homeostasis principles and feedback mechanisms

Question 1

why is it important to maintain blood glucose conc

Answer 1

-if blood glucose too high water potential of blood reduced
- water molecules diffuse out of cells into blood via osmsis
- cells shrivil and die

• blood glucose too low cell unale to carry out normal activities as not enough glucose for respiration

Question 2

what process does homeostasis involve

Answer 2

negative feedback

Question 3

what is negative feedback and why is it important
what is the opposite of negative feedback
give some examples of negative feedback

Answer 3

negative feedback is restoration back to the optimum
e.g controll increase and decrease of blood glucos
posistive feedback
negative feedback important as gives control over internal envirment - you have multiple negative feedbck mechanisms as only one means slower response and less control

Question 4

what is positive feedback and give an example

Answer 4

-further increase from the normal level
e.g blood clotting