Tools And Cell Boundaries Flashcards
Most commonly used microscope
Compound microscopes
Scientists use
5
Computers, electronic balances, microscopes, telescopes, etc.
The metric system
Tables and graphs
Lab techniques
Compound microscope
2
Light passes through specimen
2 lenses form an image
A group of cells grown in a nutrient solution from a singled- celled original cell
Cell culture
Technique in which cells are broken into pieces and different cell parts are separated to study individually
Cell fractionation
Cell membrane
4
Regulates what enters and leaves cell
Provide protection and support
Composed of lipid bilayer
The layers include a mosaic of different proteins and carbs
Cell wall
4
Found in plants, algae, fungi, and many prokaryotes
Lies outside the membrane
Provides support and protection
Made mostly of cellulose
Diffusion
3
Random movement of molecules from high-low concentration
Rate depends on temp. And size of molecules
Continues until concentrations are equal
Protein channels in the cell membrane allow large molecules such as glucose to pass through easily
Facilitated diffusion
Osmosis
Diffusion of water across a selectively permeable membrane
Solute concentration equal inside and outside of the cells
Isotonic
Solute concentration higher outside than inside the cell. Water goes out cell shrinks
Hypertonic
Solute concentration lower outside than inside the cell. water goes in cell swells
Hypotonic
Active transport
2
Movement of molecules against a concentration gradient low-high
Requires energy using protein pumps
Cell membrane surrounds material and bring it into cell
Endocytosis
