Week 4 Summary - Brain and Behaviour (Sensation)
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Questions and Answers

Which part of the eye adjusts the amount of light allowed into the eye?

  • Pupil
  • Iris (correct)
  • Cornea
  • Retina
  • What are the specialized cells in the retina that convert light energy into nerve cell activity?

  • Iodopsin
  • Cones
  • Rods
  • Photoreceptors (correct)
  • What is the physical characteristic of sound that determines the difference in air pressure from a wave's baseline to its peak?

  • Wavelength
  • Frequency
  • Amplitude (correct)
  • Pitch
  • What is the structure in which transduction actually occurs in the inner ear?

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

    What is the term for the psychological dimension of sound that is determined by the amplitude of the sound wave?

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

    What is the term for the psychological dimension of sound that depends on the frequency of sound waves?

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

    What is the term for the sound's quality caused by complex wave patterns that are added onto the lowest, or fundamental, frequency of a sound?

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

    Which sense detects chemicals that are airborne or volatile?

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

    Which sense is responsible for detecting physical pressure on tissue?

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

    Which theory of color vision states that there are three types of visual elements in the eye, each most sensitive to a different wavelength?

    <p>Trichromatic Theory</p> Signup and view all the answers

    Which theory of color vision explains afterimages?

    <p>Opponent-Process Theory</p> Signup and view all the answers

    How does the brain analyze the location of sound?

    <p>Both A and B</p> Signup and view all the answers

    Which sense is responsible for proprioception, providing information about the position and movements of the body?

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

    How does the auditory system generally code intensity?

    <p>By the frequency of firing of the given neuron</p> Signup and view all the answers

    Which step in sensation involves accessory structures that collect and modify sensory stimuli?

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

    What is transduction in the context of sensation?

    <p>The process of converting incoming energy into nerve cell activity</p> Signup and view all the answers

    What is encoding in the context of sensation?

    <p>The translation of a stimulus' physical properties into neural activity</p> Signup and view all the answers

    What is the nature of the physical stimulus detected by the sense of vision?

    <p>Electromagnetic radiation</p> Signup and view all the answers

    What is the form/function of the accessory structure in vision?

    <p>Collects and modifies sensory stimuli</p> Signup and view all the answers

    What are the receptor cells involved in the sense of vision?

    <p>Neural receptors</p> Signup and view all the answers

    What are the psychological correlates of the stimulus dimensions in vision?

    <p>Great sensitivity and great sharpness</p> Signup and view all the answers

    According to the gate control theory of pain, what is the function of the 'gate' in the spinal cord?

    <p>It blocks pain impulses from traveling to the brain</p> Signup and view all the answers

    What may explain why rubbing the area around a wound eases pain?

    <p>Input from other skin senses takes over the pain pathways</p> Signup and view all the answers

    What is analgesia?

    <p>The absence of pain sensation in the presence of a normally painful stimulus</p> Signup and view all the answers

    Which of the following chemicals released by the body during stress play a role in blocking pain signals?

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

    What carries the emotional component of a painful stimulus to areas of the hindbrain and reticular formation?

    <p>Specific pathways</p> Signup and view all the answers

    How does cognition affect emotional responses to pain?

    <p>Cognition affects emotional responses to pain</p> Signup and view all the answers

    What is the effect of focusing on distracting thoughts on emotional responses to pain?

    <p>It decreases emotional responses to pain</p> Signup and view all the answers

    What are the learned responses associated with pain called?

    <p>Emotional components</p> Signup and view all the answers

    What is the role of the thalamus in the gate control theory of pain?

    <p>It carries the emotional component of a painful stimulus</p> Signup and view all the answers

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