Question

Identify whether each scenario is an example of a positive feedback loop or a negative feedback loop. Positive feedback Negative feedback A camera pointed at a television that is displaying the camera's feed causes a recursive image loop to show up on the television During childbirth, muscle contractions in the uterus cause the release of oxytocin, which stimulates the muscles to contract in the uterus, causing of more oxytocin When immune system proteins bind to a pathogen, they release signals that activate their own activity and the activity of other proteins When a person's hypothalamus detects an increase in body temperature, and are stimulated to release sweat A toilet's float valve turns on water flow when the reservoir level drops and shuts off water flow when the water above a set level. If a prey plotice shrinks, some predators starve and their numbers also decrease. The resulting drop in predation rates allows more prey urvive Answer Bank

Answer 1

A positive and negative feedback system is two different reactions which is triggered by certain reactions that ends up in different products. They are very important to maintain a balance, incase of living organisms- to maintain homeostasis.

A positive feedback is when the product of a particular reaction increases the rate of the reaction and thus increasing the product itself. For ex- from the below description, lets take that of child birth. the contractions during child birth increase oxytoxin-- oxytoxin thereby increases more contractions which results in more secretion of oxytoxin.

Negative feedback is when the product stops the reaction. The cycle between the population of a prey and a predator are also examples of negative feedback. If the population of prey increases, predators eats more prey- decreasing the number of the prey. Decrease in prey decreases the population of predators due to less availability of its prey.

POSITIVE FEEDBACK	NEGATIVE FEEDBACK
A cameria pointed on a television that is displaying a recursive image loop to show up on television	A toilets float valve turns on water flow when the reservoir levels off and shuts off water flow when the water rises above the sea level
During childbirth, muscle contractions in the uterus causes the release of oxytoxin, which stimulates the muscles to contract in the uterus, causing the release of more oxytoxin	when a person s hypothalamus detects an increase in the body temperature,glands are stimulated to release more sweat
when immune system protein binds to the pathogen, they release the signalsthat activate their own activity and the activity of other protein	If a prey populations shrinks, some predators starve and their number decreases.the resulting drop in predators allows more prey to survive