Neurotransmitters and Postsynaptic Potentials
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Questions and Answers

What type of sensation is detected by nociceptors?

  • Touch and pressure
  • Temperature and physical stimuli
  • Pain and tissue damage (correct)
  • Body awareness and movement

    • What is the function of Tactile Corpuscles?

  • Detecting two-point discrimination
  • Detecting light pressure (correct)
  • Detecting temperature and touch
  • Detecting deep pressure and vibration

    • What is the term for the ability of the brain to recognize the site of a stimulus?

  • Adaptation
  • Proprioception
  • Projection (correct)
  • Sensation

    • What is the effect of Glycine binding to its receptor on a neuron?

    <p>It causes hyperpolarization of the cell membrane. (C)</p> Signup and view all the answers

    What type of summation occurs when multiple presynaptic neurons fire simultaneously at the same postsynaptic neuron?

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

    What is the result of a stroke in the occipital lobe?

    <p>Total vision loss (C)</p> Signup and view all the answers

    What is the function of Merkel Disks?

    <p>Detecting two-point discrimination (B)</p> Signup and view all the answers

    What is the membrane potential at which an action potential is produced?

    <p>-55mV (B)</p> Signup and view all the answers

    What happens to the voltage-gated Na+ channels during an action potential?

    <p>Activation gates open and inactivation gates close. (C)</p> Signup and view all the answers

    What is the result of a stroke in the hippocampus?

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

    What is the characteristic of an action potential in terms of its magnitude?

    <p>It is of the same magnitude no matter how strong the stimulus. (C)</p> Signup and view all the answers

    What type of channels are always open in a neuron at rest?

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

    What type of memory combines short-term memory and lasts from days to years?

    <p>Long-term memory (D)</p> Signup and view all the answers

    Which part of the spinal cord supplies the upper limbs with nerves?

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

    What is the function of the meninges?

    <p>To protect the brain and spinal cord (C)</p> Signup and view all the answers

    What is the purpose of epidural anesthesia?

    <p>To relieve pain in a specific region (D)</p> Signup and view all the answers

    What is the function of the white matter in the CNS?

    <p>To transmit information to the brain and body (D)</p> Signup and view all the answers

    In which limbs would the crossed extensor reflex typically occur in a four-legged animal?

    <p>In all four limbs (C)</p> Signup and view all the answers

    What type of reflex helps Jeff maintain his arm position as he fills his cup with coffee?

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

    What type of reflex is the blinking of eyes?

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

    What happens to the muscle when the Golgi tendon reflex is triggered?

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

    What is the purpose of the dorsal root ganglion?

    <p>To process sensory information (A)</p> Signup and view all the answers

    Why did Hugo drop the weight during the competition?

    <p>The Golgi tendon reflex caused his arm muscles to relax (C)</p> Signup and view all the answers

    What is the difference between ascending and descending tracts?

    <p>Ascending tracts transmit sensory information, while descending tracts transmit motor information (D)</p> Signup and view all the answers

    What is the function of the arachnoid mater?

    <p>To protect the brain and spinal cord (C)</p> Signup and view all the answers

    What is the primary function of the Golgi tendon reflex?

    <p>Prevention of damage to tendons by relaxing skeletal muscles (A)</p> Signup and view all the answers

    What type of neuron is stimulated by the stretch of the muscle spindle?

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

    What is the primary function of the stretch reflex in maintaining arm position?

    <p>To monitor changes in weight (A)</p> Signup and view all the answers

    What occurs in the integrating center of the Golgi tendon reflex?

    <p>Sensory neurons synapse with inhibitory interneurons (C)</p> Signup and view all the answers

    What is the purpose of the conus medullaris?

    <p>To mark the end of the spinal cord (A)</p> Signup and view all the answers

    What is the role of the dorsal root in the withdrawal reflex?

    <p>Transmission of signals to the spinal cord (B)</p> Signup and view all the answers

    What type of innervation is responsible for relaxing muscles that oppose withdrawal in the withdrawal reflex?

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

    What is the result of the integration of sensory information in the withdrawal reflex?

    <p>Contraction of flexor muscles and relaxation of extensor muscles (C)</p> Signup and view all the answers

    What is the purpose of the Golgi tendon organs in the Golgi tendon reflex?

    <p>To respond to increased tension within tendons (B)</p> Signup and view all the answers

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