation is called diastole. As the blood from the heart is pumped into the arteries after each systole of the left ventricle, arteries expand and then recoil. The alternate expansion and recoiling of the arteries produce a pulse. Since each pulse is produced after the systole of the left ventricle, each cardiac cycle generates one pulse. Therefore, each heartbeat gives rise to one pulse. So, the pulse rate is mostly the same as the heart rate.
So, the correct answer is option C. One heartbeat generates one pulse.

Note:- Human heart beats 70 times in a minute. The pulse rate is mostly 70 beats per minute. The pulse is best observed in the arteries that are present closer to the heart since the blood pressure dissipates as blood flows away from the heart.