Homeostasis

Question 1

What is homeostasis?

Answer 1

A process that aims to maintain a constant internal environment of an organism within set limits to allow for optimal cell and system function

Question 2

What variables are subject to homeostasis?

Answer 2

Temperature: Optimal body temp. is around 36.5 - 37.5

pH (acidity level): Optimal pH of blood is 7.35 - 7.45
blood sugar levels - 4.0 - 7.8 mmol/L

Na and K concentrate

Question 3

What is the stimulus response model?

Answer 3

Stimulus, Receptor, Modulator, Effector and Response

Question 4

What are the different receptors and what do they do?

Answer 4

Thermoreceptors: detect temp. change

Nociceptors: detect painful stimuli

Baroreceptors: detects pressure change

Chemoreceptors: detects change in chemical concentration

Photoreceptors: detect change in light

Question 5

What is the negative feedback loop?

Answer 5

The negative feedback loop is

Question 6

What is the positive feedback loop