Cells Flashcards
Cell
Life’s basic unit of structure and function
Light Microscopes
Used to study stained or living cells
Electron Microscopes
Used to study detailed structure of a cell and can magnify up to 50.1^6 times but can only observe killed cells of specimens
Types of Cells
- Prokaryotes
- Eukaryotes
Eukaryotic Cells
Contains a nucleus and cytoplasm, that is filled with organelles
Types of Eukaryotic Cells
- Protists
- Fungi
- Animal Cells
- Plant Cells
Prokaryotic Cells
Lacks both a nucleus and organelles
Types of Prokaryotic Cells
Bacteria (Archaebacteria and Eubacteria)
Nucleoid
Area where the continuous strand of DNA is located in a prokaryote
Flagellum
Long tail that helps prokaryotes move
Plasma Membrane
A cell’s outer envelope
Peripheral Proteins
Proteins that are loosely associated with the lipid bilayer and are located on the inner or outer surface of the membrane
Integral Proteins
Proteins that are firmly bound to the plasma membrane and are amphipathic
Transmembrane Proteins
Integral proteins that do not extend all the way through the membrane
Fluid-Mosaic Model
Arrangement of phospholipids and proteins in the plasma membrane
Adhesion Proteins
Membrane proteins that form junctions between adjacent cells
Receptor Proteins
Membrane proteins that serve as docking sites for proteins of the extracellular matrix or hormones
Channel Proteins
Membrane proteins that form channels that selectively allow the passage of certain ions or molecules
Transport Proteins
Membrane proteins that form pumps that use ATP to actively transport solutes across the membrane
Recognition and Adhesion Proteins
Proteins that exposed on the extracellular surface that pay a role in cell recognition and adhesion
Carbohydrate Side Chains
Used to recognize other cells and substances
Cholesterol
Help stabilize membrane fluidity in animal cells
Nucleus
The control center of the cell
Chromosomes
Organized heredity information in the form of DNA
Nucleoulus
Where rRNA is made and ribosomes are assembled within the nucleus