Neuroscience Exam Practice Questions & Answers
Best Rated A+
Which of the following statements accurately describes cortical mapping?
a. The representation of the body in the somatosensory map is proportional to body surface area.
b. Somatosensory representations are fixed and cannot change as a result of experience.
c. The better the spatial accuracy, the larger the representation of that area in the somatosensory cortex
d. All of the above
e. a and b only - Answer C
A sensory "receptor" potential is usually due to...
a. resting or "leak" currents in the cell body.
b. the activation of voltage-gated ion channels.
c. the activation of ligand-gated ion channels.
d. an external stimulus impinging upon sensory nerve endings.
e. an internal stimulus modifying a synaptic signal between two interneurons. - Answer E
Which of the following is/are true?
a. The receptive field of a sensory neuron is the skin surface which when stimulated results in AP firing
b. The extent of sensory neuron receptor ending branching determines the size of the receptive field
c. Spatial accuracy is the ability to discern between two stimuli separated by distance
d. All of the above
e. B and C - Answer D
Which of the following statement(s) regarding mechanoreceptors is/are false?
, I. Merkel receptor receptive fields are small; therefore, they provide high spatial resolution.
II. Meissner corpuscle receptive fields are large, but they are highly sensitive, therefore they have high
spatial resolution.
III. Although Pacinian corpuscle receptors are highly sensitive, they have huge receptive fields, therefore
they have low spatial resolution.
IV. Merkel and Ruffini receptors are expected to respond throughout the duration of a stimulus because
they are slowly adapting receptors.
V. Pacinian and Meissner receptors are expected to respond throughout the duration of a stimulus
because they are rapidly adapting receptors.
Group of answer choices
a. II, V only
b. III, V only
c. I, II, III, V
d. III only
e. All of the statements above are true. - Answer A
Which of the following is true for a sensory receptor potential but not true for a postsynaptic potential.
Group of answer choices
a. it is always excitatory
b. it can excitatory or inhibitory
c. it is a graded potential, therefore proportional to the intensity of the stimulus
d. if it is large enough to reach threshold it will trigger an action potential in the neuron
e. all of the above are true only for sensory receptor potentials - Answer A
Sam is determined that this is the year he will win the famous Pitt Chili Eating Contest. However, he is
not known to play fair. Which of the following would be most effective at helping him withstand the
heat from the Chile peppers, but not interfere with any other sensations?
Group of answer choices
a) Blocking TRPV1 receptors on his tongue
b) Blocking voltage-gated sodium channels in his C fibers
Best Rated A+
Which of the following statements accurately describes cortical mapping?
a. The representation of the body in the somatosensory map is proportional to body surface area.
b. Somatosensory representations are fixed and cannot change as a result of experience.
c. The better the spatial accuracy, the larger the representation of that area in the somatosensory cortex
d. All of the above
e. a and b only - Answer C
A sensory "receptor" potential is usually due to...
a. resting or "leak" currents in the cell body.
b. the activation of voltage-gated ion channels.
c. the activation of ligand-gated ion channels.
d. an external stimulus impinging upon sensory nerve endings.
e. an internal stimulus modifying a synaptic signal between two interneurons. - Answer E
Which of the following is/are true?
a. The receptive field of a sensory neuron is the skin surface which when stimulated results in AP firing
b. The extent of sensory neuron receptor ending branching determines the size of the receptive field
c. Spatial accuracy is the ability to discern between two stimuli separated by distance
d. All of the above
e. B and C - Answer D
Which of the following statement(s) regarding mechanoreceptors is/are false?
, I. Merkel receptor receptive fields are small; therefore, they provide high spatial resolution.
II. Meissner corpuscle receptive fields are large, but they are highly sensitive, therefore they have high
spatial resolution.
III. Although Pacinian corpuscle receptors are highly sensitive, they have huge receptive fields, therefore
they have low spatial resolution.
IV. Merkel and Ruffini receptors are expected to respond throughout the duration of a stimulus because
they are slowly adapting receptors.
V. Pacinian and Meissner receptors are expected to respond throughout the duration of a stimulus
because they are rapidly adapting receptors.
Group of answer choices
a. II, V only
b. III, V only
c. I, II, III, V
d. III only
e. All of the statements above are true. - Answer A
Which of the following is true for a sensory receptor potential but not true for a postsynaptic potential.
Group of answer choices
a. it is always excitatory
b. it can excitatory or inhibitory
c. it is a graded potential, therefore proportional to the intensity of the stimulus
d. if it is large enough to reach threshold it will trigger an action potential in the neuron
e. all of the above are true only for sensory receptor potentials - Answer A
Sam is determined that this is the year he will win the famous Pitt Chili Eating Contest. However, he is
not known to play fair. Which of the following would be most effective at helping him withstand the
heat from the Chile peppers, but not interfere with any other sensations?
Group of answer choices
a) Blocking TRPV1 receptors on his tongue
b) Blocking voltage-gated sodium channels in his C fibers
