Stress response and homeostatic balance

Question 1

define homeostasis

Answer 1

ability to maintain a constant internal environment in response to environmental changes

Question 2

outline the 4 stages of the feedback system cycle

Answer 2

1. stimulus
2. receptors
3. input
4. output

Question 3

what is a short loop negative feedback

Answer 3

inhibition of hypothalamic tropic hormones by the anterior pituitary tropic
hormone

Question 4

what is a long loop negative feedback

Answer 4

the hormone whose secretion is stimulate by the tropic hormone that generally feeds back to the hypothalamus and anterior pituitary to inhibit secretion of tropic hormone

Question 5

when does stress exist

Answer 5

when an imbalance or discrepancy exists between perceived demands and perceived coping resources

Question 6

what is a stressor

Answer 6

anything that prompts the body to:

• respond quickly to potentially dangerous stimuli

Question 7

what is cushing syndrome and how can it be caused

Answer 7

• chronically increased level of cortisol
• can be caused by an ACTH producing tumour

Question 8

what is Addison’s disease and what is it due to

Answer 8

• chronic low levels of circulating cortisol