| Life does not come from
nonliving matter.
|
| Cell membrane – thin
layer of lipid and protein that separates cell from world.
|
| Bilayer – two phospholipid layers
in cell membrane.
|
| Fluid mosiac model – modern view
of cell membrane structure.
|
| Prokaryotes – organisms that don’t
contain nucleus.
|
| Eucaryotes – organisms that always
contain a nucleus.
|
| Cytoplasm – everything between
cell membrane and nucleus.
|
| Chromosomes – coded blueprints in
nucleus that control all cell activity.
|
| Proteins – made by
ribosomes.
|
| Endoplasmic reticulum (ER) –
contains poisons, wastes and other toxic chemicals.
|
| Golgi apparatus – packaging and secreting of cell products. |
| ATP
– energy-storing molecule of the cell made in the mitochondrion. |
5.4 Cell Diversity
| Most important difference between plant
and animals – presence of cell wall in plants.
|
| Chloroplast – organelle that
converts sunlight, carbon dioxide and water into sugars.
|
| Cytoskeleton – maintains 3-dimensional structure of cell and helps it move. |
| Flagella
– long, whip like projections. |
5.5 Crossing the Membrane
| Diffusion – movement of
molecules from an area of high concentration to area of low concentration. |
| Molecules diffuse faster at higher
temperatures than at lower temperatures.
|
| Smaller molecules diffuse faster than
larger molecules.
|
| Isotonic solution – concentration of solutes inside and
outside of cell are equal. |
| Bulk transport – large molecules, food and other substances are packaged in membrane-bound sacs and moved across the membrane. |