5.2 Fight or Flight Flashcards Preview

A Level Biology > 5.2 Fight or Flight > Flashcards

Flashcards in 5.2 Fight or Flight Deck (19):
1

when a potentially dangerous stimuli is detected what does the body trigger?

series of physical responses

2

what is the fight or flight response intended to help mammals do?

survive

3

what nervous system detects a threat?

autonomic

4

(threat) hypothalamus communicates with the adrenal cortical system and which nervous system?

sympathetic

5

the sympathetic nervous system uses which pathways to initiate reactions?

neuronal

6

the adrenal cortical system uses which cell signalling molecules?

hormones

7

the sympathetic nervous system sends out impulses to where?

glands and smooth muscle

8

the sympathetic nervous system tells the adrenal medulla to release which hormones?

adrenaline and noradrenaline

9

release of long term stress hormones from the adrenal cortex is controlled by what?

hormones from pituitary gland

10

hypothalamus stimulates the pituitary gland to release which hormone?

ACTH

11

where does ACTH travel?

bloodstream to adrenal cortex

12

what does ACTH activate?

release of many hormones to prepare to deal with a threat

13

one physical fight or flight response is increased heart rate what does this do?

pumps more oxygenated blood to body muscles in preparation to run or fight

14

one physical fight or flight response is pupil dilation what does this do?

takes in as much light as possible for better vision

15

one physical fight or flight response is arteriole constriction what does this do?

sends more blood to essential organs e.g. muscles, brain and heart

16

one physical fight or flight response is increasing blood glucose levels what does this do?

increases respiration to provide energy for muscle contraction

17

one physical fight or flight response is smooth muscle relaxation what does this do?

allows more oxygen into lungs

18

one physical fight or flight response is non essential systems shut down what does this do?

focuses resources on emergency functions

19

one physical fight or flight response is difficulty focusing on small tasks what does this do?

brain solely focuses on danger or threat

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