3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Slides:

Advertisements

Similar presentations

Homeostasis refers to the necessity of an organism to maintain constant or stable conditions. In order to maintain homeostasis, all organisms have processes.

Advertisements

Structure and Function

Movement IN and OUT of Cells Substances move in and out through the cell membrane Moving from high to low concentration DOES NOT REQUIRE ENERGY by the.

Osmosis and Diffusion Semi-Permeable membrane – allows some things through and keeps other things out (Also called selectively permeable)

Movement of particles across the cell membrane without using energy

Transporting substances By Sangarun sangchachat Diffusion Diffusion is the movement of particles from an area of high concentration to an area of low.

Cell Transport Osmosis and Diffusion.  Particles in constant motion  Run into each other and randomly spread out  Particles move from an area of high.

Facilitated Diffusion Active Transport

PASSIVE TRANSPORT Movement of molecules across a membrane that requires no energy and always occurs down a concentration gradient Types of passive transport.

Types of Transport Review. The movement of particles against the direction of diffusion requiring cell energy. ACTIVE TRANSPORT.

I can describe passive transport.

Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.

Movement of Materials Through The Cell Membrane For a cell to maintain its internal environment, (i.e., achieve homeostasis) it has to be selective in.

Cells, Cells, Cells Active Transport and Passive Transport.

Transport. Concentration Gradient If there is a concentration gradient, movement will occur After concentrations are equal= dynamic equilibrium – Dynamic.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Diffusion and Osmosis. KEY CONCEPT Materials move across membranes because of concentration differences.

Materials move across membranes because of concentration differences.

KEY CONCEPT Materials move across membranes because of concentration differences. 3.4 Diffusion and Osmosis.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

6.3 Transport. What do you predict will happen if food coloring is dropped into a beaker of water? Where are the molecules most concentrated to start?

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Passive Transport Does not require The diffusion of __________

Processes for maintaining homeostasis Osmosis, diffusion, active transport, passive transport Warm-up Questions: What is homeostasis? Which organelle is.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Notes: Cellular Transport

Cell membranes are composed of two phospholipid layers.

Section 4 Cellular Transport

CELLS AND THEIR ENVIRONMENTS

Diffusion and Osmosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Movement across the Plasma Membrane

Cellular Transport Biology 2017.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

CELLS AND THEIR ENVIRONMENTS

Chapter 3.4 Diffusion and Osmosis

The student is expected to: 4B investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis.

Diffusion and Osmosis.

BIOLOGY Unit 2 Notes: Cell Membrane Transport

Movement of particles across the cell membrane without using energy

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

TYPES OF TRANSPORT.

The student is expected to: 4B investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis.

Cell membranes are composed of two phospholipid layers.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis 1. Cells are the basic unit of life.

Cellular Transport 7.4.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Cell Membranes Osmosis and Diffusion

Week 3 Vocab Definitions

S2E5: Osmosis Do This: Have Reading Qs 3.3 ready to grade

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Cell Processes 7th 15.2 Cell Transport.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

2 types of passive transport

3.4 Diffusion and Osmosis KEY CONCEPT ________ ____ across _________ because of ____________ ___________.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Cell Transport Unit 4.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Chapter 3, Part 2 Notes 3.4 Diffusion and Osmosis

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

Presentation transcript:

3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.

3.4 Diffusion and Osmosis Passive transport does not require energy input from a cell. Molecules can move across the cell membrane through passive transport. There are two types of passive transport. diffusion osmosis

3.4 Diffusion and Osmosis Diffusion and osmosis are types of passive transport. Molecules diffuse down a concentration gradient.

3.4 Diffusion and Osmosis Diffusion and osmosis are types of passive transport. Osmosis is the diffusion of water molecules across a semipermeable membrane.

3.4 Diffusion and Osmosis Diffusion and osmosis are types of passive transport. There are three types of solutions. isotonic hypertonic hypotonic

3.4 Diffusion and Osmosis Some molecules can only diffuse through transport proteins. Some molecules cannot easily diffuse across the cell membrane. Facilitated diffusion is diffusion through transport proteins.

Factors that affect rate of diffusion? Take some time to think about various factors that could affect the rate of diffusion. Temperature Particle Size pH Solute concentration