Physiology 101 - Introduction to Human Physiology » Fall 2020 » Lecture Exam 2 (B)

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Question #1
Fluid movement in the cochlea causes:Check all that could apply,,
A.   movement of the tectorial membrane relative to the vestibular
B.   displacement of the round window, which dissipates pressure in the cochlea.
C.   the hairs of the receptor cells of the Organ of Corti to be bent
D.   movement of the basilar membrane relative to the tectorial.
E.   increased fluid pressure against the cochlear duct by the fluid of the scala vestibuli
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 pain in the left foot
C.   Loss of both pressure sense and pain in the right foot
Question #3
Which of these occurs when light strikes photoreceptors?
A.   The chromophore retinal undergoes a change of shape.
B.   There is an increase in neurotransmitter release from photoreceptor cells.
C.   The photoreceptor cells are stimulated and fireaction potentials.
D.   The concentration of cyclic GMP inside cells increases.
E.   The photoreceptor cell membranebecomes depolarized.
Question #4
What category do hair cells in the organ of Corti belong to?
A.   Mechanoreceptors
B.   Nociceptors
C.   Photoreceptors
D.   Chemoreceptors
E.   Proprioceptors
Question #5
Nicotinic receptors:
A.   are found primarily in the heart.
B.   bind acetylcholine released from both sympathetic and parasympathetic preganglionic fibers.
C.   bind acetylcholine released from both sympathetic and parasympathetic postganglionic fibers.
D.   bind acetylcholine released from parasympathetic preganglionic fibers.
E.   bind with norepinephrine released from sympathetic postganglionic 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.   increased neurotransmitter release from the synaptic terminal of the photoreceptor.
E.   closure of Na+ channels and decreased Na+ flow into the photoreceptor
Question #8
Select the correct statements about Lower motor neurons. Choose all that could apply,,
A.   they exit from the anterior gray horn
B.   their activity is influenced by upper motor neurons
C.   they are also known as somatic motor neurons
D.   they can excite or inhibit skeletal muscles
E.   they secrete dopamine
F.   they are part of the final common pathway
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 causes sudden contraction of her ciliary muscles.
B.   activation of her parasympathetic nerves inhibits contraction of her ciliary muscles.
C.   activation of her sympathetic nerves causes sudden contraction of her ciliary muscles.
D.   activation of her sympathetic nerves inhibits contraction of her ciliary muscles.
E.   she suddenly develops presbyopia.
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.   contains numerous nuclei connected by a network of white matter tracts.
C.   compares the intentions of the higher motor centers with the performance of the muscles and corrects this information resulting in coordinated muscle movements
D.   is important for the maintenance of balance.
E.   can be consciously controlled.
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.   when stimulated send impulses both to the limbic system and to the cortex for perception of smell.
B.   are specialized endings of afferent neurons called chemoreceptors
C.   bind chemicals called odorants
D.   are replaced by cells known as basal cells.
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.   presbyopia.
B.   cataract.
C.   glaucoma.
D.   myopia.
E.   hyperopia.
Question #15
Which is TRUE about typical, resting neurons?
A.   The plasma membrane is completely impermeable to potassium ions.
B.   The permeability of the plasma membrane to potassium ions is much greater than its permeability 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 most permeable to sodium ions.
Question #16
Which of the following neurotransmitter receptors will typically be found within the sympathetic nervous division? Check all that could apply,,
A.   muscarinic
B.   nicotinic
C.   adrenergic
Question #17
The function of the tympanic membrane is to amplify sound waves on their way to the middle ear.
A.   FALSE
B.   TRUE
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.   is located in the axon hillock.
D.   contains ligand-gated channels
E.   contains voltage-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 can be graded and vary with stimulus strength.
B.   They propagate without decrement.
C.   They always trigger action potentials.
D.   They are action potentials.
E.   They generally occur at the axon hillock of afferent neurons.
Question #21
Which of the following is/are structural component of the limbic system? Check all that could apply,  ,
A.   cingulate gyrus.
B.   mammillary body.
C.   hippocampus.
D.   olfactory bulb
E.   primary visual cortex
F.   amygdala.
Question #22
Contraction of intrafusal muscle fibers are controlled by
A.   gamma motor neurons
B.   upper motor neurons
C.   delta motor neurons
D.   nictonic motor neurons
E.   lower motor neurons
Question #23
Which is/are TRUE about the resting membrane potential? Check all that could apply,,
A.   in neurons, it is created mainly by potassium ion leakage
B.   It requires ions to be distributed unevenly across the plasma membrane of a cell.
C.   It is oriented so that the cell's interior is negative with respect to the extracellular fluid.
D.   Only nerve and muscle cells have a potential difference across the membrane at rest.
E.   It is not altered by changing concentration gradients of permeating ions.
F.   It has the same value in all cells.
Question #24
Which is TRUE about the Na+, K+ ATPase pump in neurons?
A.   It pumps 3 Na + ions into the cell for every 2 K + ions it pumps out.
B.   It generates a small electrical potential such that the inside of a neuron is made negative with respect to the outside.
C.   It transports equal numbers of sodium and potassium ions with each pump cycle.
D.   It maintains an electrical gradient at the equilibrium potential of K +.
E.   It maintains a concentration gradient for K + such that diffusion forces favor movement of K + into the cell.
Question #25
If the lens flattened with age, what type of vision would become easier over time for this individual?
A.   Near vision (e.g., reading a book)
B.   Both near and distance vision are compromised
C.   Distance vision (e.g., reading a street sign)
D.   No light will enter the eye and blindness will result
E.   Both near and distance vision are fine, but changing back and forth between them becomes difficult
Question #26
The _________________ is the single most important control area for regulating the homeostasis of the internal environment.
A.   Pituitary gland
B.   Mitochondria
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 a specific, localized sensation in one body area.
B.   The patient would perceive nothing.
C.   The patient would perceive a general sensation all over the body.
D.   The patient would perceive a general sensation over one side of the body.
Question #28
Which of the following statements concerning the terminal ganglia is correct? Check all that could apply,,
A.   Long parasympathetic preganglionic fibers end at the terminal ganglia, which lie in or near the effector organ.
B.   the otic ganglia are found near the parotid gland
C.   Terminal ganglia are the final common pathway for the autonomic nervous system.
D.   The terminal ganglia contain muscarinic receptors.
E.   Terminal ganglia lie in a chain located along either side of the spinal cord.
F.   Terminal ganglia give rise to sympathetic neurons
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.   1, 2, 3, 5, 4
B.   2, 1, 5, 4, 3
C.   3, 1, 4, 5, 2
D.   1, 4, 3, 2, 5
E.   5, 4, 3, 1, 2
Question #30
The membrane potential of most neurons at rest is
A.   equal to the equilibrium potential for sodium.
B.   more positive than the equilibrium potential for potassium.
C.   slightly more negative than the equilibrium potential of potassium ion.
D.   equal to the equilibrium potential for potassium.
E.   more positive than the equilibrium potential for sodium.
Question #31
Smell and taste require sensory receptors known as __________________________
A.   photoreceptor
B.   chemoreceptor
C.   thermoreceptor
D.   mechanoreceptor
Question #32
Which of the following statements regarding sensory systems is correct?
A.   The term "adequate stimulus" means that a stimulus is strong enough to be detected.
B.   Some sensory receptors are modifications of the peripheral endings of efferent neurons.
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.   Sensory information that leads to conscious awareness of the stimulus is called transduction.
E.   All sensory information that reaches the brain can be experienced as a conscious sensation.
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.   assympathetic
B.   sympathetic
C.   parassympathetic
D.   parasympathetic
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+ voltage-gated channels.
C.   K+ leak channels.
D.   Na+/K+ pumps.
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.   occipital lobes of the cerebral cortex
B.   temporal lobes of the cerebral cortex
C.   somatosensory cortex
D.   frontal lobes of the cerebral cortex
E.   limbic system
Question #36
Upper motor neurons can be found making up the
A.   the posterior column
B.   lateral corticospinal tract
C.   medial leminscus tract
D.   anterior spinothalmic tract
E.   spinocerebellar tract
Question #37
Which of the following statements with regard to vision is FALSE?
A.   Photoreceptors are neurons.
B.   There are normally four different photopigments in the retina.
C.   There are four different opsins in the retina.
D.   There are four different chromophore moleculesin 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.   A chemical within the jalepeño acts as a stimulus for thermoreceptors.
B.   All of the answer choices are correct.
C.   Chemoreceptors can activate heat sensing parts of the brain.
D.   The breakdown of chemicals within the pepper causes exothermic reactions in the mouth.
E.   Friction while chewing activates thermoreceptors.
Question #39
Match the stimulus with the sensory receptor: oxygen concentration
A.   photoreceptor
B.   thermoreceptor
C.   nociceptor
D.   chemoreceptor
Question #40
Match the stimulus with the sensory receptor: heat and cold
A.   chemoreceptor
B.   nociceptor
C.   photoreceptor
D.   thermoreceptor
Question #41
Match the stimulus with the sensory receptor: light
A.   chemoreceptor
B.   thermoreceptor
C.   mechanoreceptor
D.   photoreceptor
Question #42
Match the stimulus with the sensory receptor: solute concentration
A.   nociceptor
B.   chemoreceptor
C.   thermoreceptor
D.   photoreceptor
Question #43
Match the stimulus with the sensory receptor: skeletal muscle stretch
A.   chemoreceptor
B.   mechanoreceptor
C.   thermoreceptor
D.   nociceptor
Question #44
Match the stimulus with the sensory receptor: pain chemicals
A.   photoreceptor
B.   thermoreceptor
C.   chemoreceptor
D.   nociceptor
Question #45
Which best describes the process of "adaptation" in sensory receptors?
A.   Information from sensory receptorsreaches the cerebral cortex and the person becomes aware of it
B.   Conversion of the energy of a stimulus into a pattern of electrical activity
C.   A depolarization of receptive membrane that increase in magnitude as the stimulus intensity increases
D.   Persistence of the sensation of a limb even after it has been severed from the body
E.   A decrease in receptor sensitivity despite continuation of a stimulus
Question #46
Match the neuron to the neurotransmitter its releases: sympathetic preganglionic fibers.
A.   norepinephrine
B.   dopamine
C.   acetylcholine
D.   serotonin
Question #47
Match the neuron to the neurotransmitter its releases: parasympathetic preganglionic fibers.
A.   histamine
B.   acetylcholine
C.   norepinephrine
D.   dopamine
Question #48
Match the neuron to the neurotransmitter its releases: sympathetic postganglionic fibers.
A.   acetylcholine
B.   histamine
C.   norepinephrine
D.   serotonin
Question #49
Match the neuron to the neurotransmitter its releases: motor neurons.
A.   acetylcholine
B.   dopamine
C.   histamine
D.   serotonin
Question #50
Match the neuron to the neurotransmitter its releases: parasympathetic postganglionic fibers.
A.   histamine
B.   norepinephrine
C.   serotonin
D.   acetylcholine
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.   always results in muscle contraction
D.   is comprised of lower motor neurons controlled by local circuit neurons
E.   is comprised of lower motor neurons controlled by upper motor neurons arising from the motor cortex
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.   iris
C.   ciliary muscle
D.   cornea
E.   retina
Question #53
The hypothalamus:Choose all that could apply,,
A.   is a relay station for sensory input on its way to the cerebral cortex.
B.   functions as the body's thermostat
C.   plays a role in emotional and behavioral patterns.
D.   inhibits muscle tone throughout the body.
E.   controls thirst, urine output, and food intake.
F.   secretes hormones
Question #54
Descending tracts
A.   transmit signals derived from afferent receptors up the spinal cord to the brain.
B.   carry impulses from the CNS to the periphery.
C.   relay messages from the brain down to the spinal cord to efferent neurons.
D.   are part of the peripheral nervous system.
E.   carry impulses from the periphery to the CNS.
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 afferent neurons converge on the same interneuron.
B.   both sensations are grouped together in the somatosensory cortex.
C.   both pens are activating the same receptor.
D.   the receptors in both skin areas utilize the same afferent neuron.
Question #56
Which of the following are considered to be part of the basal ganglia?Choose all that could apply,,,,
A.   globus pallidus
B.   cingulate gyrus
C.   substantia nigra
D.   putamen
E.   mammilary body
F.   caudate nucleus
Question #57
Which of the following statements regarding vision is FALSE?
A.   The cornea refracts light rays more strongly than the lens.
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.   Myopia is a condition in which the lens focuses light from distant objects behind the retina.
E.   Presbyopia is a condition in which the lens cannot accommodate adequately for near vision.
Question #58
_______________________________ is the bending of light rays as they pass from one medium to another.
A.   Reflection
B.   Refraction
C.   Deflection
D.   Retraction
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.   depolarize a dendrite.
D.   cause a change in membrane potential.
E.   be conducted to the axon hillock.
Question #60
Which of the following would be categorized as a ,,,,
A.   Proprioception
B.   pain
C.   Cold and warmth
D.   Vision
E.   Pressure
F.   Sound
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.   1,3,2,6,5,9,10,4,8,7
B.   1,3,2,5,7,6,8,4,9,10
C.   1,4,8,7,3,2,5,6,9,10
D.   1,4,7,8,3,2,6,5,9,10
Question #62
Accommodation for near vision requires
A.   contraction of the ciliary muscles.
B.   activation of the sympathetic nervous system.
C.   increased rounding of the cornea.
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.   Somatosensory cortex
B.   Primary Visual cortex
C.   Occipital lobe association area
D.   Primary Auditory cortex
E.   Parietal lobe association area
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.   TRUE
B.   FALSE
Question #65
_________ matter consists predominantly of densely packaged cell bodies and dendrites, whereas ________ matter consists of bundles of myelinated nerve fibers.
A.   Brown, Gray
B.   White, Gray
C.   Black, White
D.   Gray, 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.   somatic, catalyst
B.   bipolar, ganglion
C.   horizontal, inner
Question #67
If you block Ca 2+ channels on an axon, which will not occur?
A.   The graded potential
B.   The exocytosis of neurotransmitter
C.   The repolarization phase of the action potential
D.   The depolarization phase of the action potential
E.   All of these will not occur
Question #68
Which is FALSE about interneurons?
A.   They deliver synaptic input on other neurons.
B.   They make synapses on effector organs in the PNS.
C.   They receive synaptic input from other neurons in the CNS.
D.   They sum excitatory and inhibitory synaptic inputs.
E.   They can transmit information between afferent neurons and efferent neurons.
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, 4, 7, 2, 3, 9, 6, 5, 8
B.   1, 7, 4, 6, 3, 2, 9, 8, 5
C.   1, 4, 2, 3, 5, 6, 9, 8, 7
D.   1, 4, 7, 2, 3, 6, 9, 8, 5

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