Question

The heart usually pumps blood with greater force in the old people than the young because

• A. The oxygen content per unit volume of the blood decreases
• B. The elasticity of the arteries decreases
• C. The elasticity of the arteries increases
• D. The nutrient content per unit of blood decrease

Answer 1

The correct option is B The elasticity of the arteries decreases

The heart is a major organ of the human system that pumps blood to other organs and tissues of the body. The blood carries the oxygen and nutrients required by the organs. But, the heart is also a muscle and to enable it to pump effectively, it needs a supply of oxygen, and with age, the function of the heart is influenced by the decrease in elasticity of the arteries and its to respond to changes in pressure. This gives rise to increased resistance to the pumping action of the heart thereby requiring a greater force to pump the blood to the organs of the body in old people.
So, the correct answer is option B.