Physiology 101 - Introduction to Human Physiology » Fall 2020 » Lecture Exam 2 (B)
Need help with your exam preparation?
Get Answers to this exam for $6 USD.
Get Answers to all exams in [ Physiology 101 - Introduction to Human Physiology ] course for $25 USD.
Existing Quiz Clients Login here
Question #1
Fluid movement in the cochlea causes:Check all that could apply,,
A.
displacement of the round window, which dissipates pressure in the cochlea.
B.
increased fluid pressure against the cochlear duct by the fluid of the scala vestibuli
C.
movement of the basilar membrane relative to the tectorial.
D.
movement of the tectorial membrane relative to the vestibular
E.
the hairs of the receptor cells of the Organ of Corti to be bent
Question #2
Which of the following symptoms would a patient with a lesion (injury) that destroyed the right side of the spinal cord in the region of the upper back be most likely to experience?
A.
Loss of pain in the right foot
B.
Loss of both pressure sense and pain in the right foot
C.
Loss of pain in the left foot
Question #3
Which of these occurs when light strikes photoreceptors?
A.
The photoreceptor cells are stimulated and fireaction potentials.
B.
There is an increase in neurotransmitter release from photoreceptor cells.
C.
The concentration of cyclic GMP inside cells increases.
D.
The photoreceptor cell membranebecomes depolarized.
E.
The chromophore retinal undergoes a change of shape.
Question #4
What category do hair cells in the organ of Corti belong to?
A.
Mechanoreceptors
B.
Proprioceptors
C.
Photoreceptors
D.
Chemoreceptors
E.
Nociceptors
Question #5
Nicotinic receptors:
A.
bind acetylcholine released from both sympathetic and parasympathetic postganglionic fibers.
B.
are found primarily in the heart.
C.
bind acetylcholine released from parasympathetic preganglionic fibers.
D.
bind with norepinephrine released from sympathetic postganglionic fibers.
E.
bind acetylcholine released from both sympathetic and parasympathetic preganglionic fibers.
Question #6
Which of the following is true?
A.
the ventral root contains axons of afferent, sensory neurons
B.
the dorsal root conducts motor information
C.
afferent, sensory neurons are unipolar neurons with cell bodies located in the dorsal root ganglion
D.
spinal nerves are for the conduction of motor information only
Question #7
Which of the following does not occur in a photoreceptor during exposure to light?
A.
bleaching of opsin.
B.
decreased depolarization of the photoreceptor's plasma membrane
C.
excitation of bipolar cells
D.
closure of Na+ channels and decreased Na+ flow into the photoreceptor
E.
increased neurotransmitter release from the synaptic terminal of the photoreceptor.
Question #8
Select the correct statements about Lower motor neurons. Choose all that could apply,,
A.
their activity is influenced by upper motor neurons
B.
they are also known as somatic motor neurons
C.
they exit from the anterior gray horn
D.
they secrete dopamine
E.
they are part of the final common pathway
F.
they can excite or inhibit skeletal muscles
Question #9
A person struggling with a stressful exam question might experience difficulty focusing her eyes on the paper because
A.
activation of her parasympathetic nerves inhibits contraction of her ciliary muscles.
B.
activation of her parasympathetic nerves causes sudden contraction of her ciliary muscles.
C.
she suddenly develops presbyopia.
D.
activation of her sympathetic nerves causes sudden contraction of her ciliary muscles.
E.
activation of her sympathetic nerves inhibits contraction of her ciliary muscles.
Question #10
Which of the following is incorrect regarding the cerebellum:
A.
plays a role in controlling eye movement together with the inner ear.
B.
is important for the maintenance of balance.
C.
can be consciously controlled.
D.
contains numerous nuclei connected by a network of white matter tracts.
E.
compares the intentions of the higher motor centers with the performance of the muscles and corrects this information resulting in coordinated muscle movements
Question #11
The efferent division of the peripheral nervous system consists of the somatic nervous system and the autonomic nervous system.
A.
TRUE
B.
FALSE
Question #12
Olfactory receptors:Choose all that could apply,,
A.
are replaced by cells known as basal cells.
B.
when stimulated send impulses both to the limbic system and to the cortex for perception of smell.
C.
are specialized endings of afferent neurons called chemoreceptors
D.
bind chemicals called odorants
Question #13
The sympathetic division of the autonomic nervous system is arranged so that it acts largely as a unit, whereas the components of the parasympathetic division generally act as discrete,independent components.
A.
TRUE
B.
FALSE
Question #14
A person whose lens focuses light from distant objects in front of (rather than on) the retina has a condition called
A.
cataract.
B.
glaucoma.
C.
presbyopia.
D.
myopia.
E.
hyperopia.
Question #15
Which is TRUE about typical, resting neurons?
A.
The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions.
B.
The plasma membrane is most permeable to sodium ions.
C.
The plasma membrane is completely impermeable to sodium ions.
D.
The concentration of sodium ion is greater inside the cell than outside.
E.
The plasma membrane is completely impermeable to potassium ions.
Question #16
Which of the following neurotransmitter receptors will typically be found within the sympathetic nervous division? Check all that could apply,,
A.
adrenergic
B.
muscarinic
C.
nicotinic
Question #17
The function of the tympanic membrane is to amplify sound waves on their way to the middle ear.
A.
TRUE
B.
FALSE
Question #18
The trigger zone of a neuron:Choose all that could apply,,
A.
is where action potentials are first generated.
B.
is found in the soma of the neuron
C.
contains voltage-gated channels.
D.
is located in the axon hillock.
E.
contains ligand-gated channels
Question #19
Most of the parasympathetic ganglia lie in trunk-like chains found just outside the vertebral column.
A.
TRUE
B.
FALSE
Question #20
Which is TRUE about receptor potentials?
A.
They are action potentials.
B.
They propagate without decrement.
C.
They always trigger action potentials.
D.
They can be graded and vary with stimulus strength.
E.
They generally occur at the axon hillock of afferent neurons.
Question #21
A.
amygdala.
B.
cingulate gyrus.
C.
olfactory bulb
D.
hippocampus.
E.
mammillary body.
F.
primary visual cortex
Question #22
Contraction of intrafusal muscle fibers are controlled by
A.
gamma motor neurons
B.
lower motor neurons
C.
nictonic motor neurons
D.
delta motor neurons
E.
upper motor neurons
Question #23
Which is/are TRUE about the resting membrane potential? Check all that could apply,,
A.
It is oriented so that the cell's interior is negative with respect to the extracellular fluid.
B.
It is not altered by changing concentration gradients of permeating ions.
C.
It requires ions to be distributed unevenly across the plasma membrane of a cell.
D.
Only nerve and muscle cells have a potential difference across the membrane at rest.
E.
in neurons, it is created mainly by potassium ion leakage
F.
It has the same value in all cells.
Question #24
Which is TRUE about the Na+, K+ ATPase pump in neurons?
A.
It transports equal numbers of sodium and potassium ions with each pump cycle.
B.
It maintains a concentration gradient for K + such that diffusion forces favor movement of K + into the cell.
C.
It pumps 3 Na + ions into the cell for every 2 K + ions it pumps out.
D.
It maintains an electrical gradient at the equilibrium potential of K +.
E.
It generates a small electrical potential such that the inside of a neuron is made negative with respect to the outside.
Question #25
If the lens flattened with age, what type of vision would become easier over time for this individual?
A.
Both near and distance vision are fine, but changing back and forth between them becomes difficult
B.
Near vision (e.g., reading a book)
C.
No light will enter the eye and blindness will result
D.
Both near and distance vision are compromised
E.
Distance vision (e.g., reading a street sign)
Question #26
The _________________ is the single most important control area for regulating the homeostasis of the internal environment.
A.
Mitochondria
B.
Pituitary gland
C.
Hypothalamus
D.
Pineal gland
Question #27
If, during awake brain surgery, a doctor accidentally depolarized a neuron within the somatosensory cortex, which of these is most likely?
A.
The patient would perceive nothing.
B.
The patient would perceive a specific, localized sensation in one body area.
C.
The patient would perceive a general sensation over one side of the body.
D.
The patient would perceive a general sensation all over the body.
Question #28
Which of the following statements concerning the terminal ganglia is correct? Check all that could apply,,
A.
the otic ganglia are found near the parotid gland
B.
The terminal ganglia contain muscarinic receptors.
C.
Terminal ganglia give rise to sympathetic neurons
D.
Terminal ganglia are the final common pathway for the autonomic nervous system.
E.
Terminal ganglia lie in a chain located along either side of the spinal cord.
F.
Long parasympathetic preganglionic fibers end at the terminal ganglia, which lie in or near the effector organ.
Question #29
Sequence the following events correctly following the arrival of the action potential in the synaptic terminal. 1. Neurotransmitter diffuses across cleft. 2. Calcium induces exocytosis of neurotransmitter from the synaptic terminal. 3. Permeability and membrane potential of postsynaptic membrane altered. 4. Ion channels open. 5. Neurotransmitter binds to receptor on chemically-gated channel expressed on the target neuron.
A.
3, 1, 4, 5, 2
B.
2, 1, 5, 4, 3
C.
5, 4, 3, 1, 2
D.
1, 2, 3, 5, 4
E.
1, 4, 3, 2, 5
Question #30
The membrane potential of most neurons at rest is
A.
equal to the equilibrium potential for potassium.
B.
more positive than the equilibrium potential for sodium.
C.
more positive than the equilibrium potential for potassium.
D.
equal to the equilibrium potential for sodium.
E.
slightly more negative than the equilibrium potential of potassium ion.
Question #31
Smell and taste require sensory receptors known as __________________________
A.
mechanoreceptor
B.
thermoreceptor
C.
chemoreceptor
D.
photoreceptor
Question #32
Which of the following statements regarding sensory systems is correct?
A.
Some sensory receptors are modifications of the peripheral endings of efferent neurons.
B.
The term "adequate stimulus" means that a stimulus is strong enough to be detected.
C.
The term "sensory unit" refers to a group of receptors that receive a particular stimulus and the afferent neuron associated with those receptors.
D.
All sensory information that reaches the brain can be experienced as a conscious sensation.
E.
Sensory information that leads to conscious awareness of the stimulus is called transduction.
Question #33
You pass by the office of a practitioner of alternative medicine. A poster hanging in the window offers therapies that result in “activation of the brainstem and sacral portions of the spinal cord.” The poster is promoting methods that will result in enhanced activation of the _____________________________nervous system.
A.
parassympathetic
B.
assympathetic
C.
parasympathetic
D.
sympathetic
Question #34
Which protein(s) are involved in the development of the resting membrane potential of a neuron? Choose all that could apply,,
A.
Na+ leak channels
B.
Na+/K+ pumps.
C.
Na+ voltage-gated channels.
D.
K+ leak channels.
Question #35
Certain smells can trigger shifts in emotional state (for example, the smell of a familiar place or a loved one’s clothing) because specific olfactory pathways synapse in the __________.
A.
frontal lobes of the cerebral cortex
B.
temporal lobes of the cerebral cortex
C.
occipital lobes of the cerebral cortex
D.
somatosensory cortex
E.
limbic system
Question #36
Upper motor neurons can be found making up the
A.
medial leminscus tract
B.
spinocerebellar tract
C.
lateral corticospinal tract
D.
anterior spinothalmic tract
E.
the posterior column
Question #37
Which of the following statements with regard to vision is FALSE?
A.
There are four different chromophore moleculesin the retina.
B.
There are normally four different photopigments in the retina.
C.
Photoreceptors are neurons.
D.
There are four different opsins in the retina.
E.
There are two basic types of photoreceptors in the retina, rods, and cones.
Question #38
When you eat a spicy pepper, such as a jalepeño, why do you perceive heat in your mouth?
A.
Friction while chewing activates thermoreceptors.
B.
All of the answer choices are correct.
C.
A chemical within the jalepeño acts as a stimulus for thermoreceptors.
D.
Chemoreceptors can activate heat sensing parts of the brain.
E.
The breakdown of chemicals within the pepper causes exothermic reactions in the mouth.
Question #39
Match the stimulus with the sensory receptor: oxygen concentration
A.
nociceptor
B.
photoreceptor
C.
thermoreceptor
D.
chemoreceptor
Question #40
Match the stimulus with the sensory receptor: heat and cold
A.
photoreceptor
B.
nociceptor
C.
chemoreceptor
D.
thermoreceptor
Question #41
Match the stimulus with the sensory receptor: light
A.
photoreceptor
B.
mechanoreceptor
C.
chemoreceptor
D.
thermoreceptor
Question #42
Match the stimulus with the sensory receptor: solute concentration
A.
chemoreceptor
B.
thermoreceptor
C.
nociceptor
D.
photoreceptor
Question #43
Match the stimulus with the sensory receptor: skeletal muscle stretch
A.
mechanoreceptor
B.
nociceptor
C.
chemoreceptor
D.
thermoreceptor
Question #44
Match the stimulus with the sensory receptor: pain chemicals
A.
nociceptor
B.
thermoreceptor
C.
photoreceptor
D.
chemoreceptor
Question #45
Which best describes the process of "adaptation" in sensory receptors?
A.
Persistence of the sensation of a limb even after it has been severed from the body
B.
A decrease in receptor sensitivity despite continuation of a stimulus
C.
Information from sensory receptorsreaches the cerebral cortex and the person becomes aware of it
D.
A depolarization of receptive membrane that increase in magnitude as the stimulus intensity increases
E.
Conversion of the energy of a stimulus into a pattern of electrical activity
Question #46
Match the neuron to the neurotransmitter its releases: sympathetic preganglionic fibers.
A.
dopamine
B.
norepinephrine
C.
serotonin
D.
acetylcholine
Question #47
Match the neuron to the neurotransmitter its releases: parasympathetic preganglionic fibers.
A.
norepinephrine
B.
acetylcholine
C.
histamine
D.
dopamine
Question #48
Match the neuron to the neurotransmitter its releases: sympathetic postganglionic fibers.
A.
histamine
B.
norepinephrine
C.
acetylcholine
D.
serotonin
Question #49
Match the neuron to the neurotransmitter its releases: motor neurons.
A.
histamine
B.
serotonin
C.
acetylcholine
D.
dopamine
Question #50
Match the neuron to the neurotransmitter its releases: parasympathetic postganglionic fibers.
A.
histamine
B.
norepinephrine
C.
acetylcholine
D.
serotonin
Question #51
Choose the best answer describing the corticospinal pathway
A.
occurs in unmyelinated nerve fibers.
B.
is comprised of lower motor neurons controlled by local circuit neurons and upper motor neurons arising from the cerebellum
C.
is comprised of lower motor neurons controlled by local circuit neurons
D.
is comprised of lower motor neurons controlled by upper motor neurons arising from the motor cortex
E.
always results in muscle contraction
Question #52
Which of the following structures contributes the most to the total refractive ability of the eye when viewing objects at a distance?
A.
lens
B.
ciliary muscle
C.
retina
D.
cornea
E.
iris
Question #53
The hypothalamus:Choose all that could apply,,
A.
functions as the body's thermostat
B.
secretes hormones
C.
plays a role in emotional and behavioral patterns.
D.
controls thirst, urine output, and food intake.
E.
inhibits muscle tone throughout the body.
F.
is a relay station for sensory input on its way to the cerebral cortex.
Question #54
Descending tracts
A.
carry impulses from the periphery to the CNS.
B.
are part of the peripheral nervous system.
C.
transmit signals derived from afferent receptors up the spinal cord to the brain.
D.
relay messages from the brain down to the spinal cord to efferent neurons.
E.
carry impulses from the CNS to the periphery.
Question #55
Your friend is poking your skin with two pins a few millimeters apart at the same time. Visually, you can see there are two pins, but you can only feel a single pen poke. This is probably because:
A.
both pens are activating the same receptor.
B.
the receptors in both skin areas utilize the same afferent neuron.
C.
both afferent neurons converge on the same interneuron.
D.
both sensations are grouped together in the somatosensory cortex.
Question #56
Which of the following are considered to be part of the basal ganglia?Choose all that could apply,,,,
A.
putamen
B.
globus pallidus
C.
mammilary body
D.
caudate nucleus
E.
substantia nigra
F.
cingulate gyrus
Question #57
Which of the following statements regarding vision is FALSE?
A.
Myopia is a condition in which the lens focuses light from distant objects behind the retina.
B.
Cataract is an increase in opacity (clouding) of the lens.
C.
The image of an object that is focused on the retina is upside down relative to the object's actual position in space.
D.
Presbyopia is a condition in which the lens cannot accommodate adequately for near vision.
E.
The cornea refracts light rays more strongly than the lens.
Question #58
_______________________________ is the bending of light rays as they pass from one medium to another.
A.
Refraction
B.
Deflection
C.
Retraction
D.
Reflection
Question #59
A threshold stimulus applied to an excitable membrane is one that is just sufficient to
A.
trigger an action potential.
B.
trigger an excitatory postsynaptic potential.
C.
cause a change in membrane potential.
D.
depolarize a dendrite.
E.
be conducted to the axon hillock.
Question #60
Which of the following would be categorized as a ,,,,
A.
pain
B.
Vision
C.
Pressure
D.
Sound
E.
Proprioception
F.
Cold and warmth
Question #61
Put the following in the correct order for the activity of a photoreceptor in the "light" (2 points) • 1. cis-retinal absorbs light and shifts to trans-retinal form • 2.decrease in cGMP levels closes gated Na+ channels • 3. cGMP phosphodiesterase activity results in the breakdown of cGMP • 4. bleaching of opsin • 5. bipolar cells are no longer inhibited • 6. photoreceptor becomes hyperpolarized & glutamate release stops • 7. opsin activates transducin (a G protein) in the cell membrane of the disc • 8. transducin activates an effector protein called cGMP Phosphodiesterase • 9. ganglion cells generate AP • 10. processing of signals in primary visual cortex
A.
1,4,7,8,3,2,6,5,9,10
B.
1,4,8,7,3,2,5,6,9,10
C.
1,3,2,5,7,6,8,4,9,10
D.
1,3,2,6,5,9,10,4,8,7
Question #62
Accommodation for near vision requires
A.
contraction of the ciliary muscles.
B.
increased rounding of the cornea.
C.
activation of the sympathetic nervous system.
D.
flatteningof the lens.
E.
dilation of the pupil.
Question #63
To see an object, for example a cat, and know that it is a cat that you have seen before, your brain receives and processes the visual input. Which brain areas are involved? Check all that would apply.,,
A.
Occipital lobe association area
B.
Parietal lobe association area
C.
Somatosensory cortex
D.
Primary Visual cortex
E.
Primary Auditory cortex
Question #64
Hair cells in the semicircular canals detect changes in the rate of angular motion of the head, while the same kinds of cells in the utricle and saccule detect changes in the head's rate of linear motion.
A.
FALSE
B.
TRUE
Question #65
_________ matter consists predominantly of densely packaged cell bodies and dendrites, whereas ________ matter consists of bundles of myelinated nerve fibers.
A.
Gray, White
B.
Brown, Gray
C.
White, Gray
D.
Black, White
Question #66
The rods and cones synapse with _________ cells which in turn synapse with ________ cells before exiting the eye as the optic nerve.
A.
horizontal, inner
B.
bipolar, ganglion
C.
somatic, catalyst
Question #67
If you block Ca 2+ channels on an axon, which will not occur?
A.
The depolarization phase of the action potential
B.
The graded potential
C.
The repolarization phase of the action potential
D.
All of these will not occur
E.
The exocytosis of neurotransmitter
Question #68
Which is FALSE about interneurons?
A.
They receive synaptic input from other neurons in the CNS.
B.
They deliver synaptic input on other neurons.
C.
They make synapses on effector organs in the PNS.
D.
They can transmit information between afferent neurons and efferent neurons.
E.
They sum excitatory and inhibitory synaptic inputs.
Question #69
Put the following events describing hearing by the organ of corti in the correct order • 1. sound waves hit the tympanic membrane • 2. movement of the oval window creates changes in the fluid pressure in scala vestibuli and tympani • 3. the fluid wave propagates along the cochlea & the scala vestibuli fluid presses in on the cochlear duct • 4. ossicles vibrate • 5. round window bulges out • 6. the basilar membrane shifts with respect to the tectorial membrane • 7. the stapes transfers these vibrations into the fluid of the inner ear • 8. cochlear duct pushes out on scala tympani • 9. hair cells are stimulated
A.
1, 7, 4, 6, 3, 2, 9, 8, 5
B.
1, 4, 7, 2, 3, 9, 6, 5, 8
C.
1, 4, 2, 3, 5, 6, 9, 8, 7
D.
1, 4, 7, 2, 3, 6, 9, 8, 5
Need help with your exam preparation?
Get Answers to this exam for $6 USD.
Get Answers to all exams in [ Physiology 101 - Introduction to Human Physiology ] course for $25 USD.
Existing Quiz Clients Login here