Cell Theory and Homeostasis

What is homeostasis?

• The body's ability to maintain a stable internal environment

• The process of increasing body temperature

• A condition caused by heat stroke

• A type of feedback loop

Tags

NGSS.HS-LS1-3

What mechanism does the body use to regulate temperature?

• Negative feedback loop

• Positive feedback loop

• Thermal expansion

• Conduction

Tags

NGSS.HS-LS1-3

What can happen if the body's temperature regulation system fails?

• Heat stroke

• Hypothermia

• Frostbite

• Dehydration

Tags

NGSS.HS-LS1-3

What is a potential consequence of a failed fever response?

• Prolonged high temperatures leading to complications

• Immediate recovery from infection

• Decreased body temperature

• Increased appetite

Tags

NGSS.HS-LS1-3

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

Tags

NGSS.HS-LS1-3

Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

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

What is an example of a positive feedback mechanism?

• 
• 

Tags

NGSS.HS-LS1-3

Failure to maintain homeostasis could result in:

• lack of internal balance
• eventual death
• difficulty carrying on metabolism 
• all three

Tags

NGSS.HS-LS1-3

Which of the following is NOT a component of the cell theory?

• All cells come from other cells.
• All living things are made of cells.
• Cells are the smallest part of an organism.
• Cells are the most basic unit of life.