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 (D)</p> Signup and view all the answers

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

<p>Every 6-8 weeks (C)</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 (A)</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 (D)</p> Signup and view all the answers

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

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

What is the consequence of a decline in olfactory ability?

<p>Changes in taste perception (C)</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 (B)</p> Signup and view all the answers

What are taste cells responsible for?

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

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

<p>Sweet (C)</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 (C)</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 (B)</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 (D)</p> Signup and view all the answers

What is the purpose of the basal axons of ORNs?

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

What is the role of glomeruli within the olfactory bulb?

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

Which type of receptors do ORNs have?

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

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

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

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

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

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

<p>gustducin (C)</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 (A)</p> Signup and view all the answers

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

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

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

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

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

<p>Amygdala (C)</p> Signup and view all the answers

What do taste buds relay information through?

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

Where are projections sent from the NTS in the brainstem?

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

Where are the positive properties of food reinforced?

<p>Ventral tegmental area (C)</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 (B)</p> Signup and view all the answers

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