Biology Unit 4: When a Bug Gives You the Runs
active transport
A process in which energy is used by proteins to transport materials in and out of the cell against a concentration gradient
cell theory 3
All cells come from pre-existing cells
cell theory 1
All living things are composed of one or more cells
passive transport
Any process in which materials move in and out of the cell without using cellular energy
cell theory 2
Cells are the basic unit of structure and function in living things
diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration
osmosis
Movement of water across a membrane from a higherconcentration to a lower concentration
Who were the scientists responcible for cell theory 1?
Schieden (plants) Schwann (animals)
homeostasis
The ability of and need for the body to maintain constant, internal conditions
facilitated diffusion
The use of carrier proteins for diffusion
endocytosis
Use of vesicles (and energy/ATP) to transport large substances into the cell
exocytosis
Use of vesicles (and energy/ATP) to transport large substances out of the cell
Who were the scientists responcible for cell theory 2?
Virchow
In the cell membrane diagram below, what process(es) could be used to transport the hexagons in the direction of the arrow? (choose all that apply)
active transport
how are protiens like insulin passed through the cell membrane?
active transport
how is ions (like in the Na+/K+ pump) active transport B passed through the cell membrane?
active transport
how is glucose passed through the cell membrane?
facilitated diffusion
Which of the following always use or can involve the use of transport proteins? (choose all that apply)
osmosis, sctive transport, and facilitated diffusion
In the cell membrane diagram below, what process(es) could be used to transport the circles in the direction of the arrow? (choose all that apply)
passive transport, facilitated diffusion, and simple diffusion
how are gasses passed through the cell membrane?
simple diffusion
how are small, nonpolar molecules passed through the cell membrane?
simple diffusion
