PNB Exam 3 Study Questions &
answers already passed
What is the best definition of the "receptive field" of afferent neuron X carrying information
about touch or temperature? - ANS ✔✔the area of the body that, when stimulated, leads to
activity in neuron X
The dorsal horn of the spinal cord contains _______________ . - ANS ✔✔synapses between
unipolar sensory neurons and interneurons
What occurs when light strikes photoreceptors? - ANS ✔✔the concentration of cyclic GMP
inside photoreceptors decreases.
What is true about the cerebellum? - ANS ✔✔it compares the movement in progress to the
intended movement.
The primary somatosensory cortex (S1) is contained in the ____ and the primary visual cortex
(V1) is contained in the ____. - ANS ✔✔parietal lobe, occipital lobe
what function is associated with the thalamus? - ANS ✔✔transmission of sensory information
the optic nerve is a ___ nerve - ANS ✔✔sensory
consider transmission of a discriminatory touch stimulus. as a result of lateral inhibition, the __
is increased. - ANS ✔✔difference between firing rate of strongly activated and less-strongly
activated second order neurons.
, At what point does sensory information carried by the spinothalamic tract cross to the
contralateral side? - ANS ✔✔in the spinal cord
Sensory transduction is the process of converting ____ - ANS ✔✔stimulus energy into receptor
potential.
like the dorsal column system, the anterolateral system _____. - ANS ✔✔carries sensory
information
increasing intensity of a pressure stimulus (applied to the same spot on your finger) is coded by
___ (assuming threshold is met) - ANS ✔✔increasing amplitude of receptor potential and
frequency of afferent AP
what type of sensory information would most likely activate a rapidly adapting receptor? - ANS
✔✔vibration
2 point discrimination is __ on the lips than on the knee. One reason for this is that there is ___
rep of the lips on the primary somatosensory cortex. - ANS ✔✔better, more
the ability to precisely localize the origin of a stimulus is enhanced by __. - ANS ✔✔overlapping
receptive fields, small receptive fields, lateral inhibition wiring at synapse sited in ascending
pathway
in order to focus upon close objects, the __ contract - ANS ✔✔ciliary muscles
proprioceptors such as muscle spindles play a role in __ - ANS ✔✔transducing muscle length,
changes in muscle length, activating deep tendon reflexes such as the knee jerk, and body
awareness
answers already passed
What is the best definition of the "receptive field" of afferent neuron X carrying information
about touch or temperature? - ANS ✔✔the area of the body that, when stimulated, leads to
activity in neuron X
The dorsal horn of the spinal cord contains _______________ . - ANS ✔✔synapses between
unipolar sensory neurons and interneurons
What occurs when light strikes photoreceptors? - ANS ✔✔the concentration of cyclic GMP
inside photoreceptors decreases.
What is true about the cerebellum? - ANS ✔✔it compares the movement in progress to the
intended movement.
The primary somatosensory cortex (S1) is contained in the ____ and the primary visual cortex
(V1) is contained in the ____. - ANS ✔✔parietal lobe, occipital lobe
what function is associated with the thalamus? - ANS ✔✔transmission of sensory information
the optic nerve is a ___ nerve - ANS ✔✔sensory
consider transmission of a discriminatory touch stimulus. as a result of lateral inhibition, the __
is increased. - ANS ✔✔difference between firing rate of strongly activated and less-strongly
activated second order neurons.
, At what point does sensory information carried by the spinothalamic tract cross to the
contralateral side? - ANS ✔✔in the spinal cord
Sensory transduction is the process of converting ____ - ANS ✔✔stimulus energy into receptor
potential.
like the dorsal column system, the anterolateral system _____. - ANS ✔✔carries sensory
information
increasing intensity of a pressure stimulus (applied to the same spot on your finger) is coded by
___ (assuming threshold is met) - ANS ✔✔increasing amplitude of receptor potential and
frequency of afferent AP
what type of sensory information would most likely activate a rapidly adapting receptor? - ANS
✔✔vibration
2 point discrimination is __ on the lips than on the knee. One reason for this is that there is ___
rep of the lips on the primary somatosensory cortex. - ANS ✔✔better, more
the ability to precisely localize the origin of a stimulus is enhanced by __. - ANS ✔✔overlapping
receptive fields, small receptive fields, lateral inhibition wiring at synapse sited in ascending
pathway
in order to focus upon close objects, the __ contract - ANS ✔✔ciliary muscles
proprioceptors such as muscle spindles play a role in __ - ANS ✔✔transducing muscle length,
changes in muscle length, activating deep tendon reflexes such as the knee jerk, and body
awareness
