EVERYDAY SCIENCE

Detailed explanation-1: -Adrenaline is now increasingly recognized as an important metabolic hormone that helps mobilize energy stores in the form of glucose and free fatty acids in preparation for physical activity or for recovery from hypoglycaemia.

Detailed explanation-2: -Effects of epinephrine stimulation are especially evident during stress reactions, and epinephrine is one of the major hormones involved in the stimulation of the sympathetic nervous system.

Detailed explanation-3: -After the amygdala sends a distress signal, the hypothalamus activates the sympathetic nervous system by sending signals through the autonomic nerves to the adrenal glands. These glands respond by pumping the hormone epinephrine (also known as adrenaline) into the bloodstream.

Detailed explanation-4: -Adrenaline increases your heart rate, elevates your blood pressure and boosts energy supplies. Cortisol, the primary stress hormone, increases sugars (glucose) in the bloodstream, enhances your brain’s use of glucose and increases the availability of substances that repair tissues.

Detailed explanation-5: -Epinephrine is the principal hormone that interacts with the sympathetic nervous system in the initial part of the fight-or-flight response. Fun fact: epinephrine and norepinephrine function both as hormones in the endocrine system and as neurotransmitters in the nervous system!