Unit 2 Flashcards

Front

diffusion

Back

movement of particles (like oxygen or sugar) move from high concentration (crowded) to low concentration (empty)

Front

osmosis

Back

movement of WATER across a membrane from an area of high water concentration to low water concentration

Front

cell membranes

Back

selectively permeable organelle that allows only certain molecules to pass through its spaces

Front

passive transport

Back

movement of molecules without using energy (both osmosis and diffusion are passive)

Front

Which direction does water move during osmosis?

Back

from a region of higher water concentration to one of lower concentration.

Front

equilibrium

Back

when the particles are evenly distributed, and there's no overall movement in any direction

Front

When someone sprays perfume in one corner of a room, the scent starts out strong there. The perfume smell spread through the air until the scent is evenly distributed. Is this an example of osmosis or diffusion?

Back

Diffusion

Front

When you place a gummy bear in plain water, water moves into the gummy bear through its surface. The gummy bear swells up. Is this osmosis or diffusion?

Back

Osmosis

Front

When students move from a crowded classroom to an empty hallway. Is this an example of osmosis or diffusion?

Back

Diffusion

Front

unicellular

Back

simple, microscopic one-celled organism; must carry out all life processes within one cell