Homeostasis

Question 1

What is homeostasis?

Answer 1

All body systems working together to maintain a stable internal environment
Physiological response to changes inside/outside the body
To ensure body functions within normal range

Question 2

An organism is at homeostasis when internal environment:

Answer 2

Contains optimal amount of chemicals
Has optimal temperature
Optimal pressure for survival of living cells

Question 3

What are the 2 ways the body maintains homeostasis?

Answer 3

Intrinsic/Autoregulation
- Auto response within a cell, tissue or organ to some environment change
Extrinsic Regulation
- Responses controlled by the nervous and endocrine systems

Question 4

What are the 3 Components for Homeostasis and what do they do?

Answer 4

Receptor: Detects change in environment
Control Centre: Processes info and determines what response needs to occur to make change return to normal
Effector: Carries out instructions from control centre

Question 5

What is a negative feedback loop?

Answer 5

Response of effector reduces/stops stimulus
Body returns to homeostasis

Question 6

What is an example of a negative feedback loop?

Answer 6

Regulation of Blood Sugar

Question 7

What is a positive feedback loop?

Answer 7

Response of effector increases change of stimulus
Body is moved from homeostasis
Speeds up processes

Question 8

What is an example of a positive feedback loop?

Answer 8

Break or tear of blood vessel