Adrenaline increases which of the following?
Heart Rate
Blood Pressure
Amount of glucose in blood
When you face a dangerous situation, adrenal glands secrete adrenaline, which increases the heart rate and pumps more blood to the skeletal muscles to increase the supply of oxygen to the skeletal muscles. As the blood is pumped with more pressure, the blood pressure increases. The amount of glucose in blood increases to provide more energy. Adrenaline increases the heart rate, blood pressure and the amount of glucose in blood.
Aggressive behaviour is more due to hormone testosterone.