Homeostasis and Levels of Organization

Front

An atom is...

Back

the smallest part of a substance that cannot be broken down chemically

Front

What is the most basic unit of LIFE?

Back

Cell

Front

Tissues are made of...

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Cells

Front

Which term describes the systems in an organism that maintain homeostasis?

Back

Feedback Loop

Front

Example of positive feedback to indirectly maintain homeostasis:

• the chemical reactions involved in blood clotting after a wound
• blood vessels constrict and shivering in response to low body temperature
• blood vessels dilate and sweating in response to high body temperature
• coach compliments performance during practice

Back

the chemical reactions involved in blood clotting after a wound

Front

Homeostasis

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is the maintenance of relatively stable internal environment and often incorporates a form of feedback regulation

Front

Positive or Negative Feedback Loop?

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 and form a blood clot. The hormone signals continue until the cut is closed.

Back

Positive Feedback Loop

Front

You eat a donut for breakfast, and your pancreas releases insulin to lower the glucose levels in your blood. Positive or Negative Feedback Loop?

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Negative Feedback Loop

Front

Positive or Negative Feedback Loop?

It is a beautiful 75 degree day in May. You have to run a mile during PE. Your body starts to sweat, your breathing rate increases, and your face is flushed because it is so HOT.

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Negative Feedback Loop

Front

Correct order of organization from atom to organisms? Options: Organism - organ system - organ - tissue - cell - organelle - molecule - atom, Organism - organ system - tissue -cell - organ - organelle - molecule - atom, Atom - tissue - organelle - cell- molecule - organ - organ system - organism, Atom - molecule - organelle - cell- tissue - organ - organ system - organism

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Atom - molecule - organelle - cell- tissue - organ - organ system - organism