Ch 15 Sensory Pathways and Somatic Nervous System

25 July 2022
4.7 (114 reviews)
55 test answers

Unlock all answers in this set

Unlock answers (51)
question
which of the following is not one of the special senses
answer
pressure
question
the general senses
answer
involve receptors that are relatively simple in structure
question
gustatory receptors are sensitive to dissolved chemicals but insensitive to light this is due to
answer
receptor specificity
question
in order for a sensation to become perception
answer
it must be received by the somatosensory cortex
question
which of the following can contribute to receptor specificity
answer
all of the answers are correct
question
examples of sensory stimuli include
answer
all of the answers are correct
question
central adaption refers to
answer
inhibition of nuclei located along a sensory pathway
question
a receptor potential may
answer
all of the answers are correct
question
peripheral adaption ___ the number of action potential that reach the CNS
answer
decreases
question
which of the following statements is true about general senses?
answer
they are distributed all over the body
question
sensory encoding of the perceived location of a stimulus depends on
answer
the specific location of the cortical neuron that is stimulated
question
action potentials from receptors involved in general sensations are interpreted in the
answer
primary sensory cortex
question
a receptor that contains many mechanically-gated ion channels would function best as a
answer
tactile receptor
question
Which of the following is/are sometimes called "prickling pain"
answer
fast pain
question
endorphins can reduce perception of sensations initiated by
answer
nociceptors
question
thermoreceptors
answer
all of the answers are correct
question
receptors that monitor the position of joints belong to the category called
answer
proprioceptors
question
mechanoreceptors that respond to changes in blood pressure are called
answer
baroreceptors
question
Sensations of burning or aching pain
answer
cause a generalized activation of the reticular formation and the thalamus
question
bladder fullness is to ________ as blood pH is to ________
answer
baroreceptors, chemoreceptors
question
a sensory receptor characterized peripherally as a free nerve ending which centrally uses glutamate and/or substance P as neurotransmitters would most likely be a
answer
nociceptor
question
we are constantly bombarded by a variety of stimuli inside and outside of our bodies. Why are we not overwhelmed by sensory information
answer
a very tiny percentage of incoming sensory information is received by the cerebral cortex
question
Pain is to ________ as cold is to ________
answer
nociceptors, thermoreceptors
question
if a friend is talking about someone she knows who lost his special senses, you would correct her when you hear her mention ________ because it is not a special sense.
answer
cold
question
________ are receptors in the aorta that monitor the blood pressure
answer
baroreceptors
question
Which of the following is a property of thermoreceptors
answer
monitor heat stimuli, not cold
question
chemoreceptors are located in all of the following except
answer
the skin
question
which ascending tract carries the sensations for fine touch and vibration
answer
posterior (dorsal) column
question
the spinal tract that carries sensations from proprioceptors to the CNS is the
answer
spinocerebellar
question
the spinal tract that relays information concerning pain and temperature to the CNS is the
answer
lateral spinothalamic
question
Your uncle was just diagnosed with a heart attack. One of his major symptoms is left arm pain. You are not surprised because you are familiar with the phenomenon of ________ pain
answer
referred
question
the spinal tract that relays information concerning crude touch and pressure to the CNS is the
answer
anterior spinothalamic
question
the afferent neuron that carries the sensation to the CNS is a ________ neuron
answer
first order
question
thalamic neurons that project to the primary sensory cortex are ________ neurons
answer
third order
question
which neuron delivers sensations to the CNS
answer
first order
question
we can localize sensations that originate in different areas of the body because
answer
sensory neurons from specific body regions project to specific cortical regions
question
the descending spinal tract that crosses to the opposite side of the body within the medulla oblongata is the ________ tract
answer
lateral corticospinal
question
descending (motor) pathways always involve at least ________ motor neuron
answer
two
question
the pyramidal system provides
answer
voluntary control over skeletal muscles
question
Upper motor neurons of the corticospinal tract synapse with neurons in
answer
the anterior gray horns of the spinal cord
question
The cerebellum relies on information from
answer
all answers are correct
question
The cerebellum
answer
has all of these characteristics
question
Based on the motor homunculus, which of the following body regions has the fewest number of motor units involved?
answer
back trunk
question
The basal nuclei
answer
provide the background patterns of movement involved in voluntary motor activities
question
Complex motor activities such as riding a bicycle
answer
require the coordinated activity of several regions of the brain
question
Sensory neurons that are always active are called ________ receptors
answer
tonic
question
A reduction in sensitivity in the presence of a constant stimulus is referred to as
answer
adaptation
question
The conversion of a sensory input to a change in membrane potential in the receptor is known as
answer
transduction
question
The link between peripheral receptor and cortical neuron is called a(n)
answer
labeled line
question
The ________ is the area monitored by a single receptor cell
answer
receptive field
question
A ________ potential is a depolarization of a sensory dendrite that can lead to an afferent nerve impulse if strong enough
answer
generator
question
Some neurons within the basal nuclei are known to
answer
inhibit neurons with GABA and stimulate neurons with acetylcholine
question
tickle
answer
pleasurable/ a light touch that moves across the skin
question
itch
answer
unpleasant/ itch spots in skin
question
name A to F
A
B
C
D
E
F
name A to F A B C D E F
answer
pyramids anterior corticospinal tract corticobulbar tract cerebral peduncle decussation of pyramids lateral corticospinal tract