The Endocrine System- The Fight Or Flight Response Flashcards
(7 cards)
What are the 6 AO1 points you must know for fight or flight response?
-definition of response
-role of hypothalamus
-activation of the sympathetic nervous system SNS
-role of ACTH and adrenaline
-role of the parasympathetic nervous system PNS
What is the fight or flight response?
The fight or flight response is an automatic, reflexive reaction to stress in which the body becomes physiologically aroused to prepare for confronting or escaping a threat.
What triggers the fight or flight response in the brain?
The hypothalamus recognises a threat in the environment and activates the autonomic nervous system (ANS), specifically the sympathetic branch.
What hormone does the pituitary gland release during the stress response and what does it do?
The pituitary gland releases adrenocorticotrophic hormone (ACTH), which signals the adrenal glands to release adrenaline into the bloodstream.
What are the main physical effects of adrenaline on the body?
Adrenaline increases heart and breathing rate, dilates pupils, inhibits digestion and saliva production, and contracts the rectum, preparing the body for rapid action.
What happens after the threat has passed in the fight or flight response?
The parasympathetic branch of the ANS is activated, which returns the body to its normal resting state by decreasing heart rate, slowing breathing, and stimulating digestion.
What is the role of the adrenal glands and cardiovascular system in the fight or flight response?
The adrenal glands release adrenaline, which acts on the cardiovascular system to stimulate heart rate, contract blood vessels, and dilate air passages—enhancing oxygen delivery to muscles.
