Understanding the Fight-or-Flight Response

Mr. Andersen explains the fight-or-flight response, highlighting the role of the nervous system and adrenaline. He describes how the body reacts to threats, detailing the functions of the hypothalamus, adrenal medulla, and epinephrine. The video covers how these elements affect organs and bodily functions, such as heart rate, breathing, and digestion, to prepare the body for action.

What is the initial response of the body when a person suddenly avoids a car accident?

• Activation of the nervous system and muscles

• Vasodilation of blood vessels

• Release of adrenaline

• Increase in heart rate

Which system in the body is responsible for the fight-or-flight response?

• Endocrine system

• Central nervous system

• Parasympathetic nervous system

• Sympathetic nervous system

What part of the brain is primarily involved in initiating the fight-or-flight response?

• Cerebellum

• Hypothalamus

• Medulla oblongata

• Cerebrum

What is the role of the adrenal medulla in the fight-or-flight response?

• It increases digestion

• It releases adrenaline

• It slows down the heart rate

• It releases cortisol

How does adrenaline affect the liver during the fight-or-flight response?

• It decreases glucose production

• It increases fat storage

• It reduces blood flow to the liver

• It converts glycogen to glucose

What effect does adrenaline have on the heart?

• It decreases the heart rate

• It causes vasoconstriction

• It reduces cardiac output

• It increases the heart rate

How does adrenaline influence the breathing rate?

• It causes shallow breathing

• It speeds up breathing

• It has no effect on breathing

• It slows down breathing

What happens to the digestive system when adrenaline is released?

• The digestive system becomes more active

• Blood flow to the digestive system increases

• Digestion speeds up

• Digestion slows down

What is the effect of adrenaline on the muscles during a fight-or-flight response?

• It causes muscle relaxation

• It reduces blood flow to muscles

• It increases blood flow to muscles

• It decreases muscle strength

Why does the body reduce focus on digestion during a fight-or-flight response?

• To conserve energy for muscle activity

• To increase blood flow to the brain

• To enhance sensory perception

• To improve respiratory efficiency