1. How would Redi have benefitted if he would have known about the cell theory?

2. Which scientist(s) would have been most interested in the study of a rare vine that grows on the trees in Louisiana?

3. Why does each organelle have such unique structures from one another?

3/25 Daily Catalyst Pg. 39 Organelles

Quiz #9 on Friday Cell Theory Scientists of the cell theory Organelles

Test Corrections due Monday Report card extra credit

3/25 Class Business Pg. 39 Organelles

What do you get when you cross a snowman with a vampire?

Frostbite.

Joke

Daily Catalyst Class Business Organelle notes Plant vs. animal cell Exit Ticket #9 Homework: study organelles

3/25 Agenda Pg. 39 Organelles

Bridge presentation

Identify and describe structural and

functional differences among organelles.

3/25 Daily Objective Pg. 39 Organelles

The cell membrane gives plant and animal cells shape AND controls what comes in or out of the cell

Key Point #1: “The bouncer

The cell membrane is selectively permeable. What does this mean?!

Cell Membrane

Key Point #2: Selectively/semi Permeable Only certain molecules are allowed to enter and exit the

cell

How is the cell membrane so selective?

Cell Membrane

Question: What happens when I shake the water bottle?

Hypothesis:

Why does this happen?

Class Demo

Key Point #3: Membranes have a bilayer (two layers) Protection in and out side of the cell

Cell membrane

Key Point #4: Membranes are made of phospholipids, a type of fat (With a marker, draw and label the phospholipid)

Cell Membrane

HEADHydrophilic: <3 water

TAILSHydrophobic:Hates water

How is the membrane beneficial to the cell?

The membrane regulates what will enter and leave the cell.

Turn and Talk

The nucleus is the command center of the cell Key Point #5:

“Command center” Surrounded by the nuclear membrane Houses the DNA and RNA Purpose of nuclear membrane?

To protect the nucleus and control what comes in or out of the nucleus

Structure? Phospholipids too!

Nucleus

Key Point #6: “The jello” Composed of mainly water and salts Important for transport (next week)

Cytoplasm

Ribosomes, endoplasmic reticulum, and Golgi apparatusKP#7: Protein creation: RibosomesEndoplasmic

ReticulumGolgi Apparatus

MEMBRANES that allow proteins to pass in and out

Power plants

Chloroplasts Inner and outer

membranesMitochondria

Inner and outer membranes

Key point #8: folded membranes to

increase surface area = efficiency!

Plants Plants and Animals

Sum of the total area Key Point #9: A greater surface area allows

for organelles to be more efficient

Surface Area???

What do plants and animal cells have in common?

Plants Animals

Both

Directions: Using your notes, correctly color the plant and animal cells. You may want to label the organelles as a review for Friday’s quiz.

Noise: 1 (with partner)

Time: 15 minutes

Plants vs. animals

Directions: I will display information about plant or animal cells. You will move to the side of the room with the correct answer. Animals are in the front. Plants are in the back. Both, plants and animals is in the center of the class.

Walk and keep talking down

Cell Review

Contains a cell wall

PLANTS

Cell Review

Contains RibosomesBOTH

Cell Review

Contains Lysosomes

BOTH

Cell Review

EukaryoticBOTH

Cell Review

Contains a Mitochondria

BOTH

Cell Review

Contains a ChloroplastPLANTS

Cell Review

Contains a nucleusBOTH

Cell Review

The 4 scientists involved with the cell theory The cell theory Major organelles discussed today

Partner Review

Name: ______ Period: 1 Date: 3/25 Score: ___/4Exit Ticket #8

1. How did Redi’s experiment prove that only cells come from preexisting cells from the cell theory?

2. What is the nickname for the ribosomes? 3. What was Hooke observing when he coined the term

“cells”? 4. True or false, plants cells contain a cell wall like an animal

cell. 5. What is the purpose of the cytoplasm? 6. If a plant cell wall loses all of its water, what organelle is

not functioning properly? 7. What is the purpose of membrane bound organelles? 8. Draw and label a phospholipid.