Cell Transport Flashcards
Diffusion
Passive
Non selective
High concentration to low
Big soluble things or small non-soluble
Ex. Oxygen or carbon dioxide
Osmosis
Passive
Selective
Diffusion of water in selectively permeable membranes
Facilitated diffusion
Passive
Selective
Uses channel proteins to transport larger molecules
Ex. Glucose
Vesicular/ Bulk Transport
Large multi molecular things
Large amounts of material using vesicles
3/4 are non selective
Primary active transport
Active (Uses ATP)
Selective
Hydrogen + ATP attach to pump (membrane protein)
Secondary Active Transport
Selective
First molecule goes against gradient while second goes down with
Uses energy not ATP
Phagocytosis
Endocytosis (bulk active transport)
Non selective
Pseudopods engulf large things and enclose them in vesicle
Ex. Amoeba eating
Pinocytosis
Endocytosis(bulk active transport)
Non selective
Fluids enter and break off once full like a droplet
Ex. Human egg cells
Receptor Mediated Endocytosis
Bulk active transport
Selective
Once receptors are full of molecules vesicle forms
Humans taking in cholesterol
Exocytosis
Bulk active transport
Non selective
Rapid expulsion of waste
Opposite of pinocytosis
Ex. Stomach getting rid of mucus