Question

The pulse beat is measured by the
A. Artery
B. Capillary
C. Vein
D. None

Answer 1

Hint: Blood is the fluid in our body which passes the nutrients and oxygen to our body. The heart pumps the blood through the aorta which is the biggest artery in our system. The blood passes through the pulmonary arteries to the lungs to oxygenate it.

Complete answer:
Heart in our body is the prominent organ which oxygenates the blood and pumps it throughout the body.
The deoxygenated blood from the body is brought to the heart and via auricles and ventricles, it is oxygenated. Aorta is the tube through which blood leaves the heart. Arteries carry the oxygenated blood whereas the veins carry the deoxygenated blood.
Let us learn about the options.
Option A. Artery: The blood vessels which carry the oxygen-rich blood to the body are arteries. It is lined by smooth tissue and inner layer layered by endothelium. Aorta is also an artery. The pulse rate is measured by superficial arteries – that are near to the body surface. There are two types of superficial arteries- radial arteries at the wrist and temporary artery. The radial artery at the wrist is easy to feel my fingers.
Option B. Capillary: The small blood vessels having one endothelial cell thick wall convey the blood between arteries and veins. They are the smallest blood vessels in our body.
Option C. Vein: Blood vessels which carry the low oxygen blood to the heart from the tissues are the veins. They are usually blue. They are located deep in the skin, that is they are not as superficial as arteries.
So the answer is option A: Artery

Note: Dark reaction was given by Calvin. This reaction is also called the ${C_3}$ cycle or the reductive pentose phosphate process. The plants carrying out the Calvin cycle are called ${C_3}$ plants. The Calvin cycle occurs in three steps- fixation, reduction and regeneration.