Cell membrane/ Transport Test Flashcards
What is the function of the cell membrane?
Its function is to move things into and out of the cell
Passive transport can be best defined as?
Requires no energy
Active transport can be best defined as?
Requires energy
Diffusion can be best defined as?
The movement of molecules from an area of high concentration to an area of low concentration
Equlilbrium is best known as
When molecules are evenly spread throughtout a space
Osmosis can be best defined as?
The diffusion of water across a membrane
What are the three things that can pass the cell membrane
Water,Oxygen,and other small molecules
What cannot pass the cell membrane easily?
Salt and sugar
Define the term isotonic as well as describe what is happening to water and in turn what does this do to the cell
Means the same water moves in both directions and the cell stays plump
Define the term hypotonic as well as describe what is happening to the water and in turn what does this do to the cell
means more water moves in the cell causing the cell to burst
Define the term hypertonic as well as describe what is happening to the water and in turn what does this do to the cell
Means more and water moves out of the cell causing the cell to shrink
What does the term homeostasis mean
Maintaining balance or sameness
What is facilitated diffusion
Helper protein to move molecules across the cell membrane
What are the three types of passive transport
Diffusion,osmosis and facilitated diffusion
What does active transport require the cell to use
Energy (ATP)
What is endocytosis best known as
Taking in large molecules by the cell
What is exocytosis best defined as
Stuff exits the cell (Removing large particles wastes from the cell
What causes cystic fibrosis
Problems with the cell membrane
What does the term selectively permeable mean
Some things can pass but not other things
What is the function of a contractile vacuole
Can pump water out
What three mediums can diffusion occur across
Air, Water or across a cell membrane
What are three examples of diffusion
Food coloring in water
Perfume in the air
What is the rule for osmosis
if the area outside the cell as more salt then water will be sucked out of the cell towards the salt. water also follows the direction of salt
