Compare and contrast negative vs. positive feedback mechanisms. Provide a physiological example for each system

Question

Question

Answer 1

Answer #1

Positive feedback mechanism	Negative feedback mechanism
1)Enhances change	Reduces change

2)WIDER RANGE	Narrower range
3)Less associated with stability	Closely associated with stability
4)Less frequent mechanism	More frequent mechanism
5)Exhibits positive correlation between stimulus and product	Exhibits negative correlation between stimulus and product

6)Associated with vicious cycles and even death	Associated with restoring and homeostasis
7)Require external interruption	Does not require external interruption.
8)More products	Less products

Physiological examples of Positive feedback:

1)Blood clotting

2)menstrual cycle

3)Labour and childbirth

4)Digestion

5) Nerve signalling

Physiological examples of negative feedback:

1)Thermo regulation

2)Blood sugar regulation

3)Blood pressure regulation

4)Erythropoiesis

5)Thyroid regulation

Answer 2

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