BELLWORK What are the three organelles that only plants have?

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Presentation transcript:

BELLWORK What are the three organelles that only plants have?

Cellular Transport Section 7.4

Cellular Transport Passive Transport Movement of particles across the cell membrane without using energy Three Modes of Passive Transport Diffusion Facilitated Diffusion Osmosis

Passive Transport Diffusion Movement of particles from an area of high concentration to an area of lower concentration

Passive Transport Diffusion is controlled by Pressure Temperature Concentration Dynamic Equilibrium Reached when diffusion of material into the cell equals diffusion of material out of the cell Molecules continue to move, but the overall concentration remains the same.

Passive Transport Diffusion in a Cell

Passive Transport Facilitated Diffusion Movement of materials across the plasma membrane using proteins

Passive Transport- Facilitated Diffusion Channel Proteins always open to allow certain substances to pass down their concentration gradient Carrier Proteins change shape as diffusion continues to help move the particle through the membrane

Passive transport Facilitated diffusion Channel Proteins Carrier proteins

Passive Transport Osmosis Diffusion of water across a selectively permeable membrane Three Types of Solutions Isotonic Hypotonic Hypertonic

Passive Transport Isotonic Solution Water and dissolved substances diffuse into and out of the cell at the same rate.

Passive Transport Hypotonic Solution Solute concentration is higher inside the cell. Water diffuses into the cell.

Passive Transport Hypertonic Solution Solute concentration is higher outside the cell. Water diffuses out of the cell.

Active Transport Using Carrier Proteins Cellular Structure and Function Cellular Transport Active Transport Movement of particles across the cell membrane using energy; going from low to high concentration Active Transport Using Carrier Proteins Against the concentration gradient

Active Transport Types of Active Transport Pumps Na+/K+ ATPase pump Moves three Na+ ions out of the cell and two K+ ions into the cell

Process by which the cell surrounds and takes particles into the cell Cellular Structure and Function Active Transport Endocytosis Process by which the cell surrounds and takes particles into the cell Exocytosis Secretion of material out of the plasma membrane

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