2- The Physiological Stress Response Flashcards Preview

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Flashcards in 2- The Physiological Stress Response Deck (22):
1

What did Walter Cannon do ?

Come up with the idea of a fight-or-flight response

2

what happens in the face and head with a fight or flight response ?

saliva flow decreases
eye pupils dilate

3

what happens in the skin with a fight or flight response ?

blood vessels constrict, chills, sweating

4

what happens in the lungs during a fight or flight response ?

quick, deep breathing (bronchodilation)

5

what happens in the stomach and intestines during a fight or flight response ?

output of digestive enzymes decreases
bowel movements slows

6

so vessels in muscle areas dilate or constrict in fight or flight ?

dilate

7

explain Hans Selye's General Adaptation Syndrome and its three phases

1) alarm reaction
2) resistance: continued exposure to stress
3) exhaustion (adrenal failure)

8

what does Selye's theory say about how we handle stress in the modern age ?

we have adapted our physiological responses to deal w physical stressors but not mental stressors

9

what is the PNS' role

maintain homeostasis through release of Ach
responsible for energy conservation and relaxation

10

in fight or flight response, which structure in the brain is stimulated ?

hypothalamus

11

what are the four components of the endocrine system ?

glands
hormones
circulation
target organs

12

what are the three glands most involved w stress response ?

pituitary
adrenal
thyroid

13

Explain the hypothalamic–pituitary–adrenal axis

hypothalamus sends CRH to pituitary, ACTH to adrenal, releasing cortisol, from there negative feedback loop back to hypothalamus

14

who is more of a stress hormone, cortisol or NE/E ?

all of them

15

what does cortisol do to BP

stabilizes it

16

what does cortisol do to blood sugar

maintains it

17

what does cortisol do to memory

improves capability

18

what are the three stages of effects associated with the stress response

- immediate
- intermediate
- prolonged

19

what is the immediate stress response

SNS
NE, E release
2-3 seconds

20

what is the intermediate stress response

Adrenal response
NE, E release from adrenal medulla
20-30 seconds

21

what is the prolonged stress response

ACTH, vasopressin, thyroxine
may be minutes, hours, days, weeks after

22

how is cortisol related to the immune system

it suppresses it