[PPT]Cell Structure & Function - Lake Stevens School District ... · Web viewCell Structure & Function Definition of Cell A cell is the smallest unit that is capable of...

Cell Structure & Function

http://koning.ecsu.ctstateu.edu/cell/cell.html

Definition of Cell

A cell is the smallest unit that is capable of performing life

functions.

Wednesday 10/1/14

Learning Target:Know the structure and function of the

cell organelles.Learning Outcome:

I will complete flashcard of cell organelles.

What are the 3 parts of the cell theory?

Examples of CellsAmoeba Proteus

Plant Stem

Red Blood Cell

Nerve Cell

Bacteria

“Typical” Animal Cell

http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif

http://waynesword.palomar.edu/images/plant3.gif

“Typical” Plant Cell

Cell Parts

Organelles – inside the cell

1. Nucleus • Controls cell processes – contains DNA

2. Nuclear Membrane

•Surrounds nucleus•Made of two layers•Provides support and protection for the nucleus

3. Chromatin• In nucleus• Made of DNA +

Protein which gives us chromosomes.

• Contain instructions for traits & characteristics

• (looks like cooked spaghetti)

http://library.thinkquest.org/12413/structures.html

4. Nucleolus• Inside nucleus• Produces ribosomes

for the cell (pink center in the drawing)

http://library.thinkquest.org/12413/structures.html

5.Nuclear Pores

• Holes which allow material to move into or out of the nucleus.

6.Cytoplasm• Fluid-like mixture• Supports the cell organelles.

Endoplasmic Reticulum

• 7.Smooth type (SER): lacks ribosomes. Contains enzymes to make lipids.

• 8.Rough type (RER) (pictured): ribosomes embedded in surface. Lipids and proteins are assembled for export from the cell.

http://library.thinkquest.org/12413/structures.html

9.Ribosomes• Each cell contains

thousands• Make proteins• Found on endoplasmic

reticulum & floating throughout the cell

• VERY SMALL!!

http://library.thinkquest.org/12413/structures.html

10.Mitochondria• Powerhouse of the cell• Converts the energy in

food to the energy that the cell can use (ATP).

http://library.thinkquest.org/12413/structures.html

11.Golgi Bodies• Modify, sort and

package protein.• Looks like a stack of

pancakes.

http://library.thinkquest.org/12413/structures.html

12.Lysosome• Contain enzymes to

break down proteins, fats, and carbs.

• Garbage collector of the cell.

http://library.thinkquest.org/12413/structures.html

13. Vacuoles• Membrane-bound

sacs for storage, digestion, and waste removal

• Contains water solution

• Help plants maintain shape

http://library.thinkquest.org/12413/structures.html

14. Chloroplast• Usually found in plant

cells• Converts sunlight into

plant food.• Where

photosynthesis takes place

http://library.thinkquest.org/12413/structures.html

15.Centrioles

• Aid in cell division –only 2 in cell

• Only found in animal cells.

Cytoskeleton

• 16. Microtubules – maintain cell shape and help form the spindle in cell division. (hollow)

• 17. Microfilaments – aid in movement and support. (solid)

18. Cell Wall

• Provides support and protection for a plant cell. Found only in plants.

19. Cell membrane

• Regulates what enters and leaves a cell• Provides protection and support for the

cell