The Impact of Olfactory Decline
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Questions and Answers

Which part of the olfactory system is responsible for binding specific odorant molecules?

  • Olfactory cilia
  • Olfactory bulb
  • Olfactory receptor neurons (correct)
  • Olfactory nerves
  • What is the main function of olfactory cilia in olfaction?

  • Transmit olfactory information to the olfactory bulb
  • Bind specific odorant molecules
  • Generate new olfactory receptor neurons
  • Elicit changes in membrane current (correct)
  • What is the role of olfactory nerves in the olfactory system?

  • Generate new olfactory receptor neurons
  • Elicit changes in membrane current
  • Transmit olfactory information to the olfactory cortex (correct)
  • Bind specific odorant molecules
  • Which cells within the olfactory epithelium continuously divide to generate new olfactory receptor neurons?

    <p>Precursor stem cells</p> Signup and view all the answers

    How often are olfactory receptor neurons turned-over (renewed)?

    <p>Every 6-8 weeks</p> Signup and view all the answers

    What is the structure responsible for transmitting olfactory information from the olfactory bulb to the olfactory cortex?

    <p>Olfactory tract</p> Signup and view all the answers

    What is the main function of olfactory receptor neurons in the olfactory system?

    <p>Bind specific odorant molecules</p> Signup and view all the answers

    Which sense is significantly diminished in individuals with Alzheimer's disease?

    <p>Olfactory sense</p> Signup and view all the answers

    What is the consequence of a decline in olfactory ability?

    <p>Changes in taste perception</p> Signup and view all the answers

    Which system converts the chemical and physical properties of food into electrical signals?

    <p>The gustatory (taste) system</p> Signup and view all the answers

    What are taste cells responsible for?

    <p>Stimulus identity and quantity of a tastant</p> Signup and view all the answers

    Which taste sensation is mediated by the binding of sweet foods to the T1R2 protein?

    <p>Sweet</p> Signup and view all the answers

    What allows for the exocytosis of neurotransmitter onto afferent sensory neurons in taste cells?

    <p>Opening of voltage-gated sodium, calcium, and potassium channels</p> Signup and view all the answers

    What role does pheromone signaling play in animal species?

    <p>Establishing and maintaining appropriate social, reproductive, and parenting behaviors</p> Signup and view all the answers

    Which structures within the nasal epithelium secrete mucous to keep the epithelium moist and allow odorants to solubilize onto receptors?

    <p>Bowman's gland</p> Signup and view all the answers

    What is the purpose of the basal axons of ORNs?

    <p>To project to the olfactory bulb</p> Signup and view all the answers

    What is the role of glomeruli within the olfactory bulb?

    <p>To receive excitatory projections from ORNs</p> Signup and view all the answers

    Which type of receptors do ORNs have?

    <p>G-protein coupled receptors (GPCR)</p> Signup and view all the answers

    What is the role of adenylate cyclase in olfactory signal transduction?

    <p>To generate cyclic AMP (cAMP)</p> Signup and view all the answers

    Which olfactory targets do olfactory information from the initial olfactory bulb targets get distributed to?

    <p>Thalamus, hypothalamus, and frontal cortex</p> Signup and view all the answers

    What can a reduction in olfactory sensitivity be a result of?

    <p>All of the above</p> Signup and view all the answers

    Which protein is responsible for cleaving PLC into IP3 to activate TRPM5 calcium selective channels?

    <p>gustducin</p> Signup and view all the answers

    Where does tastant information get relayed to for higher order processing and associative learning?

    <p>Insular and frontal cortex</p> Signup and view all the answers

    Which cranial nerves synapse onto the solitary nucleus of the brainstem?

    <p>Taste buds</p> Signup and view all the answers

    What is the role of the hypothalamus in the taste system?

    <p>Regulate visceral motor function</p> Signup and view all the answers

    Which part of the brain regulates the emotional response to tastants?

    <p>Amygdala</p> Signup and view all the answers

    What do taste buds relay information through?

    <p>Cranial nerves</p> Signup and view all the answers

    Where are projections sent from the NTS in the brainstem?

    <p>Insular and frontal cortex</p> Signup and view all the answers

    Where are the positive properties of food reinforced?

    <p>Ventral tegmental area</p> Signup and view all the answers

    What is the role of the ventral tegmental area in the taste system?

    <p>Relay tastant information to central motivation and reward centers</p> Signup and view all the answers

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