CELL MEMBRANE

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CELL MEMBRANE

STRUCTURE:

  • 2 LAYRES OF PHOSPHOLIPIDS
  • RECEPTERS ON THE OUTER LAYER

FUNCTION:

  • SELECTIVELY PERMEABLE MEMBRANE
  • ORGANELLESIN SIDE THE CELL ALSO HAVE A MEMBRANE

(http://bealbio.wikispaces.com/file/view/cell_membrane.jpg/364463776/1046x532/cell_membrane.jpg)

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NUCLEUS

(http://2.bp.blogspot.com/-ksgcIMwTyj0/UVcLATy0cOI/AAAAAAAAAUE/VPmfPvEKZpI/s1600/nucleus.png)

STRUCTURE:

  • ROUND IN SHAPE
  • DOUBLE MEMBRANE (NUCLEAR ENVELOPE)
  • NUCLEAR PORES
  • DNA
  • NUCLEOLUS

FUNCTION:

  • CONTAINS DNA
  • CONTROLS ACTIVITIES INSIDE THE CELL
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MITROCHONDRION

(http://www.s-cool.co.uk/assets/learn_its/alevel/biology/cells-and-organelles/organelles/mitochondria-b.gif)

STRUCTURE:

  • OVAL SHAPED
  • DOUBLE MEMBRANE
  • INNER MEMBRANE IS CALLED 'CRISTAE'
  • CRISTAE HAS A LARGE SURFACE AREA
  • MATRIX CONTAINS ENZYMES

FUNCTION:

  • 'POWER HOUSE' OF THE CELL
  • WHERE AEROBIC RESPIRATION REACTIONS TAKE PLACE
  • PRODUCES ENERGY IN THE FORM OF ATP
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ENDOPLASMIC RETICULUM

STRUCTURE:

  • NETWORK OF MEMBRANES
  • 2 TYPES OF ER
  • ROUGH ER IS COVERED IN RIBOSOMES

FUNCTION:

  • ROUGH ER - TRANSPORTS SYNTHESISED PROTEINS
  • SMOOTH ER - PRODUCES AND TRANSPORTS LIPIDS
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LYSOSOME

(http://www.biology4kids.com/files/art/cell_lysosome1.png)

STRUCTURE:

  • SAC SHAPED
  • SINGLE MEMBRANE
  • CONTAINS DIGESTIVE ENZYMES
  • CONTENTS ARE ACIDIC
  • ENZYMES HAVE A LOW OPTIMUM P.H. LEVEL

FUNCTION:

  • BREAKS DOWN UNWANTED MOLECULES AND CELLS
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GOLGI APPARATUS

(http://mrmitchellsbiology.weebly.com/uploads/1/0/4/2/10422385/573096.jpg?311)

STRUCTURE:

  • STACK SHAPED
  • FLATTENED MEMBRANE
  • SMALLER VESICLES AROUND IT

FUNCTION:

  • TRANSPORTS AND CHEMICALLY CHANGES THE SUBSTANCES IN IT
  • PRODUCES LYSOSOMES
  • SECRETIVE CELLS I.E. PANCREATIC CELLS CONTAIN A LARGE AMOUNT OF GOLGI APP
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RIBOSOMES

(http://www2.estrellamountain.edu/faculty/farabee/BIOBK/ribosome.gif)

STRUCTURE:

  • CONTAINS A LARGE AND A SMALL SUB UNIT
  • MADE OF PROTEIN AND RNA
  • CAN BE FREE FLOATING...
  • OR ATTATCHED TO ENDOPLASMIC RETICULUM

FUNCTION:

  • SITE OF PROTEIN SYNTHESIS
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