Homeostasis Review

Homeostasis mechanisms...

• keep everything exactly the same.

• usually operate by positive feedback systems.

• act to keep the internal environmental conditions outside the normal range

• is the ability to maintain a relatively stable internal environment

Tags

NGSS.HS-LS1-3

This is the term used to describe the normal range of a variable in an organism

• control center

• effector

• stimulus

• set point

Tags

NGSS.HS-LS1-3

Which of the following is not regulated by homeostasis?

• body temperature

• blood sugar

• blood pH

• body movements

Tags

NGSS.HS-LS1-3

This feedback system amplifies a change until a desired outcome is reached.

• positive feedback system

• negative feedback system

• neutral feedback system

• self-monitoring feedback system

The feedback system that returns the body back to the normal set point.

• positive

• negative

• neutral

• returnable

Tags

NGSS.HS-LS1-3

Which type of feedback system is more common in maintaining homeostasis?

• positive

• negative

• neutral

• balanced

Tags

NGSS.HS-LS1-3

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Tags

NGSS.HS-LS1-3

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

Tags

NGSS.HS-LS1-3

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. 

• Positive Feedback Response
• Negative Feedback Loop 

Tags

NGSS.HS-LS1-3

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response
• Negative Feedback Loop 

Tags

NGSS.HS-LS1-3