Question

Which division of the nervous system initiates a response known as fight or flight? The sympathetic nervous system the parasympathetic nervous system the somatic nervous system none of the above?

Answer 1

Answer:

sympathetic nervous system..........

Answer 2

Answer:

The sympathetic nervous system is the division of the nervous system that initiates a response known as a fight or flight response.

Explanation:

Fight-or-flight responses are the series of physiological responses which are initiated by the release of catecholamines by the adrenal medulla. The adrenal medulla gets activated by the sympathetic division of the nervous system and releases the hormones. Effects that can be seen during the fight-or-flight responses are-

• Dilation of pupils.

• Increase in blood pressure, heart rate, and force by which the heart is contracting.

• Dilation of airways, allows the air to move in and out of the lungs at a faster pace.

• The release of glucose by the liver leads to a rise in blood glucose levels.

• Glycogenolysis performed by liver cells

• Allowing greater blood flow through the blood vessels that supply the blood to the organs involved in the exercise.

• Constriction of blood vessels that supply blood to the kidneys and gastrointestinal tract.