The Cell in its Environment

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Presentation transcript:

The Cell in its Environment © 2008 susan anderson

The Selectively Permeable Membrane Only lets certain things in and out. Diffusion Moves from higher concentration to lower Doesn’t require energy Desires equilibrium Heat and Pressure can speed this up

Homeostasis

Diffusion

The Selectively Permeable Membrane Osmosis The diffusion of WATER Does not take energy Desires equilibrium Isotonic solution Hypertonic solution Hypotonic solution

The Selectively Permeable Membrane Active Transport Requires energy Goes against the Gradient Uses transport proteins Engulfing

Active Transport

Photosynthesis and Respiration

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