BIO3303 – Sensory Physiology Lecture Quiz
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Questions and Answers

What is the study of sensory physiology primarily concerned with?

  • Processing sensory information in the brain
  • Detecting incoming sensory signals
  • Classifying different types of sensory receptors
  • Transducing sensory stimuli (correct)

Which component is NOT part of the sensory system organization?

  • Effector neurons (correct)
  • Receptor proteins
  • Area of brain to which sensory neurons project
  • Accessory non-neural tissues

What is the main function of receptor proteins in sensory receptors?

  • Classifying different types of sensory stimuli
  • Transducing sensory stimuli
  • Processing sensory information
  • Specializing in detecting incoming sensory signals (correct)

What type of receptors fire action potentials only when the stimulus begins and adapt quickly?

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

Which type of neurons provides more precise localization of a stimulus on the sensory surface?

<p>Neurons with small receptive fields (A)</p> Signup and view all the answers

What mechanism increases the contrast between signals from neurons at the center of the stimulus and neurons on the edge, allowing for further discrimination?

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

In population coding, where is the information about the stimulus encoded?

<p>In the pattern of firing of multiple neurons (B)</p> Signup and view all the answers

How is stimulus intensity encoded by receptor cells?

<p>Through changes in the frequency of action potentials (C)</p> Signup and view all the answers

What happens when the dynamic range of receptor cells is maxed out?

<p>No increase in action potential response (A)</p> Signup and view all the answers

What affects the rate of action potentials?

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

What is the function of a photoreceptor?

<p>Detect light (B)</p> Signup and view all the answers

Which receptor is capable of detecting multiple modalities?

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

What is the process of transduction in sensory reception?

<p>Conversion of stimulus into changes in membrane potential (C)</p> Signup and view all the answers

How do action potentials encode for the type of stimulus?

<p>Via the receptor specificity and afferent neuron (A)</p> Signup and view all the answers

How can polymodal receptors encode more than one type of stimulus?

<p>Through graded potentials generating action potentials at different temporal rates (B)</p> Signup and view all the answers

What is the basis for stimulus modality specificity according to the text?

<p>High degree of receptor specificity and afferent neuron (D)</p> Signup and view all the answers

What type of neurons provide more precise localization of a stimulus on the sensory surface?

<p>Neurons with small receptive fields (D)</p> Signup and view all the answers

What type of receptors fire action potentials only when the stimulus begins and adapt quickly?

<p>Phasic receptors (A)</p> Signup and view all the answers

In population coding, where is the information about the stimulus encoded?

<p>In the pattern of firing of multiple neurons (C)</p> Signup and view all the answers

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