Homeostasis & Cells Review

Which body system controls the body to maintain homeostasis?

• excretory

• nervous

• circulatory

• skeletal

Tags

NGSS.HS-LS1-3

Which of the following describes homeostasis?

• keeps variables exactly at the set point

• organism's ability to maintain steady(stable) internal conditions

• acts to keep values outside of a desired range

• operates through positive feedback

Tags

NGSS.HS-LS1-3

During child birth a woman's body over produces a hormone called oxytocin until the baby is born. What kind of feedback loop would this be?

• Negative Feedback Loop

• Positive Feedback Loop

• Neutral Feedback Loop

• Linear Feedback Loop

Tags

NGSS.HS-LS1-3

When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?

• Negative Feedback Loop

• Positive Feedback Loop

• Neutral Feedback Loop

• Linear Feedback Loop

Tags

NGSS.HS-LS1-3

Positive Feedback loops are...

• Counteract changes that move above or below set values.

• more common

• regulate body temp

• Purposeful pushes above normal set values.

Tags

NGSS.HS-LS1-3

What is an example of a positive feedback mechanism?

• 
• 

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

When you are cold, you shiver and your blood vessels contract, which warms you up. When you are hot, you sweat and your blood vessels expand, which cools you down.  

• Positive Feedback Response
• Negative Feedback Loop 

Tags

NGSS.HS-LS1-3

A change inside of the organism caused by the initiation event is the ...

• response

• effector

• control center

• stimulus

Tags

NGSS.MS-LS3-1

Which part of the feedback loop is a body part that makes a change to bring the system back to homeostasis?

• Effector

• control center

• response

• receptor