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20 Cards in this Set

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  • Back
Nucleus
contains and protects DNA, transcription, partial assembly of ribosomes, splicing
Mitochondria
Produce ATP via Krebs, oxidative phosphorylation
Ribosomes
synthesize proteins
Rough Endoplasmic Reticulum
synthesis and modification of secretory membrane bound and organelle proteins
Smooth Endoplsmic reticulum
detoxification and glycogen breakdown in liver, steroid synthesis in gonads
Golgi Apparatus
modification and sorting of protein, some synthesis
Lysosomes
contain acid hydrolases which digest various substances
Peroxisomes
metabolize lipids and toxins using peroxide
What can cross lipid bilayer?
nonpolar, small uncharged polar molecules
What cant cross lipid bilayer?
large polar and charged molecules
Passive transport
moves down concentration gradient, doenst require energy
Active transport
moves against concentration gradient, requires cellular energy
Diffusion
Movement of a substance from higher to lower concentration
Osmosis
diffusion of water, water always moves towards higher concentration of solute
Facilitated diffusion
Transport proteins moving solute along concentration gradient
Uniports
transport one molecule across membrane at a time
Symports
carry two substances across membbrane in same direction
Antiports
carry two substances in opposite directions
Primary active transport
driven by ATP hydrolysis
Secondary active transport
not coupled directly to ATP, but to ion gradients