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Quiz von Sina Moglestue, aktualisiert more than 1 year ago
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Erstellt von Sina Moglestue
vor fast 8 Jahre
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Frage 1
Frage
In a polarized neuron at rest, which ion is concentrated outside the cell?
Antworten
-
Na+
-
Ca++
-
None of the above
-
K+
Frage 2
Frage
The period of time in which the neuron cannot generate another action potential is called the
Antworten
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all or none period
-
refractory period
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latent period
-
sublimial period
Frage 3
Frage
A typical resting membrane potential is
Antworten
-
+30 mv
-
0 mv
-
-70 mv
-
+100 mv
Frage 4
Frage
Impulses are conducted from one neuron to another across a
Antworten
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Ganglion
-
synapse
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neurofibral node
-
neuroeffector junction
Frage 5
Frage
Which of the following is true about synapses?
Antworten
-
Neurotransmitters are released by the dendrites at synapses
-
information jumps synapses in the form of electric arcs
-
neurotransmitters are released in the form of Na and K vesicles
-
information passes in only one direction across synapses
Frage 6
Frage
Which of the following best describes the transmission of an impulse along a neuron?
Antworten
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the movement of a neurotransmitter along a neuronal membrane
-
sodium and potassium ions moving over the surface of the neuron
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a wave of depolarization spreading from the point of the stimulus
-
positive charges spreading over the surface of an excitable cell
Frage 7
Frage
Which of the following is released by a presynaptic neuron to generate an impulse in the postsynaptic neuron?
Antworten
-
an electric spark
-
integrators
-
neurotransmitters
-
packets of sodium and potassium
Frage 8
Frage
The thalamus and hypothalamus are parts of the brain located in the
Antworten
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Diencephalon
-
Pons
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Medulla oblongata
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Midbrain
Frage 9
Frage
the ability of neurons to respond to stimuli and convert them to impulse is called
Antworten
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excitability
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faciliation
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summation
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depolarization
Frage 10
Frage
the type of neuroglial cell found between neurons and blood vessels that join parts by numerous cellular processes are
Antworten
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astrocytes
-
ependymal cells
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oligodendrocytes
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microglial cells
Frage 11
Frage
emotions of fear, anger, and pleasure are produced by the
Antworten
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pons
-
cerebellum
-
limbic system
-
medulla oblongata
Frage 12
Frage
which of the following is not a structural feature of a neuron?
Antworten
-
neurolemma
-
synapse
-
missl granules
-
axon
Frage 13
Frage
the job of maintaining homeostasis is a function of the ___ and ___ systems
Antworten
-
nervous...endocrine
-
nervous...digestive
-
endocrine...digestive
-
urinary...digestive
Frage 14
Frage
if a neuron within the CNS has its axon severed,
Antworten
-
the neuron will be spurred to reproduce a fully functional one
-
the neuron will lose its funstion
-
the neuron will most likely die
-
it will soon regenerate
Frage 15
Frage
It can be said that in a resting neuron, the
Antworten
-
inside of the cell is more electropositive than the outside
-
concentration of K+ ions is greater outside the cell
-
membrane is polarized
-
all of the above
Frage 16
Frage
A cross section of the cord reveals a core of white matter surrounded by gray matter
Antworten
- True
- False
Frage 17
Frage
neurons, like muscle fibers, conduct impulses according to the all or none response
Antworten
- True
- False
Frage 18
Frage
A nerve impulse would travel faster down a myelinated C fiber
Antworten
- True
- False
Frage 19
Frage
Synaptic conduction of a nerve impulse can be affected by changes is pH
Antworten
- True
- False
Frage 20
Frage
during a neuron's resting state, it is full of Na+ ions
Antworten
- True
- False
Frage 21
Frage
neurons have plasma membranes which contain a variety of ion charges
Antworten
- True
- False
Frage 22
Frage
A neuron will respond maximally to a sub-threshold stimulus
Antworten
- True
- False
Frage 23
Frage
the jejenum is the first part of the small intestine
Antworten
- True
- False
Frage 24
Frage
One part of the stomach is called the cardiac region
Antworten
- True
- False
Frage 25
Frage
Cells that secrete hydrochloric acid are called chief cells
Antworten
- True
- False
Frage 26
Frage
peristalsis acts to move food along the alimentary tube
Antworten
- True
- False
Frage 27
Frage
the starting place for chemical digestion is the stomach
Antworten
- True
- False
Frage 28
Frage
One function of the esophagus is to coat the bolus with mucus
Antworten
- True
- False
Frage 29
Frage
The digestive enzyme pepsin secreted by gastric glands begins the digestion of
Antworten
-
sucrose
-
fat
-
protein
-
carbs
Frage 30
Frage
The main part of the stomach is called the
Antworten
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fundic region
-
pyloric region
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cardiac region
-
none of these
Frage 31
Frage
The salivary enzyme amylase functions to digest
Antworten
-
carbs
-
fats
-
all of these
-
proteins
Frage 32
Frage
The teeth that are best adapted for biting off large pieces of food is called the
Antworten
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incisors
-
cuspids
-
molars
-
bicuspids
Frage 33
Frage
Peristalsis occurs in the digestive tract
Antworten
-
from the pharynx to anus
-
in the stomach and small intestines only
-
in the small and large intestines only
-
in the stomach, small intestine, and large intestines only
Frage 34
Frage
The material that covers the crown of the teeth is
Antworten
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cementum
-
dentin
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enamel
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plaque
Frage 35
Frage
What parts of a tooth are destroyed by dental caries?
Antworten
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Enamel
-
Dentin
-
Pulp
-
Cementum
Frage 36
Frage
The digestive enzyme pepsin secreted by gastric glands begins in the digestion of
Antworten
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carbohydrates
-
protein
-
fats
-
none of these
Frage 37
Frage
Type A hepatitis is transmitted by
Antworten
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Ingestion of food contaminated by feces
-
transfusion with blood contaminated by the hepatitis virus
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use of improperly cleaned needles
-
sexual activity
Frage 38
Frage
The foods that stay in the dtomach for longest are high in
Antworten
-
fats
-
proteins
-
carbs
-
amino acids
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