Question

Some features of the circulatory system in humans are mentioned below. Select the INCORRECT option?

• A. Hypertension is caused by constriction of veins
• B. Platelets help in clotting of blood
• C. Lymph is also called tissue fluid
• D. Capillaries join to form veins

Answer 1

Answer:

A. Hypertension is caused by constriction of veins

• Hypertension is caused by constriction of arteries, not veins.

• The other options are correct statements about the circulatory system.

• Small arteries (arterioles) can narrow (constrict), forcing the blood from each heartbeat through a narrower space than normal.

• Because the space in the arteries is narrower, the same amount of blood passing through them increases the blood pressure.