ANATOMY
Unit 2 NOTES:
Taste, Touch,
Smell
(1) Smell
• Smell is the binding of organic molecules to
receptors deep within the nose.
• Your nose is lined with olfacto...
(2) Taste
• Taste is the binding of molecules to
receptors on tongue.
• Tongue is covered in papillae projections,
covered...
(3) Taste Regions on Tongue
• Sweet:
– Receptors bind with monosaccharides and amino acids
– Location: Front & Center of T...
(4) Touch
• Touch = Pressure against skin
• Skin contains pressure + temperature receptors…
– Meissner’s Receptors = Super...
Anatomy unit 2 nervous system taste touch smell notes
Anatomy unit 2 nervous system taste touch smell notes
Anatomy unit 2 nervous system taste touch smell notes
Anatomy unit 2 nervous system taste touch smell notes
Anatomy unit 2 nervous system taste touch smell notes
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Anatomy unit 2 nervous system taste touch smell notes

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Anatomy unit 2 nervous system taste touch smell notes

  1. 1. ANATOMY Unit 2 NOTES: Taste, Touch, Smell
  2. 2. (1) Smell • Smell is the binding of organic molecules to receptors deep within the nose. • Your nose is lined with olfactory receptors… – Air flows in carrying organic molecules – Organic molecules dissolve in mucus lining – Organic molecules bind to receptors – Impulse sent through Olfactory Nerve
  3. 3. (2) Taste • Taste is the binding of molecules to receptors on tongue. • Tongue is covered in papillae projections, covered in “taste buds” or gustatory cells: – Organic Molecules dissolve in saliva – Molecules bind to gustatory cells – Impulse sent to brain
  4. 4. (3) Taste Regions on Tongue • Sweet: – Receptors bind with monosaccharides and amino acids – Location: Front & Center of Tongue • Sour: – Receptors bind with hydrogen ions (acid) – Location: Sides of Tongue • Salty: – Receptors bind with metal ions – Location: Front & Sides of Tongue • Bitter: – Receptors bind with alkaloids (typically nitrogenous) – Location: Very Back of Tongue
  5. 5. (4) Touch • Touch = Pressure against skin • Skin contains pressure + temperature receptors… – Meissner’s Receptors = Super Sensitive • Palms, Feet, Lips, Eyelids • Minimal pressure needed – Paccinian Receptors = Deep Receptors • Pressure + Vibration – Nociceptor Receptors= Sense Pain • Most Abundant on body – Thermoreceptors = Sense Temperature • Individual neurons for hot and for cold • Increase nerve impulses with changes in temperature
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