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227 A&P Exam 6
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Questions in this quiz (50)
1__________ brace and anchor neurons to capillaries
- Amicroglia
- Bastrocytes
- Cependymal
- Dschwann
- Esatellite
2Choose the correct phrase
- Anerves are found in the PNS
- Btracts are almost entirely in the PNS
- Ccranial nerves are found within the brain
- Dgray matter is only in the cerebral cortex
- Ewhite matter is only found in the brain
3Choose the correct phrase about sensory neurons
- Athe action potential of the central process flows toward the cell body
- Bthe peripheral process is closest to the CNS
- Cthe receptive endings are found on the peripheral process
- Dmost sensory neurons are bipolar
- Ethe cell body is wrapped by Schwann cells
4Scenario: a neuron is being measured at -20mV and the voltage is increasing. Which is true?
- Apotassium gates must be closed
- Bit now requires a larger than normal graded potential to cause an action potential
- Ca state of hyperpolarization exists
- Dthe cell would fire an action potential less easily
- Eopening the potassium gates would depolarize the cell
5Which is an all-or-none events?
- Areceptor potentials
- Bexcitatory postsynaptic potentials
- Cinhibitory postsynaptic potentials
- Daction potentials
- Eall but one of these is graded
6Which is true?
- Asodium gates open at +30 mV
- Bpotassium gates close at +30 mV
- C100 mV is required to open axonal calcium gates
- Dopening sodium gates hyperpolarizes a neuron
- Epotassium gates close to hyperpolarize a neuron
7Which of the following is a positive feedback process?
- Areceptor potential
- BEPSP
- CIPSP
- Daction potential
- Eall of these are positive feedback
8Choose the correct phrase
- Athe conduction velocity of axons is 100 meters per second
- Bunmyelinated axons are faster because the myelin is obstructive
- Cthe action potential is smaller in shorter axons
- Dabsolute refractory occurs after relative refractory
- Esaltatory conduction occurs in unmyelinated axons
9What would happen if we blocked presynaptic calcium gates from opening?
- Apresynaptic action potentials would never occur
- Bpresynaptic chemically sensitive gates would never open
- Cpostsynaptic potentials would not occur
- Dthe postsynaptic axon hillock would experience 5 mV stimulus
- EAChEase would not be able to keep up with the excess ACh
10Choose the correct phrase about REM
- Aalso called slow wave sleep
- Boccurs after slow wave sleep has been achieved
- Cmost nightmares occur during this phase of sleep
- Doxygen consumption is slightly less than in NREM
- Eoccurs between stages 2 and 3 of NREM
11Parkinsonism is the result of a problem in the
- Amedulla
- Bcerebellum
- Cdiencephalon
- Dmidbrain
- Espinal cord
12Important control centers for cardiac, respiration and blood pressure function are located in the
- Amedulla oblongata
- Bthalamus
- Cpons
- Dcerebellum
- Emidbrain
13Where do we find the superior colliculi?
- Abrain stem
- Bmedulla
- Cpons
- Ddiencephalon
- Ethalamus
14The limbic system is associated with
- Acontrolling heart rate
- Bemotions
- Cprecise motor activity
- Dmaintaining consciousness
- Erelaying sensory impulses to the sensory map
15Which structure controls sleep/wake cycles?
- Aepithalamus
- Bbrain stem
- Chypothalamus
- Dpituitary gland
- Esubstantia nigra
16The axonal connections between gyri of opposite hemispheres are called
- Acommissural
- Binterventricular
- Cprojection
- Dassociation
- Eascending and descending
17Scenario: a person had a stroke affecting the left prefrontal cortex. As a result
- Asensations will not be felt on the left side of the body
- Bsensations will not be felt on the right side of the body
- Cproblems moving left side effectors will occur
- Dthe person cannot hear from their right ear or see to their left
- Ethere may be problem with complex learning and intellect
18Which is true about Broca's area?
- Ais the main motor relay center
- Bcontrols the substantia nigra
- Crelays auditory reflexes
- Dis also called the language area
- Econtrols some neck muscles
19Choose the correct phrase
- Amotor impulses are ascending
- Bsensory impulses are efferent
- Cassociation neurons typically possess central and peripheral processes
- Dsensory cell bodies are located in the CNS
- Esome motor cell bodies are located in CNS nuclei
20What happens to pressure in the ventricular system if the cerebral aqueduct is blocked?
- Apressure falls in the 3rd ventricle
- Bpressure rises in the 4th ventricle
- Cno change in pressure
- Dpressure rises in the 3rd, but falls in the laterals
- Epressure rises in the laterals
21Which of the following is correct?
- AACh is a neurotransmitter found only in the peripheral nervous system
- BACh is only classified by structure or function, but not by both
- Cbiogenic amines are found in most PNS circuits
- Dmetabotropic neurotransmitters use intracellular second messengers
- Emore than one of these is correct
22A __________ is a cluster of cell bodies in the PNS
- Anerve
- Bpyramidal cell
- Cganglion
- Dnucleus
- Etract
23Which of the following is correct about a resting neuron?
- Athe sodium/potassium pumps are always running
- Bpotassium constantly leaks into the cell
- Csodium is always leaking out of the cell
- Dthe calcium pump maintains resting ion levels
- Ecalcium is found in the SR
24__________ waves are seen when concentrating
- Aalpha
- Bbeta
- Ctheta
- Ddelta
- Egamma
25Which is a way the numerical value of the resting membrane potential can be expressed?
- Athe inside of the fiber is 70mV
- Bthe outside of the fiber is -70mV
- Cthe inside of the fiber is 70mV more positive than the outside
- Dthe outside of the fiber is 70mV more positive than the inside
- Enone of these conditions is correct
26Which one of the following is true about memory?
- Aalmost unlimited data can be stored in STM
- BNa+ channel blockers helps memory
- CLTM neurons have different mRNA
- DLTM is limited to 7-8 bits of information
- Eslight parasympathetic dominance helps memory processes
27The membrane potential of a resting neuron is maintained by
- ANa+ gates
- Ban active process
- Cdiffusion
- Dpassive forces
- Eosmosis
28A neurotransmitter that increases postsynaptic permeability to potassium results in
- Aan EPSP
- Ban IPSP
- Cstabilization of sodium and potassium levels
- Da refractory period that lasts up to 2 seconds
- Ebreakdown of the all-or-none principle
29During the absolute refractory period a second action potential can be produced
- Awhen the second stimulus is larger than the threshold
- Bwhen the second stimulus is less than the 20mV
- Cif multiple stimuli are given in a short duration
- Dunder no circumstances
- Eif the cell is hyperpolarized
30Which best defines the concept: summation?
- Aneurotransmitter combines with a receptor on a postsynaptic neuron
- Bseveral IPSPs have just reached threshold level
- Cthe effect of graded potentials are added together
- Dthe presynaptic neuron summates all of its vesicles
- Eadding the total number of neurons in a specific circuit
31What eventually happens when action potentials reach the axon terminals of an EPSP neuron?
- Acalcium gates will open in the terminals
- Bsummation will always result
- Can action potential occurs in the postsynaptic dendrite
- Da single IPSP will always result
- Ecalcium exocytosis will cause neurotransmitter release
32__________are small oval shaped phagocytes
- Aastrocytes
- Bmicroglial
- Cependymal
- Dsatellite cells
- Eoligodendrocytes
33Which of the following is most correct?
- Athe magnitude or size of the action potential is +30 mV
- Ball axons send graded potentials to their terminals
- Caction potentials must reach the axon hillock in order to start an action potential
- D20 mV must reach the axon hillock in order to start an action potential
- Eit takes 20 mV to cause an action potential in a hyperpolarized cell
34Select the correct statement
- Adiverging circuits are amplifying circuits
- Bconverging circuits are common in sensory and motor pathways
- Cparallel after discharge circuits are involved in problem solving skills
- Dreverbrating circuits are circular pathways
- Eall of these are true
35Select the correct statement
- Aa single neuron can release all types of neurotransmitters
- Bgray matter is considered to be a tract
- Cunmyelinated neurons are insulated from one another
- Da receptor potential is exactly like an action potential
- ESchwann cells build the endoneurium
36Which is true about presynaptic inhibition?
- Aincreases the graded potential delivered to the postsynaptic cell
- Bwill reduce the graded potential experienced by the postsynaptic cell
- Cincreases parasympathetic neurotransmitter release
- Daffects the amount of AChEase released
- Eworks just like a generator potential
37Which is the best way to repolarize a neuron?
- Aopen sodium gates
- Buse a sodium/potassium pump
- Copen potassium gates
- Dopen both sodium and potassium gates at the same time
- Eopen chemically sensitive potassium gates
38Select the correct statement
- Achemically sensitive gates are found in synapses
- Bchemically sensitive sodium gates are found in axon membrane
- Cdue to diffusion, sodium wants to flow out of a normal neuron
- Dchemically sensitive potassium gates are found in the axonal endings
- Ecalcium gates are mostly found in the postsynaptic dendrite
39What happens if we reverse the wires on a meter that is measuring resting potential in a neuron?
- Athe meter remains at -70 mV
- Bthe meter now reads +70 mV
- Cthe meter reads zero mV
- Dthe meter would jump to +30 mV
- Ethe meter indicates a hyperpolarized state
40Which is true about graded potentials?
- Aoccur on axons and dendrites
- Bare sometimes 100 mV in magnitude
- Cthey are considered all-or-none
- Dtheir magnitude is typically -50 mV
- Ecould be 15 mV in magnitude
41Choose the correct phrase
- Amotor impulses are considered ascending
- Bassociation circuits are exclusively in the spinal cord
- Cactivating glands is an afferent function
- Dsomatic pathways activate cardiac muscle
- Eautonomic impulses control smooth muscle
42Which cell is associated with multiple sclerosis?
- Aependymal cells
- BSchwann cells
- Csatellite cells
- Dastrocytes
- Eoligodendrocytes
43Schwann cell membrane tightly wrapped around axons is called __________
- Aneurilemma
- Bnode of Ranvier
- Cmyelin
- Dendoneurium
- Eperineurium
44Which is true?
- Athe transverse fissure separates frontal from parietal lobes
- Bthe central sulcus separates the cerebrum from the cerebellum
- Cwe discussed only two fissures in the human brain
- Dthe lateral sulcus divides the cerebrum into two hemispheres
- Ethere are only two sulci
45Which is true?
- Athe dominant hemisphere is considered language dominant
- Bthe left hemisphere is always dominate
- Ca person that is right dominant is always ambidexterous
- Dart and music appreciation are attributed to the dominant hemisphere
- Elogic, math, reasoning skills are associated with the non-dominant hemisphere
46Scenario: a presynaptic neuron summates three 5 mV EPSPs. What happens?
- Aa 105 mV potential will travel down it's axon
- Baxon hillock will send 20 mV to the dendrites
- C100 mV will reach it's axonal endings
- Dthe postsynaptic cell will not receive neurotransmitter from it
- Epostsynaptic dendrites will propagate an action potential
47Which connects the cerebellum to the brain stem?
- Acerebellar peduncles
- Bsuperior colliculi
- Cthe pons
- Dcerebral peduncles
- Emedulla oblongata
48Which is true?
- Aanterograde amnesia is the loss of past memories
- Babsence seizures are the most severe form
- Ceyes rapidly moving during NREM
- D"consciousness" is the best understood of all neurophysiology
- Etonic-clonic seizures were formerly called grand mal
49Which is the "sensory map" of the body?
- ABroca's area
- Bprimary somatosensory cortex
- Csomatosensory association cortex
- Dprefrontal cortex
- Ethe general interpretation area
50What would happen to a cell if you destroyed it's Nissl bodies?
- Ait's function would be improved
- Bprotein production would be affected
- Cion gate function would immediately cease
- DATP level would increase
- Emitochondria would increase activity to make more protein
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- Description
- Practice test for A&P 227 Exam 6 - North Idaho College
- Author
- Mary Roth
- Language
- English
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