Chapter 3 Cell Form and Function

Chapter 3 Cell Form and Function - Chapter 3 Cell Form and...

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Chapter 3 Cell Form and Function Cell Parts Nucleus Cytoplasm- organelles and cytosol Cytosol- Plasma Membrane - - - - Intracellular Extracellular Plasma Membrane components Membrane Lipids Lipids constitute 3 lipids Phospholipid bilayer - - hydrophilic heads -hydrophobic tails motion of these molecules creates membrane fluidity, an important quality that allows for self repair Cholesterol - Glycolipids - Membrane Proteins
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Proteins constitute - - Integral Proteins - - - Peripheral Proteins - - Membrane protein functions - - - Receptors and Secondary messenger systems - Some cells communicate with chemical signals that cannot enter target cells membrane receptors bind these messengers (hormones, neurotransmitters) each receptor is usually specific for one messenger Channel Proteins Integral proteins that form pores (channels) for passage of water or solutes - Gated channels open and close in respond to stimuli - - Membrane Carriers or Pumps -Integral proteins that bind to solutes and transfer them across membrane - Cell Identity Markers - Overview of membrane transport Selectively permeable membrane
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This note was uploaded on 09/25/2011 for the course BSC 1085 taught by Professor Staff during the Fall '09 term at Broward College.

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Chapter 3 Cell Form and Function - Chapter 3 Cell Form and...

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