Question

Which of the following is a function of adrenaline?

• A. Helps in gastric juice secretion
• B. Helps in milk secretion
• C. Increases heart rate and blood pressure
• D. Increases blood calcium

Answer 1

The correct option is C

Increases heart rate and blood pressure

Adrenaline is secreted by the adrenal medulla. It mainly acts on smooth muscles, cardiac muscles, blood vessels, skeletal muscles and fat cells.

Adrenaline initiates the stress responses in the body.

It increases heart rate, blood pressure, metabolic rate, dilates blood vessels and increases the breathing rate and hence oxygen consumption and glucogenesis (i.e. the formation of glucose by the breakdown of liver glycogen), elevating the blood glucose levels.