Pyq- Human Physiology- Body Fluids And Circulation
- The answer is (A).
The total blood volume in a healthy adult is approximately 5 litres. This volume is maintained by the kidneys, which regulate the excretion of water and electrolytes.
- The answer is (C).
The kidneys help in maintaining the blood volume by regulating the excretion of urea. Urea is a waste product of protein metabolism that is excreted in the urine.
- The answer is (A).
The heart is enclosed in a double-walled sac called the pericardium. The pericardium is a thin, fibrous sac that protects the heart from infection and injury.
- The answer is (B).
The amount of blood pumped out by each ventricle per minute is called the cardiac output. The cardiac output is a measure of the heart’s pumping efficiency.
- The answer is (C).
The human heart does not provide immunity. Immunity is the body’s ability to fight off infection. The human heart is responsible for pumping blood throughout the body and maintaining blood pressure.
BETA
