CellsCells

Objective:Objective: I will I will examine the parts of a examine the parts of a cell.cell.

Homework:Homework:

Study parts of the cell!Study parts of the cell!

Warm upWarm up1.Which 1.Which bestbest describes the difference between describes the difference between

unicellular and multicellular organisms?unicellular and multicellular organisms?a)a) Unicellular organisms have nuclei, while Unicellular organisms have nuclei, while

multicellular organisms do not.multicellular organisms do not.b)b) Unicellular organisms produce their own Unicellular organisms produce their own

energy, while multicellular organisms must energy, while multicellular organisms must get energy from another source.get energy from another source.

c)c) Unicellular organisms reproduce and then Unicellular organisms reproduce and then die, while die, while multicellular organisms can multicellular organisms can reproduce many times.reproduce many times.

d)d) Unicellular organisms carry out all life Unicellular organisms carry out all life processes within one cell, while processes within one cell, while multicellular organisms contain cells that multicellular organisms contain cells that have specialized jobs.have specialized jobs.

2.What is the smallest unit of life called?2.What is the smallest unit of life called?3.What are living things made of?3.What are living things made of?

Agenda for TodayAgenda for Today

Do Now Do Now Review Review Cells Scavenger HuntCells Scavenger Hunt Introduction to cell organellesIntroduction to cell organelles Drillin and Killin Game (if time Drillin and Killin Game (if time

permits)permits) Cells video Cells video Cells paragraphCells paragraph

ReviewReview

Homeostasis: ExamplesHomeostasis: ExamplesRequirements of living Requirements of living

thingsthings

PARTS OF A PARTS OF A CELLCELL

Cell TheoryCell Theory

Robert Hooke was the scientist that Robert Hooke was the scientist that discovered the cell. Scientist summarized discovered the cell. Scientist summarized their observations and evidence into 3 their observations and evidence into 3 basic concepts known as the basic concepts known as the cell theorycell theory..

1.1. All living things are made of one or more All living things are made of one or more cells.cells.

2.2. A cell is the smallest unit of life.A cell is the smallest unit of life.

3.3. All cells come from other living cells.All cells come from other living cells.

Eukaryotic CellsEukaryotic Cells

First cells to evolveFirst cells to evolve No nucleusNo nucleus Hereditary info is Hereditary info is

contained within contained within cytoplasmcytoplasm

Examples: BacteriaExamples: Bacteria

Prokaryote CellsProkaryote Cells

Evolved from Evolved from prokaryotesprokaryotes

Have a nucleusHave a nucleus Hereditary info is Hereditary info is

contained within the contained within the nucleusnucleus

Examples: 1. Animals Examples: 1. Animals 2.Protists 3.Plants2.Protists 3.Plants

Eukaryotic CellsEukaryotic Cells Eukaryotic Cells have many different Eukaryotic Cells have many different

specialized parts.specialized parts. Cell function is most dependent on the Cell function is most dependent on the

structure of the cell.structure of the cell. A cell’s structure will determine what function it A cell’s structure will determine what function it

performs within an organism.performs within an organism.

Think back to the previous lesson when you Think back to the previous lesson when you learned that learned that cellscells make up make up tissuestissues that that

make up make up organsorgans. Cells in the heart (blood . Cells in the heart (blood cells) are expected to do different things cells) are expected to do different things

than the cells that make up your skin.than the cells that make up your skin.

Eukaryotic Cell Diagram= Eukaryotic Cell Diagram= AnimalAnimal cellcellUse this diagram to fill out your diagram.

Eukaryotic Cell Parts Function

Cell Membrane

“Door”

Provides a barrier between the cell and its environment. All nutrients and waste

move across the cell membrane.

Nucleus“Brain”

Controls the functions of the cell. Acts as the “brain” of the cell.

Mitochondria“Duke power”

Makes energy that can be used by the cell.

Lysosome

“Digestive system”

Breaks down waste into a form that can be removed from the cell. Breaks down the

cell itself if the cell is damaged or old.

Endoplasmic Reticulum “subway”

Transports nutrients and waste within the cell.

Vacuoles“Water bottle”

Holds water transported into the cell until used by the cell.

Differences Between Differences Between Plant and Animal Cells?Plant and Animal Cells?

Where do plants get there energy from?Where do plants get there energy from? Where to animals get there energy from?Where to animals get there energy from?

Plant cellsPlant cells have have central vacuoles, chloroplasts central vacuoles, chloroplasts and a cell wall and a cell wall that help them turn solar that help them turn solar energy into food and store their water. energy into food and store their water.

AnimalAnimal cells have none of the above. Instead of a cells have none of the above. Instead of a central vacuole, an animal cell has central vacuole, an animal cell has lysosomeslysosomes that break down materials (food) that are that break down materials (food) that are brought into the cell.brought into the cell.

Exit slipExit slip1. Cell function is 1. Cell function is most dependentmost dependent on which cell on which cell

characteristic?characteristic?a. sizea. sizeb. shapeb. shapec. colorc. colord. structured. structure

2. Which is the primary function of mitochondria in 2. Which is the primary function of mitochondria in animal cells?animal cells?a. to release energya. to release energyb. to provide supportb. to provide supportc. to store materialsc. to store materialsd. to transport wasted. to transport waste

3. How do lysosomes function inside the cell?3. How do lysosomes function inside the cell?a. Lysosomes manufacture proteins for the cell.a. Lysosomes manufacture proteins for the cell.b. Lysosomes distribute enzymes throughout the cell.b. Lysosomes distribute enzymes throughout the cell.c. Lysosomes assist the nucleus in DNA synthesis.c. Lysosomes assist the nucleus in DNA synthesis.d. Lysosomes serve as the cell’s digestive system.d. Lysosomes serve as the cell’s digestive system.

Step 1: Holding an 8 1/2" x 11" paper horizontally, fold both ends in so they meet, but do not overlap.

Step 2: Draw, color, and label the outside left flap as a plant cell and the outside right flap as an animal cell.  

Next Slide will show you an example of how the outside of your foldable should be.

Step 3: With your paper flat (flaps open), you will have three sections formed by your folds. The far left section will be for plant cell differences, the far right section for animal cell differences, and the center for similarities between plant and animal cells. In each of these sections, cell organelles will be listed and defined.

Next page will have a picture example of how the inside should be down