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Cell Intro. Notes
Defining Life:
Does it
Does it
Does it
Does it
Does it
Does it
Does it
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Cell Theory
- All living organisms are composed of
.
.organisms (example: humans) are composed of many cells
.organisms (example: bacteria) are composed of only one cell.
- Cells are the smallest unit of life. They are the smallest structures capable of surviving
on their own.
- Cells come from
.cells and cannot be created from non-living material.
- Pasteur’s Experiment
Pasteur’s Experiment
1.
2.
3.
4.
Cell Size
-
.of cell responsible for exchange of nutrients and waste products
.of cell responsible for cellular functions (e.g. cell respiration)
Volume
- Determines the amount metabolism in the cytoplasm.
- Metabolism will require
. of precursors.
- Metabolism will result in the
. of secretions and excretory
products.
Surface Area
- Determines the exchange of materials between the cell and its environment.
.cells will metabolize more
- BUT
- So, what’s the problem?
- How do we fix this?
- ex.
- ex.
- ex.
- Multicellular examples
-
-
Prokaryotic vs. Eukaryotic
Prokaryotes
Eukaryotes
Nucleus
DNA
Histones
M.B. Organelles
Ribosomes
Animal vs. Plant
- Animal and plant cells contain some very specific organelles that the other does not
Animal
Magnification
Plant
Magnification = Size of image (Units must be the same)
Actual size
If a red blood cell has a diameter of 8 μm and a student shows it with a diameter of 40 mm in a
drawing, what is the magnification of the drawing?
A.
× 0.0002
B.
× 0.2
C.
×5
D.
× 5000
Organelles
See the worksheet handed out.