Cellular Transport Flashcards
What is the difference between active and passive processes?
Passive transport does not require ATP whereas active transport does.
Passive processes include…. ?
Simple diffusion, osmosis, filtration and facilitated diffusion.
Active processes include….?
Active transport and bulk transport
Bulk transport includes… ?
Endocytosis, exocytosis, pinocytosis and phagocytosis
All passive cell transport involves movement of particles along a concentration gradient. Particles move from ____ to _____ concentration
High to low
Movement of molecules from an area where they are concentrated to an area where they are less concentrated until an equilibrium is reached is know as what?
Simple diffusion
Describe osmosis
Movement of water through a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration
Movement of glucose and amino acids across the membrane by protein carriers, down their concentration gradient is called?
Facilitated diffusion
What is filtration?
Molecules are pushed across a membrane from high pressure to low pressure
Active transport is when a ______ ____ uses ___ to push ions _____ their concentration gradient.
Protein pump, ATP, against
Diffusion will occur faster if:
Temperature is increased
Concentration gradient increases
Molecules are small
Distance travelled is short
Endocytosis is a process where molecules are ingested by the cell. Name the two types of endocytosis and what they do.
Pinocytosis - “drinking” droplets of fluid
Phagocytosis - “eating” particles
Briefly describe exocytosis
Removal of substances from a cell. eg. for secretion
Describe the terms, isotonic, hypotonic and hypertonic
Isotonic - equal water in vs out of the cell
Hypotonic - more water into the cell than out of the cell
Hypertonic - less water into the cell than out of the cell
