ANATOMY & PHYSIOLOGY, 16TH
EDITION ALL CHAPTERS
Sensory impulses originate at receptors in response to
a) neurotransmitters
b) decreasing permeability of nerve cell membranes
c) subthreshold potential
d) local changes in their cell membrane potentials - CORRECT
ANSWER >>local changes in their cell membrane potentials
What type of receptor allows a pole vaulter to keep track of his
position in mid-air?
a) lamellated corpuscles
b) pain receptors
c) proprioceptors
d) baroreceptors - CORRECT ANSWER >>proprioceptors
The phrenic nerve arise from what nerve plexus?
a) cervical plexus
b) brachial plexus
c) lumbar plexus
d) sacral plexus - CORRECT ANSWER >>cervical plexus
,A myelinated nerve is ____, whereas an unmyelinated nerve fiber
is ________.
a) gray; white
b) white; black
c) white; gray
d) gray; black - CORRECT ANSWER >>white; gray
The choroid plexus located in the _____ secretes most of the
cerebrospinal fluid
a) lateral ventricles
b) third ventricle
c) fourth ventricle
d) cerebral aqueduct - CORRECT ANSWER >>lateral ventricles
What type of sleep is dreamless and associated with decreased
blood pressure and respiratory rate?
a) REM sleep
b) Non-REM sleep - CORRECT ANSWER >>Non-REM sleep
The resulting cell membrane is more permeable to which ion?
a) potassium
b) sodium
,c) calcium
d) magnesium - CORRECT ANSWER >>potassium
Impulses from taste receptors travel to the central nervous system
via the facial, glossopharyngeal, and vagus nerves? T or F -
CORRECT ANSWER >>true
What compromises the central nervous system?
a) spinal and cranial nerves
b) brain and spinal cord
c) brain and cranial nerves
d) nerves in the upper and lower limbs - CORRECT ANSWER
>>brain and spinal cord
For most people, the dominant cerebral hemisphere is their ____
hemisphere
a) left
b) right - CORRECT ANSWER >>left
A positive feedback loop occurs when the outcome of an event
causes the event to continue occurring and amplifies its effects.
Which of the following aspects of an action potential constitutes a
positive feedback loop?
, a) an initial flow of sodium ions into the neuron causes the
opening of more voltage-gated sodium channels, rapidly causing
more sodium to enter
b) opening of voltage-gated channels causes the voltage-gated
potassium channels to open and release potassium to the
extracellular environment, slowly counteracting sodium influx
c) the sodium-potassium pump exactly balances ion links by
pumping three sodium and two potassium ions across the
membrane
d) the threshold potential is around -55mV - CORRECT ANSWER
>>an initial flow of sodium ions into the neuron causes the
opening of more voltage-gated sodium channels, rapidly causing
more sodium to enter
Nerve fibers of the somatic nervous system serve the
__________, and nerve fibers of the autonomic nervous system
serve the __________.
a) skin and skeletal muscles; viscera
b) viscera; smooth muscle
c) heart and intestines; skeletal and smooth muscles
d) smooth and skeletal muscles; cardiac muscles - CORRECT
ANSWER >>skin and skeletal muscles; viscera