Do Now List and define all the life functions

Cell Structures, Functions and Transport Objectives: 1. Explain cell theory. 2. Compare /contrast Prokaryotic and eukaryotic cells. 3. Identify cell organelles 4. Differ between animal and plant cells

Definition of Cell A cell is the smallest unit of life that can perform ALL the life functions.

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

Examples of Cells Amoeba Proteus Plant Stem Red Blood Cell Nerve Cell Bacteria

Two Types of Cells Eukaryotic Prokaryotic

Prokaryotic Cell Prokaryotes –No nucleus –No membrane bound organelles –Unicellular –Some have cilia (hair-like structures) and some flagella (whip-like tail) for movement. Example: Amoeba, bacteria

Eukaryotic Cell Contain organelles surrounded by membranes Most living organisms, (multicellular) PlantAnimal

Prokaryotes vs. Eukaryotes Prokaryotes No nucleus No organelles Bacteria Much smaller Unicellular Cilia flagella Eukaryotes Nucleus Organelles Unicellular (protists) and multicellular (animal and plants) Amoeba Plant Cell

Animal Cell Plant Cell /~ acarpi/NSC/images/cell.gif

Cell Parts Organelles little organs inside of a cell. They are used to: transport of materials capture and release energy Building proteins waste disposal Send and receive information movement Cell membrane Cell wall cytoplasm Nucleus Chromosomes Endoplasmic reticulum Smooth / rough Ribosomes Mitochondria Golgi bodies Vacuoles Lysozome Chloroplast

Section 7-2 Figure 7-5 Plant and Animal Cells Go to Section: Animal Cell

Cell membrane Nickname: “The Fence” Function: Controls movement in and out of the cell Eukaryotic Cell Organelles and Function

Nucleus Nickname: “The Control Center” Function: holds the DNA

Eukaryotic Cell Organelles and Function Ribosomes Nickname: “Construction Workers” Function: makes proteins Found in all cells, prokaryotic and eukaryotic

Eukaryotic Cell Organelles and Function 3. Endoplasmic Reticulum (ER) Nickname: “Cellular Highway” Function: The internal delivery system of the cell

Endoplasmic Reticulum 2 Types: 1. Rough ER: Rough appearance because it has ribosomes Function: helps make proteins, that’s why it has ribosomes 2. Smooth ER: NO ribosomes Function: makes fats or lipids

Eukaryotic Cell Organelles and Function Golgi Bodies Nickname: The Post office Function: packages, modifies, and transports materials to different locations inside/outside of the cell. Appearance: stack of pancakes

Eukaryotic Cell Organelles and Function 5. Lysosomes: circular, but bigger than ribosomes) Nickname: “Cellular Stomach” Function: digests food into small particles the rest of the cell can use and to destroy old cells.

Eukaryotic Cell Organelles and Function 6. Mitochondria Nickname: “The Powerhouse” Function: Energy formation Breaks down food to make ATP ATP: is the major fuel for all cell activities that require energy

Section 7-2 Figure 7-5 Plant and Animal Cells Go to Section: Plant Cell Now let’s talk about structures only found in PLANT Cells!!

Eukaryotic Cell Organelles and Function Vacuoles Function: stores water This is what makes lettuce crisp When there is no water, the plant wilts Found in animal cells too, but much smaller.

Eukaryotic Cell Organelles and Function 8. Chloroplasts Function: traps energy from the sun to produce food for the plant cell Green in color because of chlorophyll, which is a green pigment

Eukaryotic Cell Organelles and Function 9. Cell Wall Function: provides support and protection to the cell membrane Found outside the cell membrane in plant cells

Plant vs. Animal Cells Plants Cell wall Chloroplasts Large vacuole Animals Cell membrane Smaller vacuoles Centrioles- help organize cell division.

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Practice questions Directions: Describe three differences between the STRUCTURES of Animal and Plant Cells. (Do not say one is found in animals and one is found in plants!!!!!) __________________________________ ________________________________ ________________________________

List the three parts of the cell theory. 1______________________________ 2_______________________________ 3______________________________