Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Cambridge igcse biology ( 2016 2018) movement in and out of cells cell

1,317 views

Published on

this presentation depending on Cambridge syllabus of 2016-2018 biology 610

Published in: Education
  • Be the first to comment

  • Be the first to like this

Cambridge igcse biology ( 2016 2018) movement in and out of cells cell

  1. 1. Cambridge IGCSE Biology 3- movement in and out of cells Biology Cambridge IGCSE Biology
  2. 2. 3.1 diffusion Diffusion is the net movement of particles from a region of their higher concentration to a region of their lower concentration down a concentration gradient, as a result of their random movement Extended energy for diffusion comes from the kinetic energy of random movement of molecules and ions
  3. 3. 3.1 diffusion Diffusion importance living organisms obtain most of their requirements and riding wastes by diffusion 1- photosynthesis get CO2 by diffusion 2- photo synthesis ride producing O2 as waste by diffusion 3- diffusion is important in gas exchange in respiration 4- absorb digested food by diffusion 5- insect pollinated flower attract insect by diffusion
  4. 4. 3.1 diffusion Extended Investigate the factors that influence diffusion, limited to 1-surface area, 2-temperature, 3-concentration gradients 4-distance
  5. 5. State that water diffuses through ( semi permeable membranes) by osmosis 3.2 Osmosis Investigate and describe the effects on plant tissues of immersing them in solutions of different concentrations
  6. 6. Osmosis and plant cells
  7. 7. State that plants are supported by the pressure of water inside the cells pressing outwards on the cell wall 3.2 Osmosis
  8. 8. osmosis is the net movement of water molecules from a region of higher water potential (dilute solution) to a region of Lower water potential (concentrated solution), through a semi permeable membrane 3.2 osmosis Extended
  9. 9. In hypotonic solution Osmosis take place . Water diffuse into cytoplasm through the semi permeable membrane Cell become TURGID and TURGOR PRESSURE become high so the cell will be supported Extended 3.2 osmosis Plant cell will not bursts ( be destroyed ) Because the cell wall can protect it water pressure acting against an inelastic cell wall
  10. 10. In hypertonic solution Osmosis take place . Water diffuse out of cytoplasm through the semi permeable membrane First cell SHRINKS slightly till become FLUCCIDE Then the cell membrane pulls away from the cell wall The cell is PLASMOLYSED Extended 3.2 osmosis
  11. 11. 3.2 Osmosis importance of water potential and osmosis in the uptake of water by plants Root hair take in water by osmosis which depends on the water potential in the soil So increasing amount of water in the soil leads to high water potential helps water to move into the root hair and vice versa
  12. 12. 3.2 Osmosis and animal cells Animal cell in hypotonic solution Cytoplasm is more concentrated than solution so by osmosis water diffuse into the cell As more and more water inter the cell then the cell membrane start to stretch Eventually the strain is too much and the cell bursts ( destroyed )
  13. 13. Osmosis and animal cells
  14. 14. 3.2 Osmosis and animal cells Animal cell in hypertonic solution Cytoplasm is less concentrated than solution so by osmosis water diffuse out of the cell As more and more water exit the cell then the cytoplasm shrinks and cell shrivels up
  15. 15. 3.3 Active transport active transport is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration
  16. 16. What is active transport?
  17. 17. 3.3 Active transport Extended Examples of active transport 1- Root hair cell Take in nitrates ions from soil while root hair cell has high concentration of nitrates comparing with those in the soil by ACTIVE TRANSPORT Root hair cell has special transport protein which pick up nitrate ions from outside the cell Then change the shape to push nitrate into the cytoplasm by using energy from respiration
  18. 18. How does the kidney work?
  19. 19. 3.3 Active transport Extended Examples of active transport 2- small intestine Take in glucose from the lumen of intestine into cells of villi 3- Kidney tubules

×