ANATOMY

GENERAL ANATOMY

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When we are in stress, our ____ nervous system is activated. Our heart rates become ____ while our digestion becomes ____
A
parasympathetic, slower, faster
B
parasympathetic, faster, slower
C
sympathetic, slower, faster
D
sympathetic, faster, slower
Explanation: 

Detailed explanation-1: -Your sympathetic nervous system is best known for its role in responding to dangerous or stressful situations. In these situations, your sympathetic nervous system activates to speed up your heart rate, deliver more blood to areas of your body that need more oxygen or other responses to help your get out of danger.

Detailed explanation-2: -When the body is stressed, the SNS contributes to what is known as the “fight or flight” response. The body shifts its energy resources toward fighting off a life threat, or fleeing from an enemy. The SNS signals the adrenal glands to release hormones called adrenalin (epinephrine) and cortisol.

Detailed explanation-3: -The sympathetic nervous system (SNS) releases the hormones (catecholamines-epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate.

Detailed explanation-4: -The stress response tells the brains to send a signal to the adrenal glands they should release adrenaline. This release can cause high blood pressure, increased blood sugar, or increased heart rate. Cortisol damages the brain as well, as it can kill cells in the hippocampus and age the brain.

Detailed explanation-5: -The autonomic nervous system is one of the major neural pathways activated by stress. In situations that are often associated with chronic stress, such as major depressive disorder, the sympathetic nervous system can be continuously activated without the normal counteraction of the parasympathetic nervous system.

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