Chapter 7 Cellular Structure and Function

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Presentation transcript:

Chapter 7 Cellular Structure and Function Section 1: Cell Discovery and Theory Section 2: The Plasma Membrane Section 3: Structures and Organelles Section 4: Cellular Transport

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 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.

Diffusion in a Cell 7.4 Cellular Transport Chapter 7 Cellular Structure and Function 7.4 Cellular Transport Diffusion in a Cell

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

Chapter 7 Cellular Structure and Function

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

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

Types of Active Transport Pumps Chapter 7 Cellular Structure and Function 7.4 Cellular 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 Sodium-Potassium Pump

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

Which type of cellular transport does not require an input of energy? Chapter 7 Cellular Structure and Function 7.4 Formative Questions Which type of cellular transport does not require an input of energy? active transport endocytosis exocytosis facilitated diffusion

How does osmosis occur between the Chapter 7 Cellular Structure and Function 7.4 Formative Questions How does osmosis occur between the two solutions separated by the selectively permeable membrane?

Sugar moves to the right. Water moves to the left. Chapter 7 Cellular Structure and Function 7.4 Formative Questions Sugar moves to the left. Sugar moves to the right. Water moves to the left. Water moves to the right.

Which diagram shows a cell in a hypotonic solution? Chapter 7 Cellular Structure and Function 7.4 Formative Questions Which diagram shows a cell in a hypotonic solution?

_______ is the net movement of particles from Chapter 7 Cellular Structure and Function Chapter Assessment Questions _______ is the net movement of particles from an area where there are many particles of the substance to an area where there are fewer particles of the substance. Diffusion Endocytosis Exocytosis Equilibrium

Why are the carrier proteins that move Chapter 7 Cellular Structure and Function Standardized Test Practice Why are the carrier proteins that move substances across a plasma membrane from a region of lower concentration to a region of higher concentration called pumps?

They require energy to move substances Chapter 7 Cellular Structure and Function Standardized Test Practice They require energy to move substances against a concentration gradient. They open and close to allow substances to diffuse across the plasma membrane. They help with the osmosis of water through the plasma membrane. They pump water into the cell, causing the pressure within the cell to increase.

Section 4 Vocabulary diffusion dynamic equilibrium Chapter 7 Cellular Structure and Function Vocabulary Section 4 diffusion dynamic equilibrium facilitated diffusion osmosis isotonic solution hypotonic solution hypertonic solution active transport endocytosis exocytosis