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Questions and Answers

Which lobe of the cerebral cortex is responsible for higher mental functions?

  • Occipital lobe
  • Temporal lobe
  • Frontal lobe (correct)
  • Parietal lobe
  • Which lobe of the cerebral cortex integrates sensory information from different modalities?

  • Parietal lobe (correct)
  • Frontal lobe
  • Temporal lobe
  • Occipital lobe
  • Which lobe of the cerebral cortex is responsible for auditory perception, semantics, and memory?

  • Frontal lobe
  • Temporal lobe (correct)
  • Parietal lobe
  • Occipital lobe
  • Which lobe of the cerebral cortex is the visual processing center?

    <p>Occipital lobe</p> Signup and view all the answers

    Which artery supplies blood to the frontal lobe?

    <p>Anterior cerebral artery</p> Signup and view all the answers

    Which type of somatic sensation is stimulated by mechanical displacement?

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

    Where are Meissner corpuscles primarily located?

    <p>Non-hairy skin close to the surface</p> Signup and view all the answers

    Which type of nerve fibers are associated with Merkel discs?

    <p>Aβ nerve fibers</p> Signup and view all the answers

    What is the function of Pacinian corpuscles?

    <p>Perception of distant events through transmitted vibrations</p> Signup and view all the answers

    Which type of nerve fibers are associated with free nerve endings?

    <p>Type C nerve fibers</p> Signup and view all the answers

    Which type of transmitter is usually excitatory in the CNS and accounts for more than 90% of the synaptic connections?

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

    What is the function of dendrites in stimulating neurons?

    <p>Receive signals from presynaptic neurons</p> Signup and view all the answers

    What is synaptic facilitation?

    <p>The increased transmitter release produced by an action potential that follows closely upon a preceding action potential</p> Signup and view all the answers

    What is the mechanism behind synaptic fatigue?

    <p>Repetitive stimulation of excitatory synapses</p> Signup and view all the answers

    What is the effect of acidosis on neuronal activity?

    <p>Depresses neuronal activity</p> Signup and view all the answers

    Which system contains large myelinated nerve fibers and transmits touch and vibration with a high degree of spatial fidelity?

    <p>Dorsal column-medial lemniscal system</p> Signup and view all the answers

    Which system contains smaller myelinated and unmyelinated fibers for slow transmission and transmits a broad spectrum of modalities including pain and thermal sensations?

    <p>Anterolateral system</p> Signup and view all the answers

    Which system maintains a high degree of spatial orientation throughout the tract and decussates in the medulla oblongata?

    <p>Dorsal column-medial lemniscal system</p> Signup and view all the answers

    Which system has a low degree of spatial orientation, decussates in the spinal cord, and transmits a broad spectrum of modalities including crude touch and pressure?

    <p>Anterolateral system</p> Signup and view all the answers

    Which part of the cortex receives information from the opposite side of the body and has unequal representation of the body?

    <p>Sensory cortex</p> Signup and view all the answers

    Which type of sensory receptor detects damage (pain receptors)?

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

    What is the term used to describe the principle that each receptor responds to a limited range of stimuli and has a direct line to the brain?

    <p>Labeled-line principle</p> Signup and view all the answers

    What generates receptor potentials through mechanical deformation?

    <p>Mechanical deformation</p> Signup and view all the answers

    Which type of receptor adapts slowly and continues to transmit impulses to the brain for long periods of time while the stimulus is present?

    <p>Slowly adapting (tonic) receptors</p> Signup and view all the answers

    What is the term used to describe the transmission of receptor information to the brain by different types of neurons?

    <p>Somatic sensory afferents</p> Signup and view all the answers

    Which part of the nervous system is responsible for responding to and moving about in our environment?

    <p>Motor Division</p> Signup and view all the answers

    Which level of CNS function controls subconscious body activities such as arterial pressure, respiration, and feeding reflexes?

    <p>Lower Brain Level</p> Signup and view all the answers

    What is the main body of a neuron called?

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

    Which neurotransmitter is the chief excitatory transmitter in the CNS?

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

    What type of summation occurs when EPSPs created by distant synapses overlap?

    <p>Spatial Summation</p> Signup and view all the answers

    Which part of the nervous system is responsible for responding to and moving about in our environment?

    <p>Motor Division</p> Signup and view all the answers

    What are the three major levels of CNS function?

    <p>Spinal cord level, lower brain level, higher brain or cortical level</p> Signup and view all the answers

    Which neurotransmitter is the chief excitatory transmitter in the CNS?

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

    What type of summation occurs when EPSPs created by distant synapses overlap?

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

    Which neurotransmitter opens Cl channels and is the chief inhibitory transmitter in the adult CNS?

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

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