Question

multiple choice question
epinephrine and norepinephrine do what to blood pressure?

they have no effect on blood pressure.
they lower blood pressure.
they raise blood pressure.

Explanation:

Epinephrine and norepinephrine are hormones involved in the body's stress response (fight - or - flight). They act on blood vessels and the heart. Epinephrine can increase heart rate and contractility, and both hormones can cause vasoconstriction in some blood vessels. These actions lead to an increase in blood pressure. The option "They have no effect on blood pressure" is incorrect as these hormones do impact blood pressure. The option "They lower blood pressure" is also incorrect; their physiological role is to increase blood pressure in situations like stress or emergency.

Answer:

C. They raise blood pressure (assuming the options are labeled A, B, C as: A. They have no effect on blood pressure, B. They lower blood pressure, C. They raise blood pressure)