THE CELL Flashcards
It is the smallest unit that is capable of performing life functions.
Cell
The structural and functional unit of all living organisms
Cell
The building block of life
Cell
True or False:
All cells contain hereditary information necessary for regulating cell functions and for transmitting necessary information to the next cell generation?
True
True or False:
Vital functions of an organism don’t occur within cells
False
What are the Two (2) types of cells
PROKARYOTIC and EUKARYOTIC
- Do not have structures surrounded by membranes
- Few internal structures
- One-celled organisms
- bacteria, archae
PROKARYOTIC CELL
- Contain organelles surrounded by membranes
- Most living organisms
- multicellular organisms such as plants and animal cell
EUKARYOTIC CELL
What are the Cell Structures
- Plasma membrane
- Cytoplasm: cytosol + organelles
- Nucleus
◼ Outer membrane of cell that controls movement in and out of the cell
◼ Double layer
◼ Phospholipid bilayer
◼ Proteins (integral and peripheral)
◼ Cholesterol
◼ Attached carbohydrates (glycolipids and glycoproteins)
Plasma/Cell Membrane
Function:
* Barrier between inside and outside of cell
* Controls entry of materials: transport
* Receives chemical and mechanical signals
* Transmits signals between intra- and extra- cellular spaces
Plasma/Cell Membrane
Types of Cell Connections and Communications
GAP JUNCTION
DESMOSOME
TIGHT JUNCTION
When two cells are right next to each other, their cell membranes may actually be touching
GAP JUNCTION
They physically connect cells like the gap junction, but no opening is created
DESMOSOME
Happens when two membranes actually bond into one
TIGHT JUNCTION
