Download Cell Features

Cell Features
Agriculture Biology
Board Work
 Name
two difference between a Light
Microscope and an Electron Microscope.
 Who is credited with discovering cells?
Activity Instructions
 Each
table needs to get a volunteer to grab
the three various sized cubes stationed in
the back
 Cube Width and Height:



1 cm
2 cm
3 cm
 Once
each group has the three potato
cubes work together to complete the
activity sheet.
 Record your information
Surface Area to Volume Ratio
60
50
40
30
Surface Area
20
Volume
10
0
Cube 1
Cube 2
Cube 3
Cell Theory
 All
living things are made of one or more
cells
 Cells are the basic units of structure and
function in organisms
 All cells arise from existing cells
Common Features of Cells
 The
cell interior is called the Cytoplasm
 Cytosol: fluid in the cytoplasm
 Microscopic fibers called the cytoskeleton
in the cytoplasm help suspend structures
 Ribosomes: cellular structure on which
proteins are made
Common Features of Cells
 Cell
membrane
 Encloses
cell
 Separates the cell interior from
surroundings
 Regulates what leaves and enters
 Gases nutrients and waste
Cell Membrane
Fluid not stiff
Cell Membrane Structure
 Made
of a double layer of phospholipids
 Called the lipid bilayer
Polar Head:
Made of phosphate group
Attracted to water
(hydrophilic)
Non-polar tails:
Made of two fatty acids
Repel water (hydrophobic)
The two types of Cells
 Prokaryotes



No nucleus
Cell Wall surrounding the membrane
No internal support skeleton
 Eukaryote



Has a nucleus
Cell membrane
Cytoskeleton
Prokaryotes
 Simple,
Singled Cell Organisms
 Example: Bacteria
 DNA is suspended in the cytoplasm
 Flagella: long structures to help move the
cell around.
Eukaryotic Cells
 Contains
a Nucleus
 Example: YOU, animals!
 DNA is housed in the Nucleus
 Contains Organelles:

Perform various activities
 Cilia:
Can help propel like flagella or
Move substances
