Question

Terry is riding his bicycle across a crosswalk when a car races toward him. Realizing that the car is not going to stop, Terry hits his brakes just in time. His heart is racing and it takes him about 15 minutes to fully recover from the experience. His response demonstrates the importance of the hormones _____ and _____ in the nervous system.

Answer 1

Answer:

epinephrine, norepinephrine

Explanation:

Epinephrine and norepinephrine are both catecholamine chemicals. They have almost the same function in the human body.

Function of Epinephrine

• Increasing the blood sugar levels
• Increased heart rate by putting pressure on the heart
• Increasing the pressure on the heart (squeezing the heart)
• Relaxation of smooth muscle in the airways to improve breathing

Functions of Norepinephrine

• Increasing the blood sugar levels
• Increased heart rate by putting pressure on the heart
• Increasing the pressure on the heart (squeezing the heart)
• Control the diameter of the blood vessels

One of the major differences in among these hormones is that epinephrine takes action on both alpha and beta receptors, and norepinephrine takes action on alpha receptors. The alpha receptors are located in the arteries while the beta receptors are located in the lungs, heart, and arteries which are of the skeletal muscles.