Engage – what do these molecules have in common?

Slides:

Advertisements

Similar presentations

DIFFUSION & OSMOSIS.

Advertisements

Cells and Their Environment

MOVEMENT INTO AND OUT OF CELLS

How is material transported into and out of the cell?

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.

The Selectively permeable Cell Membrane Diffusion, osmosis, and active transport.

Cell Transport The movement of molecules can be either passive (no energy) or active (needs energy) depending upon the membrane structure and concentration.

Active transport p.216.

 Transport can be passive or active.  Passive requires no energy and moves down a concentration gradient from high to low concentration  Active requires.

Topic: Cells Aim: How does the cell mebrane work?

What can you smell? I´m going to spray some perfume in the corner of the room As soon as you can smell it stand up Now you have 2 min explain what just.

Let’s look at one example involving osmosis. Osmosis is the diffusion of water across a semi permeable membrane such as a cell membrane. A semi permeable.

IT’S A GREEN WORLD WATER, WATER EVERYWHERE. Starter Raise your hand when you can smell the perfume………………… Why is perfume put on the warm places of the.

The Cell Environment Jennifer Naples DI Biology. Cell Membrane Works as the gatekeeper of the cell It is selectively permeable – it lets some substances.

How do plants taken in water from the Soil?. Root Hair Cells Roots do more than just anchor the plant in the ground, they take up water and mineral salts.

Transport across Plasma membranes. Membranes Are differentially permeable – Permeable to SOME substances. The membrane selects what substances pass through.

Diffusion is the process by which particles of gases or liquids spread out from an area where there are lots of them to areas where there are fewer of.

Concentration gradient

Diffusion, Osmosis and Active Transport

Diffusion & Osmosis.

How were you able to smell the perfume?

Cardiac volume = stroke rate x heart rate

Transport in and out of cells

Cells Starter quiz You will see each question for 15 seconds and then must vote for the correct answer! Click to continue.

Topic Osmosis Level GCSE (or any course for students aged 11-16)

Unit 4 Review Questions.

Getting In and Out of Cells

Cell Transport Practice quiz.

Cell Membrane (Transport) Notes

Bell ringer: How do things get in an out of a cell?

Section Objectives 1. Explain how the processes of diffusion, passive transport, and active transport occur. 2. The differences between active and passive.

Active and Passive Transport

Passive Vs. Active Transport in Cells

It is dangerous, potentially fatal, to drink too much water

Transport Across Membranes

Transport Across Membranes

Place these features in the correct part of the Venn Diagram

Movement across the Plasma Membrane

Diffusion & Osmosis.

What situations would diffusion not work to transport materials into or out of the cell? Low to high concentration diffusion would not work.

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

Active Transport Roots can absorb other minerals ions dissolved in soil even if their concentration is higher in the plant than in the soil water. Absorbing.

Section Objectives Predict the movement of water and other molecules across selectively permeable membranes. (SPI ) Compare and contrast.

Exchange with the Environment

Homeostasis and CellTransport

The Cell in its Environment

BIOLOGY Unit 2 Notes: Cell Membrane Transport

Types of Transport Review

Place these features in the correct part of the Venn Diagram

Movement of particles across the cell membrane without using energy

Movement In and Out of Cells

Substances enter and leave cells through the cell membrane

Place these features in the correct part of the Venn Diagram

Osmosis Learning Objective

Week 3 Vocab Definitions

HOW DO MATERIALS MOVE IN AND OUT OF CELLS?

Movement of particles across the cell membrane without using energy

Transport through cell membranes

CELL MOVEMENT DIFFUSION AND OSMOSIS.

Biology 4.1. Cell structure

Chapter 7 Cellular Structure and Function

Diffusion & Osmosis.

Cell Processes.

Diffusion and Osmosis.

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

Homeostasis and Transport

Passive and Active Transport

Selectively permeable membranes

Presentation transcript:

Engage – what do these molecules have in common? They are substance/molecules that need to be transported into or out of cells.

Learning Objectives

Draw a line under last lesson’s work and write today’s title in your book... 18/09/2018 c/w Cell Transport Must be able to… describe the terms diffusion, osmosis and active transport Should be able to… give examples of how each transport mechanism is used in plants and animals Could be able to… explain the key differences between osmosis, diffusion and active transport.

Explain Diffusion

Active Transport Requires energy from respiration Against concentration gradient Low to high concentration

Osmosis Movement of water molecules from a high concentration to a low concentration through a partially permeable membrane.

Animation of diffusion & osmosis

Animation of diffusion, osmosis and active transport

Checking understanding Evaluate Checking understanding Describe how perfume smell spreads Explain why a slice of potato will decrease in mass if it is placed in a concentrated sugar solution Muscle cells in the leg use up oxygen but are surrounded by a fluid containing a lot of oxygen. Explain why oxygen moves into cells. Explain why water moves into a plant. An 8g piece of potato is left in water for an hour. Its mass becomes 8.5g. Calculate the percentage change in mass.

Purple pen time! Describe how perfume smell spreads The particles move from a high concentration from where the perfume was sprayed to a low concentration. This is called diffusion. 2. Explain why a slice of potato will decrease in mass if it is placed in a concentrated sugar solution. This is because water will move from inside the potato where there is a high concentration to outside the potato where there is a low concentration through a partially permeable membrane. This is called osmosis.

Purple pen time! 3. Muscle cells in the leg use up oxygen but are surrounded by a fluid containing a lot of oxygen. Explain why oxygen moves into cells. Oxygen is found in a high concentration in the fluid and in the blood vessels surrounding the cells. It will therefore move from a high concentration to a low concntration. 4. Explain why water moves into a plant. This is because water is found in a high concentration in the soil and it then moves from a high concentration to a low concentration through the root hair cells.

Purple pen time! An 8g piece of potato is left in water for an hour. Its mass becomes 8.5g. Calculate the percentage change in mass. 8.5 – 8.0 = 0.5 = 0.5 / 8.0 x 100 = 6.25%