Homeostasis

Question 1

Define homeostasis

Answer 1

A central principle in physiology and aims to maintain life by constantly adapting to the external environment.

Question 2

Describe the components of a feedback loop

Answer 2

Sensors, comparator, effectors

Question 3

Describe the types of compensatory regulatory responses

Answer 3

Cold temp- vasoconstriction, shivering, goose bumps
Too hot - vasodilation, sweating

Question 4

Describe a positive feedback loop, with an example

Answer 4

Acts to increase an effect.
Blood pressure

Question 5

Describe a negative feedback loop, with an example.

Answer 5

Acts to reduce an effect
thermoregulation.

Question 6

Describe physiological modification of set points

Answer 6

Set points are changed from normal due to different circumstances.
If there is an infection- pyrexia
Persistant hypoxaemia- pCO2