Biology Unit 4: When a Bug Gives You the Runs

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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


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