Question

you may have noticed that once calcium levels drop below average, the body responds by raising blood calcium levels back to normal. this response is called negative feedback.negative feedback is a response that opposes a change that disrupts a set parameter in the body. for example, if your temperature rises beyond a set point, your body will counter that by doing the opposite-cooling you down. negative feedback loops are common in the body for controlling the amount of sugar in your blood or regulating blood pressure.which of the following is an example of negative feedback loop?select all that may apply.□ a houses thermostat senses the temperature is too warm and turns on the air conditioning.□ because youve given away too many free ketchup packets, your boss yells at you to stop and you do.□ when you get cut, platelets in your blood go to the site and signal more platelets to stop the bleeding.□ once your temperature gets too low, your body begins to shiver to produce heat.□ oxytocin is a hormone that causes contractions in childbirth. once a little oxytocin is released, it triggers more oxytocin to be released.

Explanation:

A negative feedback loop opposes a disruptive change to return to a set parameter.

1. The thermostat detects warm temp, activates AC to cool back to set point, opposing the change.
2. The boss stops excessive ketchup giving, reversing the overuse to return to normal.
3. Platelets signaling more platelets amplifies clotting, which is positive feedback, not negative.
4. Shivering generates heat to raise low body temp back to normal, opposing the drop.
5. Oxytocin triggering more oxytocin amplifies contractions, which is positive feedback, not negative.

Answer:

A. A house's thermostat senses the temperature is too warm and turns on the air conditioning.
B. Because you've given away too many free ketchup packets, your boss yells at you to stop and you do.
D. Once your temperature gets too low, your body begins to shiver to produce heat.