Movement of particles across the cell membrane without using energy

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Presentation transcript:

Movement of particles across the cell membrane without using energy Chapter 7 Cellular Structure and Function 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

Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Diffusion Movement of particles from an area of high concentration to an area of lower concentration Initial Conditions Diffusion Low High High Low

Diffusion is controlled by Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Diffusion is controlled by Temperature Pressure Concentration

Facilitated Diffusion Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Facilitated Diffusion Movement of materials across the plasma membrane using proteins

Channel Proteins Carrier Proteins 7.4 Cellular Transport Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Channel Proteins Carrier Proteins

Diffusion of water across a selectively permeable membrane Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Osmosis Diffusion of water across a selectively permeable membrane Three Types of Solutions Isotonic Hypotonic Hypertonic

Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Isotonic Solution Water and dissolved substances diffuse into and out of the cell at the same rate. Plant Cell Blood Cell 11,397x

Solute concentration is higher inside the cell. Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Hypotonic Solution Solute concentration is higher inside the cell. Water diffuses into the cell. Plant Cell Blood Cell 13,000x

Solute concentration is higher outside the cell. Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Hypertonic Solution Solute concentration is higher outside the cell. Water diffuses out of the cell. Plant Cell Blood Cell 13,000x

Active Transport Using Carrier Proteins Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Active Transport Movement of particles across the cell membrane using energy Active Transport Using Carrier Proteins

Process by which the cell surrounds and takes particles into the cell Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Endocytosis Process by which the cell surrounds and takes particles into the cell Exocytosis Secretion of material out of the plasma membrane