CELL STRUCTURE AND FUNCTIONCHAPTER 7

Objective: Identify the particular structures that underlie the cellular functions

Skill Statement: Identify organelles and other cellular structures within plant and animal cells

LIFE IS CELLULAR

The cell- a common structure that makes up every living thing

Cell theory All living things are composed of cells

Cells are the basic unit of structure and function in living things

New cells are produced from existing cells

BASIC CELL STRUCTURE

Cells come in many shapes and sizes

Despite differences in cell size and shape, certain structures are common to most cells Cell membrane

A thin flexible barrier around the cell

A lipid bilayer

Support and protect the cell, allows for interaction with the surroundings

Cell wall

A strong layer around the cell membrane

Support and protect the cell, allows for interaction with the surroundings

Nucleus

A large structure that contains the cells genetic material

Controls the cell’s activities

Cytoplasm

Jelly-like material inside the cell membrane

Contains important structures

List the numbers 1-10 on a paper

Get a microscope and go through each of the 10 slides. Write down your observations for each slide and include a detailed description- are there parts you

see? What does it look like? Make a small sketch of each slide

Make 2 columns on your paper and sort each slide number into a category of your choosing

Using the variety of pictures make Detailed observations of the physical characteristics

Separate the cell pictures into groups

Write down your observations

State your reasoning behind the formation of the groups

Are there any similarities between the slides and the pictures? Why or why not?

Review the slides and debate on the physical characteristics of each cell used to categorize them into two categories.(6) Once a common definition of prokaryote is created: simple, small, no nucleus, no organelles, first cell and eukaryotic: complex, large, nucleus, organelles and true cell. Use those terms to show students 10 new slides on the smart board/ppt presentation. Have students using their definition determine if these new and unknown slides are prokaryotic or eukaryotic. Optional--use an electronic response system to formatively assess if students can recognize the difference between these two different types of cells.(7) Conclusion--have students hypothesize what type of organisms are prokaryotic and eukaryotic--give them 2-3 minutes. Have students share out, the realization or goal is that only bacteria are prokaryotic and everything else is eukaryotic.

CELL TYPES

There are 2 categories of cells Prokaryote and Eukaryote

Prokaryote

Small and simple, unicellular- but still carry out activities for life: grow, reproduce, move, and respond to changes

Cell membrane and cytoplasm

No nucleus

Bacteria

Eukaryote

Large and multicellular

Cell membrane and cytoplasm

Nucleus

Other specialized structures called organelles- perform cellular functions

Plants, Animals, fungi, many microorganisms

COMPARE PROKARYOTES AND EUKARYOTES BY LISTING THE FEATURES OF EACH

Prokaryotes Eukaryotes

CONCEPT SORT

Main Concepts Cells- yellow

Basic cell structures-green

Prokaryote-orange

Eukaryote-blue

write what you understand or ask a question about each concept on the appropriate color

CAROUSEL

Send your work around to another student

Provide constructive feedback- make suggestions

CELL STRUCTURES