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Active Transport

Active Transport. B4d. Odd One Out. Iron. Potassium. Phosphorus. Magnesium. Nitrogen. Task. Analyse the data on mineral content in natural and artificial fertilisers. Complete worksheet B4d1 (Grade D/E) 5-10 minutes. What are the key minerals needed by plants? Why do they need them?.

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Active Transport

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  1. Active Transport B4d

  2. Odd One Out Iron Potassium Phosphorus Magnesium Nitrogen

  3. Task • Analyse the data on mineral content in natural and artificial fertilisers. • Complete worksheet B4d1 (Grade D/E) • 5-10 minutes. • What are the key minerals needed by plants? • Why do they need them?

  4. OBJECTIVES Key Objective • Describe the importance of mineral uptake for healthy growth in plants and how it is down • Describe the role of minerals in healthy plant growth (D) • Describe the signs of mineral deficiency in plants (C) • Describe the function of active transport (B) • Explain why active transport is necessary (A) • Explain why active transport needs energy (A*)

  5. Minerals in Plants

  6. Task • Split a double page spread in your book into 4 sections with the following headings in each: • The minerals needed by plants (D) • Signs of deficiency (C) • What the plant uses them for (B) • Fill each section – 15 minutes. • Leave the 4th section for now – you will fill that in later. • How does the plant get these minerals? Where from?

  7. Active transport • To movement of substances against a concentration gradient and/or across a cell membrane • The process uses energy

  8. Rate of active transport depends on the rate of respiration Rate of active transport 0 Rate of respiration

  9. Why? Important in both plants & animals • PLANTS • Allows the absorption of dilute minerals into the plant against a concentration gradient • ANIMALS • Allows the absorption of glucose (essential for respiration within nervous tissue) into the blood from the kidneys and ileumagainst a concentration gradient

  10. ............... and ............... depend on a ............... gradient in the right direction to work. Substances are moved .............. a gradient by ............... ............... which uses ............... produced by ............... Osmosis Active Energy Respiration Diffusion Concentration Against Transport

  11. Questions • 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 problem • The 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? • Explain why cyanide is such an effective poison

  12. DIFFUSION OSMOSIS ACTIVE TRANSPORT

  13. DIFFUSION OSMOSIS Involves water only How oxygen leaves a leaf Is passive High to low concentration How water keeps plant cells turgid Movement of particles What was your score…? Occurs in nature Involves transport of solutes Needs a semi-permeable membrane Requires energy How minerals get into root hair cells Against a concentration gradient ACTIVE TRANSPORT

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