Chapter 3 Section 2Looking Inside Cells

Big Idea

Anticipatory Set

How does a school work?

California StandardsScience Standard 7.1.b:

Students know the characteristics that distinguish plant cells from animal cells, including chloroplasts and cell walls.

Paraphrase:

Differences between a plant and animal cell.Open to page 88

Input

Cell Membrane The cell membrane surrounds the

cytoplasm of the cell. It acts as a boundary layer to contain

the cytoplasm (fluid in cell).It allows water, oxygen, and other

materials to pass in and out of cells.

CytoplasmCytoplasm is the material between the

cell’s nucleus and the cell membrane.It fills the entire cell.It contains a large variety of organelles

and nutrients.The cytoplasm consists of an outer

ectoplasm and an inner endoplasm. It stores nutrients.

NucleusThe nucleus is the cell’s command center.

The cell nucleus contains the cell's DNA, the genetic code.

MitochondriaThe mitochondria provide the energy for the cell.

OrganellesOrganelles are small structures that help carry out

the day-to-day operations of the cell. Types of organelles:Ribosome are organelles which participate in

protein synthesis.Mitochondrion, the power plants of the cell, are

organelles that produce energy.Lysosomes are organelles that contain enzymes that

aid in the digestion.

Input

All cells have three main areas: the cell membrane, the cytoplasm, and the nucleus.

There are cells that are organisms onto themselves, such as microscopic amoeba and bacteria cells. 

There are cells that only function when part of a larger organism, such as the cells that make up your body. 

Summary:

Input: Science Standard 7.1.b and RC 2.1

Plant Cell vs. Animal CellAnimal Cell Plant Cell

Centrioles Cell wallChloroplasts

Cell membraneRibosomesGoldi apparatusEndoplasmic reticulumLysosomesVacuolesMitochondriaCytoskeleton

Unanswered QuestionsWrite down two questions you have about this

chapter!

Different PerspectivesPlant cells have a cell wall around

their plasma (cell) membrane, animal cells don’t.

Plant cells have chloroplasts for photosynthesis, animal cells don’t.

Animal cells have centrioles, which help in cell division, plant cells don’t

Patterns

Do animal cells contain cell walls?No!How is the nucleus like the manager of a company?The nucleus directs functions of the cells, just as manager directs functions of a company.

Modeling

Which cell has a cell wall plant or animal?

What is the function of the nucleus?

Check forUnderstanding

“Looking Inside Cells” Worksheet #3 and 16

Guided Practice

Independent Practice“Looking

Inside Cells” Worksheet #1-17