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Plasma Membrane,
tahu tak kengkawan, kat mana letaknya si PM ni?
PM ni terletaknya dekat cell membrane iaitu bahagian yg paling luar sekali dekat animal cell =D
Dekat plant cell pun ada
Anda sudah sedia tahu kan...
Sekarang jom kita lihat kat bahagian Plasma Membrane pulak, kenali bahagian bahagian yg ada kat situ
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| Source : WikiBooks (Editted) |
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| Source : Photobucket |
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| STRUCTURE OF PM Source : Panitia Bio SMK ST Mark |
- To maintain the concentration of ions inside the cell and outside the cell (PM allow the substance to enter and leave)
- The digested food and the nutrients are absorbed through the Plasma Membrane
- Regulate the movement of substances in and out of the cell
- Help the cells to maintain the constant internal environment (homeostasis)
Phospholipid bilayer :
- Hydrophilic head - ( position ; towards to water )
- Hydrophobic tail - ( position ; afraid of water [myconceptonly] )
- Arrange in two layers, thats why it called "bilayer", "bi" means "2"
- Acts as barrier(halangan) - isolate(m'asingkan) the 2 sides of membrane =D
- Phospholipid bilayer also contain cholestrol, pore protein, carrier protein and glycoprotein. You can see these structeres on the picture above
