Passive = not active (no energy) Transport = moving

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Presentation transcript:

Passive = not active (no energy) Transport = moving 5.1 Passive Transport pp. 95-99 *Passive Transport = materials crossing the cell membrane with no energy needed Passive = not active (no energy) Transport = moving *Diffusion and osmosis are passive transport What other things are passive in how they get things done?

*equilibrium = net diffusion is the same in all directions 5.1 Passive Transport pp. 95-99 *Diffusion = movement of molecules from an area of high concentration to an area of low concentration High Low Diffusion moves in all directions. Net diffusion is the overall change. *equilibrium = net diffusion is the same in all directions What other kinds of things go from high to low?

Membrane (cross section) Fig. 7-11a Molecules of dye Membrane (cross section) WATER Net diffusion Net diffusion Equilibrium (a) Diffusion of one solute

(b) Diffusion of two solutes Fig. 7-11b Net diffusion Net diffusion Equilibrium Net diffusion Net diffusion Equilibrium (b) Diffusion of two solutes

Osmosis = diffusion of water from high to low 5.1 Passive Transport pp. 95-99 Osmosis = diffusion of water from high to low Think of sugar in kool aid Put a cell in kool aid

So more water goes into cell 5.1 Passive Transport pp. 95-99 *Hypotonic = solution outside cell has lower concentration of dissolved particles than inside cell Hypo = below, less Tonic = solution So more water goes into cell OUT: Draw a hypotonic solution with dots showing the particles.

So more water goes out of cell 5.1 Passive Transport pp. 95-99 *Hypertonic = solution outside cell has higher concentration of dissolved particles than inside cell Hyper = above, more Tonic = solution So more water goes out of cell OUT: Draw a hypertonic solution with dots showing the particles.

So more water goes in and out of cell at equal rate 5.1 Passive Transport pp. 95-99 *isotonic = solution outside cell is equal in concentration of dissolved particles to that inside cell iso = same Tonic = solution So more water goes in and out of cell at equal rate OUT: Draw an isotonic solution with dots showing the particles.

cell cell Hypotonic solution Isotonic solution Hypertonic solution H2O Fig. 7-13 Hypotonic solution Isotonic solution Hypertonic solution H2O H2O H2O H2O (a) Animal cell Lysed Normal Shriveled H2O H2O H2O H2O (b) Plant cell Turgid (normal) Flaccid Plasmolyzed

…. = water = sugar (or any solute) Water flows high to low 5.1 Passive Transport pp. 95-99 …. = water = sugar (or any solute) Water flows high to low

*Facilitated diffusion = passive transport that needs a door… 5.1 Passive Transport pp. 95-99 *Facilitated diffusion = passive transport that needs a door… Molecules that are too large to pass easily through the membrane can pass through carrier proteins *Carrier proteins = proteins in the membrane that allow certain chemicals to pass

5.1 Passive Transport pp. 95-99

5.1 Passive Transport pp. 95-99