Transcript Cells

Cells
Objective:
I will examine
the parts of a cell.
Homework:
Study parts of the cell!
Warm up
1.Which best describes the difference between
unicellular and multicellular organisms?
a) Unicellular organisms have nuclei, while
multicellular organisms do not.
b) Unicellular organisms produce their own energy,
while multicellular organisms must get energy
from another source.
c) Unicellular organisms reproduce and then die,
while multicellular organisms can reproduce many
times.
d) Unicellular organisms carry out all life processes
within one cell, while multicellular organisms
contain cells that have specialized jobs.
2.What is the smallest unit of life called?
3.What are living things made of?
Agenda for Today
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Do Now
Review
Cells Scavenger Hunt
Introduction to cell organelles
Drillin and Killin Game (if time permits)
Cells video
Cells paragraph
Review
 Homeostasis:
Examples
 Requirements of living things
PARTS OF A CELL
Cell Theory
Robert Hooke was the scientist that discovered the
cell. Scientist summarized their observations
and evidence into 3 basic concepts known as
the cell theory.
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All living things are made of one or more cells.
A cell is the smallest unit of life.
All cells come from other living cells.
Prokaryote Cells
First cells to evolve
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No nucleus
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Hereditary info is
contained within
cytoplasm
Examples: Bacteria
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Eukaryotic Cells
Evolved from
prokaryotes
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Have a nucleus
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Hereditary info is
contained within the
nucleus
Examples: 1. Animals
2.Protists 3.Plants
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Eukaryotic Cells
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Eukaryotic Cells have many different specialized parts.
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Cell function is most dependent on the structure
of the cell.
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A cell’s structure will determine what function it performs
within an organism.
Think back to the previous lesson when you
learned that cells make up tissues that make
up organs. Cells in the heart (blood cells) are
expected to do different things than the cells
that make up your skin.
Eukaryotic Cell Diagram= Animal cell
Use 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”
Lysosome
Makes energy that can be used by the cell.
“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 Plant and
Animal Cells?
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Where do plants get there energy from?
Where to animals get there energy from?
Plant cells have central vacuoles, chloroplasts and a
cell wall that help them turn solar energy into food
and store their water.
Animal cells have none of the above. Instead of a central
vacuole, an animal cell has lysosomes that break
down materials (food) that are brought into the cell.
Exit slip
1. Cell function is most dependent on which cell characteristic?
a. size
b. shape
c. color
d. structure
2. Which is the primary function of mitochondria in animal cells?
a. to release energy
b. to provide support
c. to store materials
d. to transport waste
3. How do lysosomes function inside the cell?
a. Lysosomes manufacture proteins for the cell.
b. Lysosomes distribute enzymes throughout the cell.
c. Lysosomes assist the nucleus in DNA synthesis.
d. Lysosomes serve as the cell’s digestive system.
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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.
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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