Biology IMr. Nettles

Agenda- Wednesday, August 24, 2011

1. Warm Up – 5 min

1. Review Activity – 10 min

1. Daily Lesson – 20 min

1. Wrap Up (in teams) – 10 min

2. Begin Homework – 15 min

Today’s Objectives

• I will define the words: vacuole, cell wall, chloroplast, and centriole.

• I will define and describe the primary organelles of eukaryotic cells.

• I will articulate the differences between plant and animal cells.

Warm-Up

1. Define organelle.

1. Identify two differences between the ER and the Golgi apparatus.

2. Which organelle is responsible for breaking down dying organelles and food particles within cells?

Review: Come up with a school-related analogy for the different parts of the cell1. Nucleus - Central Office2. Nucleolus - Guidance Office3. Cytoplasm - ?4. Cell membrane - ?5. Ribosome - ?6. Endoplasmic Reticulum - ?7. Golgi apparatus - ?8. Mitochondria - ?9. Lysosomes - ?

Plant Cells vs. Animal Cells

Vacuoles (what they both have)

Definition: • fluid-filled sac

- Small in animal cells- Large in plant cells

Function: • Used to store materials needed by the cell like

water, food and enzymes- Supports heavy structures like leaves and flowers in

plants

Organelles found ONLY in Plants:

Cell Walls

Chloroplasts

Cell Wall

Definition: • A rigid layer that surrounds the cell membrane

Function: • To provide support and protection for the cell

- The cell walls of multiple cells can attach to one another to support the organism

- Cell walls are made of different materials depending on the organism

*Note: Cell walls are also found in prokaryotic cells.

Cell wall

Chloroplasts

Definition:• Are organelles that have a double membrane

and stacks of disc-like shapes containing chlorophyll

Function: • Use energy from the sunlight to make food for

the cell through the process of photosynthesis- Chlorophyll gives plants their green color- Like mitochondria because it provides energy

Chloroplast

PLANT CELL

Cell wall

Large vacuole

Chloroplast

Organelle found ONLY in Animals:

Centrioles

Centrioles

Definition:• Are barrel-shaped organelles composed mostly

of microtubules

Function: • Organize and transfer chromosomes and other

organelles during Meiosis and Mitosis• Serve as the construction point for cellular

microtubules

*Note: Centrioles are also found in some prokaryotic cells.

Centriole

Small vacuole

Centriole

Wrap-Up

1. Get in teams of two or three people.

1. Take out a sheet of paper to write your answers.

2. In the questions that follow, your team needs to “Name that Organelle”.

Question 1

I’m a real “powerhouse”That’s plain to seeI break down foodTo release energy

What am I? ______________________

Question 2

I’m strong and stiffGetting through me is toughI’m found only in plantsBut I guess that’s enough

What am I? _____________________

Question 3

I’m the brain of the cellOr so they sayI regulate cell activitiesFrom day to day

What am I? ____________________

Question 4

Found only in plant cells,I’m green as can beI make food for the plantUsing the sun’s energy

What am I? ______________________

Question 5

I’m a series of tubesFound throughout the cellI transport proteinsAnd other things as well

What am I? ___________________

Question 6

I’m full of holesFlexible and thinI control what gets outAnd what comes in

What am I? _________________

Question 7

Proteins are made hereEven though I’m quite smallYou can find me in the cytoplasmOr attached to E.R.’s wall

What am I? ______________________

Question 8

I’ve been called a “storage tank”By those with little tasteI’m a sac filled with waterFood, enzymes, or waste

What am I? ______________________

Question 9

Since I contain many enzymes,I can digest an injured cell;And can break down a large molecule Into a smaller one as well

What am I? ______________________