Part 1 of 7 - 18.0/ 18.0 Points
Question 1 of 32
3.0/ 3.0 Points
What is the science that deals with the normal functioning and the disorders of the nervous system is called?
A.neuropathology
B.pathology
C.neurology
D.neuroscience
E.endocrinology
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Question 2 of 32
3.0/ 3.0 Points
When a neuron is said to be depolarized:
A.the Na+ is outside and the K+ is inside the membrane.
B.the Na+ is inside and the K+ is outside the membrane.
C.the Na+ and K+ are outside the membrane.
D.The Na+ outside equals the K+ inside.
E.the Na+ and K+ are inside the membrane.
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Question 3 of 32
3.0/ 3.0 Points
Neurons conducts impulses completely. This is called the:
A.electrical excitability.
B.All or none principle.
C.refractory period.
D.threshold.
E.hyperpolarization.
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Question 4 of 32
3.0/ 3.0 Points
Depolarization of a membrane is begins with the
A.closing of potassium channels.
B.closing of sodium channels.
C.opening of potassium channels.
D.opening of chlorine channels.
E.opening of sodium channels.
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Question 5 of 32
3.0/ 3.0 Points
Saltatory conduction refers to the conduction of impulses in
A.skeletal muscle.
B.unmyelinated fibers.
C.myelinated fibers.
D.cardiac muscle.
E.all axons.
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Question 6 of 32
3.0/ 3.0 Points
All of the following are part of the PNS EXCEPT:
A.neuroendocrine system.
B.somatic nervous system.
C.autonomic nervous system.
D.enteric nervous system.
E.sympathetic branch.
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Part 2 of 7 - 15.0/ 15.0 Points
Question 7 of 32
3.0/ 3.0 Points
The central nervous system (CNS) consists of the
A.brain.
B.spinal cord.
C.cranial nerves.
D.all of the above.
E.brain and spinal cord.
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Question 8 of 32
3.0/ 3.0 Points
All of the following areas are associated with memory EXCEPT
A.parts of the diencephalon.
B.cerebellum.
C.parietal, occipital, and temporal lobes.
D.frontal lobe.
E.parts of the limbic system
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Question 9 of 32
3.0/ 3.0 Points
Damage to the choroid plexus would interfere with
A.glycogen storage.
B.impulse conduction.
C.myelin production.
D.formation of cerebrospinal fluid.
E.motor movements of the upper limbs.
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Question 10 of 32
3.0/ 3.0 Points
Parkinson's disease is due to the degeneration of dopamine-producing neurons in the
A.hippocampus.
B.cerebellum.
C.substantia nigra.
D.cerebral peduncles.
E.medulla.
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Question 11 of 32
3.0/ 3.0 Points
The dorsal root contains
A.somatic fibers only.
B.motor fibers only.
C.autonomic fibers only.
D.both sensory and motor fibers.
E.sensory fibers only.
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Part 3 of 7 - 15.0/ 15.0 Points
Question 12 of 32
3.0/ 3.0 Points
All of the following are true about preganglionic fibers of the sympathetic division EXCEPT
A.they leave the spinal cord through the anterior root.
B.they are longer than the postganglionic fibers.
C.they synapse with many postganglionic cell bodies.
D.they use acetylcholine as the neurotransmitter.
E.they usually have many branches.
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Question 13 of 32
3.0/ 3.0 Points
Nearly 80% of parasympathetic outflow is conducted through
A.spinal nerves from the thoracic region.
B.spinal nerves from the sacral region.
C.the vagus nerve.
D.the oculomotor nerve.
E.the glossopharyngeal nerve.
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Question 14 of 32
3.0/ 3.0 Points
Horner's Syndrome is
A.caused by loss of parasympathetic control of one side of the body.
B.characterized by increased twitching and sweating.
C.only seen in the elderly.
D.caused by a loss of sympathetic control to one side of the face.
E.all of the above.
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Question 15 of 32
3.0/ 3.0 Points
The autonomic nervous system
A.has one motor neuron from the CNS to the effector.
B.innervates skeletal muscles.
C.is always excitatory.
D.operates without conscious control.
E.is under voluntary control.
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Question 16 of 32
3.0/ 3.0 Points
The ganglia that run vertically along both sides of the backbone are the
A.terminal ganglia.
B.dorsal root ganglia.
C.superior mesenteric ganglia.
D.prevertebral ganglia.
E.sympathetic trunk ganglia.
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Part 4 of 7 - 18.0/ 18.0 Points
Question 17 of 32
3.0/ 3.0 Points
The “white” of the eye is called the
A.cornea.
B.iris.
C.conjunctiva.
D.sclera.
E.retina.
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Question 18 of 32
3.0/ 3.0 Points
The cranial nerves involved in the gustatory pathways are the
A.facial, glossopharyngeal, and vagus.
B.vagus, hypoglossal, and abducens.
C.glossopharyngeal, vagus, and gustatory.
D.optic, glossopharyngeal, and facial.
E.vestibulochochlear, abducens, and hypoglossal.
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Question 19 of 32
3.0/ 3.0 Points
Which of the following types of receptors are NOT part of the somatic senses?
A.temperature receptors
B.photoreceptors
C.pressure receptors
D.touch receptors
E.proprioceptors
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Question 20 of 32
3.0/ 3.0 Points
Vallate papillae are found in an inverted V-shaped row at the
A.back of the tongue.
B.side of the tongue.
C.margin of the tongue.
D.middle of the tongue.
E.tip of the tongue.
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Question 21 of 32
3.0/ 3.0 Points
Olfactory receptors
A.are located in the nasal cavity.
B.are stimulated by inhaled chemicals.
C.adapt rapidly.
D.have knob-shaped dendrites containing olfactory hairs.
E.all of the above are correct.
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Question 22 of 32
3.0/ 3.0 Points
The inability to clearly see near objects is called
A.glaucoma
B.nearsightedness.
C.hypermetropia
D.myopia
E.astigmatism
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Part 5 of 7 - 15.0/ 21.0 Points
Question 23 of 32
0.0/ 3.0 Points
How did increasing the stimulus voltage in the simulation affect the action potential?
A.a decrease in the rate of propagation of the action potential
B.no change to the action potential
C.an increase in the size of the action potential
D.an increase in the rate of propagation of the action potential
I picked D but it was wrong...
Feedback: Learning Objective: Explain why the size of an action potential does not change when stimulus intensity is increased.
Please review Lab Exercise 3, Activity 3.
Question 24 of 32
3.0/ 3.0 Points
If the resting membrane potential of a neuron is -70 mV and the threshold voltage of that neuron 9s -50 mV, then the neuron must be depolarized by a minimum of _____ mV before an action potential is generated.
A.10 mV
B.15 mV
C.20 mV
D.30 mV
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Question 25 of 32
3.0/ 3.0 Points
Why does the threshold increase when the interval between the stimuli decreases?
A.Sodium is flowing out of the cell.
B.Some sodium channels have been inactivated and cannot be reopened immediately.
C.Calcium is flowing out the cell.
D.Potassium is flowing into the cell.
Feedback: Correct!
Question 26 of 32
3.0/ 3.0 Points
An axon that is more negative than the resting membrane potential is said to be _______.
A.hyperpolarized
B.graded
C.depolarized
D.at threshold
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Question 27 of 32
3.0/ 3.0 Points
What effect did decreasing the extracellular sodium have on the resting membrane potential?
A.Only a small change occurred, because the sodium channels were mostly open.
B.The resting membrane potential disappeared.
C.Only a small change occurred, because the resting neuron is not very permeable to sodium.
D.The resting membrane potential became less negative.
Feedback: Correct!
Question 28 of 32
3.0/ 3.0 Points
When measuring refractory periods, as the interval between stimuli decreases, the depolarization needed to generate the second action potential:
A.stays the same
B.increases
C.decreases
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Question 29 of 32
0.0/ 3.0 Points
The channels that provide for the movement of potassium in the resting neuron are _______.
A.voltage gated
B.leakage and chemically gated
C.leakage
D.chemically gated
I chose A and it was incorrect
Feedback: Learning Objective: Describe the cellular transport mechanisms responsible for establishing the resting membrane potential.
Please review Lab Exercise 3, Activity 1.
Part 6 of 7 - 8.0/ 8.0 Points
Answer the following question in your own words without using any resources. Your answer should be written in complete sentences using correct grammar, spelling, and terminology.
Question 30 of 32
4.0/ 4.0 Points
Briefly explain how the sodium-potassium pump helps to maintain the resting membrane potential.
Sodium-potassium pumps move two potassium into the cell and three sodium ions out of the cell to maintain a negative charge within the cell. This helps to maintain the resting membrane potential.
Feedback: Learning Objective: Describe the cellular transport mechanisms responsible for establishing the resting membrane potential.
Please review Lab Exercise 3, Activity 1.
Question 31 of 32
4.0/ 4.0 Points
Briefly explain why an action potential cannot be initiated during the absolute refractory period.
During the absolute refractory period, the neuron cannot be excited to generate a second action potential no matter how intense the stimulus.
Feedback: Learning Objective: Explain why an action potential cannot be initiated during the absolute refractory period.
Please review Lab Exercise 3, Activity 5.
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