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

Which sense detects chemicals that are airborne or volatile?

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

Which sense is responsible for detecting physical pressure on tissue?

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

Which theory of color vision explains afterimages?

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

How does the brain analyze the location of sound?

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

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

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

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

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

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

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

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

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

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

<p>Great sensitivity and great sharpness (D)</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 (B)</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 (D)</p> Signup and view all the answers

What is analgesia?

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

How does cognition affect emotional responses to pain?

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

What are the learned responses associated with pain called?

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

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