Unit 2 cells Flashcards
Animal cells often secrete glycoproteins as extracellular components. What is the role of these glycoproteins?
Adhesion
A red blood cells is 8 micrometers in diameter. If drawn 100 times larger then its actual size what diameter will the drawing be in mm?
0.8mm
What is osmosis?
The movement of water through a membrane from a low to a high solute concentrations
What happens to the surface area to volume ratio as a cell grows?
It descreases
What features are present in prokaryotic cells?
Pili, DNA, and cell wall
What process requires channel proteins?
Facilitated diffusion
What distinguishes prokaryotic cells from eukaryotic?
Prokaryotic have no internal membrane compartments and eukaryotes have internal membrane compartments
Which process is possible due to the fluidity of cell membranes?
Endocytosis
Cell theory?
- Cells are the smallest unit of life
- All cells come from pre existing cells
- All organisms have one or more cells
What provides evidence for endosymbiotic theory?
Mitochondrial DNA in eukaryotic cells
What do diffusion and osmosis have In common?
They are passive transport mechanisms
Cells in the adrenal gland produce the hormone epinephrine and store it in vesicles. To release epinephrine these vesicles are carried to the plasma membrane and fuse w/ it. What process is occuring?
Exocytosis
Functions of membrane proteins?
Cell to cell communication and protein pumps
What is function of Pili?
Attachment
What route is used to export proteins from cell?
Rough endoplasmic reticulum –> Golgi apparatus –> plasma membrane
