Question

Select the INCORRECT statement.

• A. Blood pressure is directly proportional to the viscosity of blood.
• B. In women, usually the BP increases after menopause.
• C. The hormone ADH reduces BP.
• D. Blood loss in an accident decreases the BP.

Hint:

ADH raises blood pressure by water retention and constriction of arterioles.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Blood pressure rises with resistance and blood volume and falls when blood volume falls.

Step 2: Check the true statements
Higher viscosity increases resistance, so BP increases. After menopause, loss of oestrogen usually raises BP in women. Blood loss reduces volume and decreases BP.

Step 3: Find the false statement
ADH (vasopressin) increases water reabsorption in the kidney and constricts arterioles, so it raises BP instead of reducing it.

Final Answer:
The statement that ADH reduces BP is incorrect. \[ \boxed{\text{(C) }\text{The hormone ADH reduces BP.}} \]