CHAPTER 10 LESSON 3

Cells & Homeostasis

Essential Question

What are cells made of?

How do Cells Maintain Homeostasis?

Homeo- The sameStasis- A condition of Balance

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Homeostasis

How are these people maintaining homeostasis?

Homeostasis in Cells

In all cells processes that help maintain homeostasis include:

getting and using energy from food

removing wastes.

Energy from Food Making Food

Cellular respirationCells break down

glucose molecules in the presence of oxygen for energy

Waste product: carbon dioxide &

water

PhotosynthesisCells capture sun’s

energy to produce glucose molecules

Waste product: oxygen

Getting and Using Energy

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Cell Membrane

Made of two layers of fat, the cell

membrane is the gate keeper of the cell.

Cell Membrane

There are structures in the cell membrane to regulate materials in and out of the cell.

Diffusion- movement of particles

Particles move from

higher concentrati

on to lesser

concentration

Osmosis- diffusion of water

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Home LearningComplete Lesson 4 Assess Your

Understandings

Review & Assessment Page 398 #12-17

Science in the News 3/31Extra Credit:

Gizmo #13 3/31“Cell” Phone- 4/3