( UNIT 2 ) Cells Flashcards
1
Q
Plasma membrane
A
- Common structure in every type of cell
- Selectively Permeable (Controls what comes in and out of the cell)
- Referred to as the “phospholipid bilayer” as it has two layers of phospholipids
2
Q
What are the two different categories of cells?
A
Prokaryotes and Eukaryotes.
3
Q
Prokaryotes
A
No nucleus or organelles.
4
Q
Eukaryotes
A
- Complex cell
- Has membrane bound organelles
5
Q
Why is the plasma membrane described as a fluid mosaic model?
A
- Fluid = things inside are able to move around
- Mosaic = Membrane looks like a pattern from above
6
Q
Describe the structure of the plasma membrane.
A
Has two layers of phospholipids (Phospholipid Bilayer)
- Phosphate heads located on the outer edges of the membrane as they are Polar ( hydrophilic : ability to dissolve in water ; “water loving” ).
- Lipid Tails are hidden inside the surrounding Phosphate heads as they are Non-polar ( hydrophobic : can’t dissolve in water ; “water phobic” ).
- Transport Protein : Transports substances in and out of the cell. Located in between the chains of phospholipids.
7
Q
Cell Wall
A
- Function: Support + Protect
- Found: Plants, Fungi, Prokaryotes
8
Q
Centrioles
A
- Function: Assists with cell division
- Found: Animals , most protists
9
Q
Chloroplast
A
- Function: Photosynthesis
- Found: Plants , some Protists
10
Q
Cilia
A
- Function: Movement, Feeding
- Found: Some Eukaryotes
11
Q
Cytoskeleton
A
- Function: Structure / Framework
- Found: Eukaryotes
12
Q
Endoplasmic Reticulum
A
- Function: Holds ribosomes
- Found: Eukaryotes
13
Q
Flagella
A
- Function: Movement , Feeding
- Found: Some Eukaryotes
14
Q
Golgi Apparatus
A
- Function: Modifies + packs proteins to send out of the cell
- Found: Eukaryotes
15
Q
Lysosome
A
- Function: Breaks down + digest unneeded structures using enzymes
- Found: Eukaryotes
