2Produce their own definition and amend it to B3 – grade A standard. TITLE: Active TransportObjectivesWhat is active transport – grade CDescribe the process and know where active transport occurs in plants and animals? Grade BExplain the benefits to the organism of using active transport. Grade AKEY WORDS:Active transportDiffusionConcentration gradientOutcomes:Pupils will:Produce their own definition and amend it to B3 – grade A standard.Produce a table with plant and animal examples of active transport.answer exam style questions
3Starter Complete the following: Diffusion is the movement of particles ………… a ………….. gradient from an area of ……………….. concentration to an area of …………………………..
4What is a Concentration Gradient? Hills and graphs have gradients1) Which one has the steepest gradient?2) Which one moves up a gradient and which moves down a gradient?
5moving down a concentration gradient Which way will the particles move?
6What does the phrase active transport mean? Look for clues in the words above.Write a definitionCan you think of any places in plants and animals where this may occur? Produce a table and add/change details as the lesson continues
7Now watch this clip Diffusion and Active Transport - My GCSE Science What did you learn? Add details to your notes.Do you want to change your definition? Amend as necessary.
8moving UP or against a concentration gradient ENERGYThe particles can move up the concentration gradient if energy is usedThis is active transport
10Active transport This DOES Require energy Particles move against a concentration gradient.The energy is needed to make “pumps” move particles the wrong way.E.g. glucose from the intestine into the blood
13Active TransportActive transport occurs across semi permeable membranes and moves particles from a low concentration to a higher concentration. This is against the concentration gradient.Transport or carrier proteins are needed to get these molecules into the cells and these use energy.Cells that do active transport contain large numbers of mitochondria.
14Why? Important in both plants & animals Allows the absorption of dilute minerals into the plant against a concentration gradientANIMALSAllows the absorption of glucose (essential for respiration within nervous tissue) into the blood from the kidneys and ileum against a concentration gradient
15Rate of active transport depends on the rate of respiration Draw a quick sketch. Describe what this graph shows you.Rate of active transportRate of respiration
16Active TransportInside of cell Outside of cellATPADPP
17Lumen of small Intestine Na+ high concentrationGlucoseLumen of small IntestineCo TransportNa+ low concentrationGlucoseEpithelial CellK+Active TransportFacilitated DiffusionBlood CapillaryGlucoseK+
18Why? Important in both plants & animals SEA LIFEHigh concentration of salt in sea waterTo absorb salt: SALT GLANDSLocated near the eyesRemove salt from water against concentration gradientExcrete a salt solution 6x stronger than urine
19What affect does cyanide have on the body? Challenge. Statement. Cyanide stops active transportCyanide affects mitochondria. What will happen?Mitochondria are involved in respiration, so no respiration.This means the organism dies.
20Questions Explain how active transport works in a cell Give some examples of a situations when a substance cannot be moved into a cell by osmosis or diffusion, and how active transport solves the problemThe processes of diffusion and osmosis do not need energy to take place. Why does an organism have to provide energy for active transport and where does it come from?
21PlenaryMake a list of similarities and differences between active transport and diffusion
22Reflect and assess your learning What grade are you working at for this topic?