DESCRIBE IN FULL, THE CELL MEMBRANE AS A CELL ORGANELLE AND THE RELEVANCE OF CELL MEMBRANE TO SURVIVAL OF AN ORGANISM

 



SUBJECT: PHYSIOLOGY

TOPIC: CELL PHYSIOLOGY

WRITER: GOGO ANDREW MNGUTSWENGA ‘amblo


QUESTION 22


DESCRIBE IN FULL, THE CELL MEMBRANE AS A CELL ORGANELLE AND THE RELEVANCE OF CELL MEMBRANE TO SURVIVAL OF AN ORGANISM 



It is a biological limiting membrane that separates the intracellular fluid from extracellular fluid. It is also called plasmallema. It is 7um – 10um in diameter. It is arranged in trilaminar pattern.

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DESCRIBE IN FULL, THE CELL NUCLEUS AS A CELL ORGANELLE AND THE RELEVANCE OF CELL NUCLEUS TO SURVIVAL OF AN ORGANISM


 It has two hydrophilic phosphate group arranged externally and internally. In between the hydrophobic group is the hydrophobic fat group. It contains proteins, lipids and carbohydrates. The composition is approximately


  •  55% proteins, 
  • 13% cholesterol, 
  • 25% phospholipids, 
  • 4% other lipids 
  • 3% carbohydrates


RELEVANCE OF CELL MEMBRANE TO ORGANISM SURVIVAL

It serves as a protective structure by regulating the movement of substances in and out of the cell.

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