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TRANSPORT SYSTEMS

TRANSPORT SYSTEMS. PASSIVE AND ACTIVE TRANSPORT. TYPES OF PASSIVE TRANSPORT Diffusion (movt. of materials) Facilitated diffusion (use of transport protein) Osmosis (water) Filtration (i.e. liver and kidneys) ALL MOVE FROM REGION OF HIGH CONCENTRATION TO LOW…AND ALL DON’T REQUIRE ENERGY!!.

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TRANSPORT SYSTEMS

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  1. TRANSPORT SYSTEMS

  2. PASSIVE AND ACTIVE TRANSPORT • TYPES OF PASSIVE TRANSPORT • Diffusion (movt. of materials) • Facilitated diffusion (use of transport protein) • Osmosis (water) • Filtration (i.e. liver and kidneys) • ALL MOVE FROM REGION OF HIGH CONCENTRATION TO LOW…AND ALL DON’T REQUIRE ENERGY!!

  3. REMEMBER DIFFUSION?

  4. FACILITATED DIFFUSION

  5. OSMOSIS

  6. FILTRATION

  7. Diffusion in the Human Body Main transport of nutrients in the human body is through the blood system Nutrients pass from blood vessels to body cells due to a concentration gradient that forms (b/c of lower concentration of nutrients in the cell, nutrients diffuse from blood vessels to cell).

  8. DIFFUSION – DID YOU KNOW • Our eyes need oxygen, yet there are very few blood vessels (carriers of oxygen) around the eye… • As a result, blood diffuses from the air directly into the eye through the cornea • In places with dirty atmosphere (smoke, dust), your eyes dry out because of lack of oxygen

  9. HOW MEDICINES REACH OUR CELLS • For pills taken orally… • We swallow the pill • The medicine diffuses out of the capsule and into the stomach • The medicine is absorbed into lining of stomach and then bloodstream • Patch • Medicine diffuses into skin then into bloodstream

  10. ACTIVE TRANSPORT 1)REQUIRES ENERGY (ATP) 2) MOVEMENT FROM LOW CONCENTRATION TO HIGH (AGAINST GRADIENT) • Did you know…when you sleep you use between 30 and 40% of your total energy budget for active transport • Helps kidneys reabsorb materials, muscle contract, and nerves to carry impulses

  11. How It Works • Concentration of Na ions outside nerve cell is much greater than concentration of K ions inside cell…Why?

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