Cells Flashcards
Nucleus
command center; DNA
Mitochondria
energy factory
Ribosomes
make proteins
Centrioles
necessary for cell division
Chloroplasts
photosynthesis takes place in
Cytoplasm
gel-like substance where everything floats and moves
Diffusion
Movement of molecules from areas of higher concentration to areas of lower concentration
Passive transport
Movement along concentration gradient without energy
Osmosis
Process by which water molecules diffuse across a cell membrane from an area of higher concentration to an area of lower concentration
Requires no energy expenditure by cell 🡪 Passive Transport
Facilitated Diffusion
Proteins embedded in cell membrane help molecules that can’t move across the membrane rapidly enough, into or out of the cell.
Active transport
Movement of materials up concentration gradient from areas of lower concentration to areas of higher concentration
Requires cells to use energy
Endocytosis
process by which cells ingest external fluid, macromolecules, and large particles, including other cells
Exocytosis
vesicles in cytoplasm fuse with cell membrane releasing contents into external environment
Outside the cell (components)
Lipid bilayer, carbohydrate chains, proteins, transport proteins, and phospholipid
E.R
Transports proteins and lipids
