Flashcards in Cell Organelles Deck (118)
What are cells?
Small units bound by a plasma membrane
Cells contain an aqueous fluid called
Cells contain chemicals in the
Cells have structural support called the
All cells are surrounded by a
The plasma membrane is a
The plasma membrane is
What is the difference between the intracellular and extracellular fluid?
The intracellular fluid is found inside the cell and the extracellular fluid is found outside the cell
What is the cytosol?
The aqueous component of the cytoplasm of a cell within which various organelles and particles are suspended
The plasma membrane is a complex of...
List four carbohydrates which make up the plasma membrane
Why is the plasma membrane selectively permeable?
because lipids are amphipathic
What does amphipathic mean?
A molecule especially a protein which has both a hydrophilic and hydrophobic part
What model is used to describe the plasma membrane?
The fluid mosaic model
What allows hydrophilic solutes to be transported across the plasma membrane?
Integral and peripheral membrane proteins
What are peripheral membrane proteins?
Peripheral membrane proteins stay on the perimeter of other membrane proteins
What are integral proteins?
Proteins integrated into the membrane
What are transmembrane proteins?
Proteins that transfer across the entire membrane
What is a cell wall?
Surrounds the plasma membrane - limits passage of molecules into / out of the cell
What are plant cell walls composed of?
What is cellulose made of?
Complex carbohydrates which have to be digested by cellulase - animals don't have this
What are bacteria cell walls composed of?
Bacterial cell walls can be surrounded by a
gelatinous polysaccharide layer - glycocalyx as either capsule or slime layer
Bacterial cell walls can be stained to distinguish between gram pos and gram neg by which staining method?
What is the difference in layers to gram pos and gram neg bacteria?
Gram positive bacteria have a single layer in the cell wall, gram negative bacteria have several layers to the cell wall
What are the cell surface appendages and where do they attach?
Attach to the plasma mem/cell wall
Which cell surface appendages help move the cell?
Flagella or cilia
Which cell surface appendage help move extracellular fluid
Which cell surface appendages aid in increasing the cell's surface area?