7 th grade 3/12 do now: finish cell theory timeline
TRANSCRIPT
7th Grade3/12 Do Now:
Finish Cell Theory TimeLine
Cell Theory:
Hooke – first person to discover and name cells
Schleiden – discovers plants are made of cells
Schwann – discovers animals are made of cells
Virchow – discovers cells come from other cells
Cell Theory
How does Cell Theory answer these questions:– What makes something alive?– What do cells do?– Where do cells come from?
THE CELL
COMMON CELL TRAITS
A cell is the smallest unit that is capable of performing life functions.
COMPARING CELLS
The size & shape of a cell relates to its function. (job it does)
Prokaryotic Cells(proh KAYR ee yah tihk)
cells without membrane-bound structures
EX: bacteria
pond scum
7th Grade3/13 Do Now
Color and label the picture of the animal cell and plant cell for the following parts of the cell:– Cell membrane – orange– Cytoplasm – sky (light) blue– Cell wall – yellow green
Eukaryotic Cells(yew KAYR ee yah tihk)
cells with membrane-bound structures
EX: animals, plants, fungi and protists
protects the cell gives shape is made of cellulose A cell wall is found in plants, algae, fungi, & most
bacteria.
CELL WALL
CELL MEMBRANE
Outer covering, protective layer around ALL cells
For cells with cell walls,the cell membrane is inside the cell wall
Allows food, oxygen, & water into the cell & waste products out of the cell.
CYTOPLASM
gelatin-like inside cell membrane constantly flows aka protoplasm
CYTOSKELETON
scaffolding-like structure in cytoplasm
helps the cell maintain or change its shape
made of protein
Organelle Foldable
Take a piece of paper and fold it lengthwise (hot dog).
At the top label: Cell Organelles On the same side cut the paper into 7 flaps
(approximately 4 lines) Label the 7 flaps: ribosome, chloroplast,
mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome.
On the inside, define and draw the organelle.
Organelle Foldable
Take a piece of paper and fold it lengthwise (hot dog).
At the top label: Cell Organelles On the same side cut the paper into 7 flaps
(approximately 4 lines) Label the 7 flaps: ribosome, chloroplast,
mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome.
On the inside, define and draw the organelle.
NUCLEUS
Directs all cell activities Contains instructions
for everything the cell does
These instructions are found on a hereditary material called DNA
Usually the largest organelle
NUCLEAR MEMBRANE
separates nucleus from cytoplasm
controls movement of materials in & out of nucleus
NUCLEOLUS
Aka “little nucleus” Found in the nucleus
CHROMATIN
contains genetic code that controls cell made of DNA & proteins
NUCLEUS
Directs all cell activities Contains instructions
for everything the cell does
These instructions are found on a hereditary material called DNA
Usually the largest organelle
NUCLEAR MEMBRANE
separates nucleus from cytoplasm
controls movement of materials in & out of nucleus
NUCLEOLUS
Aka “little nucleus” Found in the nucleus
CHROMATIN
contains genetic code that controls cell made of DNA & proteins
ENDOPLASMIC RETICULUM A series of folded membranes
that move materials (proteins) around in a cell
like a conveyor belt Smooth ER – ribosomes not
attached to ER Rough ER – ribosomes
attached to ER
RIBOSOMES Make proteins Float freely or attached to the
endoplasmic reticulum (ER) Ribosomes are made in the
nucleolus
GOLGI BODIES (GAWL jee)
Stacked flattened membranes
Sort and package proteins
VACUOLES
Temporary storage spaces
Store food, water, waste
LYSOSOMES (LI suh sohmz)
The word "lysosome" is Latin for "kill body." The purpose of the lysosome is to digest things.
They might be used to digest food or break down the cell when it dies.
Break down food molecules, cell wastes & worn out cell parts
CHLOROPLASTS
Green organelles that make food
found only in plant cells
CHLOROPHYLL
A green pigment that gives leaves & stems their color
Captures sunlight energy that is used to produce food called glucose
Glucose is a type of sugar
MITOCHONDRIA Organelles that release
energy from food This energy is released by
breaking down food into carbon dioxide
AKA the powerhouse b/c they release energy from food
Some muscle cells have 20,000 mitochondria