Cell Biology Flashcards
General Bio
Organelles & Functions
Nucleus
Stores DNA, controls gene expression
Organelles & Functions
Mitochondria
Produces ATP through cellular respiration
Organelle & Functions
Ribosomes
Synthesizes proteins
Organelle & Functions
Rough Endoplasmic Reticulum (ER)
Protein synthesis (contains ribosomes)
Organelles & Functions
Smooth Endoplasmic Reticulum (ER)
Lipid synthesis, detoxification
Organelles & Functions
Golgi Apparatus
Modifies, packages, and transports proteins
Organelles & Functions
Lysosomes
Digest waste and worn-out organelles
Organelles & Functions
Cell Membrane
Semi-permeable barrier regulating transport
Transport Across Membranes
Simple diffusion
Passive movement of small, nonpolar molecules (O2, CO2)
Transport Across Membranes
Facilitated diffusion
Uses transport proteins (e.g., glucose, ions)
Transport Across Membranes
Osmosis
Movement of water through a selectively permeable membrane
Transport Across Membranes
Active transport
Requires ATP (e.g., sodium-potassium pump)