Chapter Quiz 5 Flashcards
The brain recognizes action potentials from different sensory modalities as separate and distinct because
action potentials from different sensory modalities are carried on different nerve tracts
Which receptor types would be most useful for reading Braille?
Merkel’s discs
The _______ of a sensory neuron is the stimulus region that causes the cell to alter its firing rate.
receptive field
The progressive loss of sensitivity of a sensory receptor as a consequence of sustained stimulation is known as
sensory adaptation
The representation of the human body in the somatosensory cortex especially emphasizes the
hands and lips
Plasticity of somatosensory cortical maps is evident following
all of these answers are correct
-surgical transplant of a hand
-limb amputation in adults
-musical training
Which of the following is an example of synesthesia?
Envisioning bright fireworks whenever you hear Mozart
Mice that lack substance P exhibit
insensitivity to intensely painful stimuli but normal responses to mildly painful stimuli.
What part of the CNS integrates pain information?
cingulate cortex
Phantom limb pain is an example of ______ pain
neuropathic
Cannabis reduces pain by
stimulating endogenous cannabinoid receptors in the spinal cord and brain
Nervous system motor plans must balance a trade-off between
speed and accuracy
A motor unit is a
single motor neuron and all the muscle fibers it innervates
Which receptor is likely to respond to an overload that threatens to tear muscles or ligaments?
Golgi tendon organ
Severing sensory fibers from a monkey’s arm will cause the monkey to stop using that arm, but it will begin to use it again if the other (good) arm is restrained. This demonstrates that
proprioceptive information can be supplemented with feedback from other senses
The supplementary motor area and the premotor cortex are areas of
nonprimary motor cortex
Mirror neurons are especially interesting to researchers because
all of these answers are correct
-they appear to trigger specific movements
-they might be part of a neural system for empathy
-they fire when a monkey sees another monkey (or human) performing a simple movement previously performed by the monkey itself
Some individuals born without a ______ still show normal motor skills
cerebellum
Parkinson’s disease is linked to
degeneration of dopamine neurons of the substantia nigra
When athletes workout to improve their stamina, one of the goals is to enhance their
slow-twitch muscle fibers
