lesson 1.2: homeostasis, positive and negative feedback.

Question 1

what is homeostasis?

Answer 1

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

Question 2

what is an example of homeostasis?

Answer 2

body temp
blood pressure
blood pH
blood glucose

Question 3

what are the three functional components of homeostasis control systems?

Answer 3

receptor: to detect change
control centre: to process the change
effector: to produce a response

Question 4

what is positive feedback? give an example

Answer 4

positive feedback is when the stimulus doesn’t counteract the changes, but instead increases the stimulus. child birth, as contractions increase so does oxytocin

Question 5

what is negative feedback? give an example

Answer 5

negative feedback is when the body diminishes or counteracts the stimulus to re-establish homeostasis and stability. body temperature, pH, and blood pressure are examples of this.

Question 6

what is the hypothalamus?

Answer 6

the control centre inside of our brain, it monitors body conditions.

Question 7

what is the cycle of negative feedback

Answer 7

imbalance in the body
receptor senses it
control centre processes the info
effector gives response