Homeostasis Feedback Loops

Which of the following are regulated in order to maintain homeostasis?

• pH of your blood

• internal body temperature

• blood glucose levels

• all of the above AND MORE have to be regulated to maintain homeostasi .

Ectothermic animals have body temperatures that:

• stay relatively constant

• change with the environment

What happens when a person's body temperature is too high?

• The person starts to sweat, which lowers their body temperature. 

• The person starts to shiver, which increases their body temperature. 

• The person starts to sweat, which increases their body temperature. 

• The person starts to shiver, which lowers their body temperature. 

What does negative feedback do?

• Allows the body to return to a set point

• Causes harm to the body

• Encourages the body to move even further away from a set point.

What happens when glucose levels are too high?

• insulin is released and glucose goes into cells.

• insulin is released, the amount of glucose in the blood stream stays the same.

• insulin is released, which puts more glucose into the blood stream. 

What is the role of glucagon?

• to release proteins from cells when blood glucose is too low

• to release glucose from the liver when blood glucose is too low

• to release glucose from the pancreas when blood glucose is too high

• to release insulin from the pancreas when blood glucose is too high

Why is birthing a baby an example of positive feedback?

• If the woman's body still feels the stretching and pressure from the baby, it adds EVEN MORE oxytocin into the bloodstream.

• If the woman's body still feels the stretching and pressure from the baby, it adds LESS oxytocin into the bloodstream.

Which kind of feedback maintains blood glucose levels?

• negative

• positive