5342281
Descrição
Quiz por Sina Moglestue, atualizado more than 1 year ago
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Criado por Sina Moglestue
quase 8 anos atrás
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Questão 1
Questão
In a polarized neuron at rest, which ion is concentrated outside the cell?
Responda
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Na+
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Ca++
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None of the above
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K+
Questão 2
Questão
The period of time in which the neuron cannot generate another action potential is called the
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all or none period
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refractory period
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latent period
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sublimial period
Questão 3
Questão
A typical resting membrane potential is
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+30 mv
-
0 mv
-
-70 mv
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+100 mv
Questão 4
Questão
Impulses are conducted from one neuron to another across a
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Ganglion
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synapse
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neurofibral node
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neuroeffector junction
Questão 5
Questão
Which of the following is true about synapses?
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Neurotransmitters are released by the dendrites at synapses
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information jumps synapses in the form of electric arcs
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neurotransmitters are released in the form of Na and K vesicles
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information passes in only one direction across synapses
Questão 6
Questão
Which of the following best describes the transmission of an impulse along a neuron?
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the movement of a neurotransmitter along a neuronal membrane
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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
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positive charges spreading over the surface of an excitable cell
Questão 7
Questão
Which of the following is released by a presynaptic neuron to generate an impulse in the postsynaptic neuron?
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an electric spark
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integrators
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neurotransmitters
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packets of sodium and potassium
Questão 8
Questão
The thalamus and hypothalamus are parts of the brain located in the
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Diencephalon
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Pons
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Medulla oblongata
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Midbrain
Questão 9
Questão
the ability of neurons to respond to stimuli and convert them to impulse is called
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excitability
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faciliation
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summation
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depolarization
Questão 10
Questão
the type of neuroglial cell found between neurons and blood vessels that join parts by numerous cellular processes are
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astrocytes
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ependymal cells
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oligodendrocytes
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microglial cells
Questão 11
Questão
emotions of fear, anger, and pleasure are produced by the
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pons
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cerebellum
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limbic system
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medulla oblongata
Questão 12
Questão
which of the following is not a structural feature of a neuron?
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neurolemma
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synapse
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missl granules
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axon
Questão 13
Questão
the job of maintaining homeostasis is a function of the ___ and ___ systems
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nervous...endocrine
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nervous...digestive
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endocrine...digestive
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urinary...digestive
Questão 14
Questão
if a neuron within the CNS has its axon severed,
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the neuron will be spurred to reproduce a fully functional one
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the neuron will lose its funstion
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the neuron will most likely die
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it will soon regenerate
Questão 15
Questão
It can be said that in a resting neuron, the
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inside of the cell is more electropositive than the outside
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concentration of K+ ions is greater outside the cell
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membrane is polarized
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all of the above
Questão 16
Questão
A cross section of the cord reveals a core of white matter surrounded by gray matter
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- True
- False
Questão 17
Questão
neurons, like muscle fibers, conduct impulses according to the all or none response
Responda
- True
- False
Questão 18
Questão
A nerve impulse would travel faster down a myelinated C fiber
Responda
- True
- False
Questão 19
Questão
Synaptic conduction of a nerve impulse can be affected by changes is pH
Responda
- True
- False
Questão 20
Questão
during a neuron's resting state, it is full of Na+ ions
Responda
- True
- False
Questão 21
Questão
neurons have plasma membranes which contain a variety of ion charges
Responda
- True
- False
Questão 22
Questão
A neuron will respond maximally to a sub-threshold stimulus
Responda
- True
- False
Questão 23
Questão
the jejenum is the first part of the small intestine
Responda
- True
- False
Questão 24
Questão
One part of the stomach is called the cardiac region
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- True
- False
Questão 25
Questão
Cells that secrete hydrochloric acid are called chief cells
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- True
- False
Questão 26
Questão
peristalsis acts to move food along the alimentary tube
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- True
- False
Questão 27
Questão
the starting place for chemical digestion is the stomach
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- True
- False
Questão 28
Questão
One function of the esophagus is to coat the bolus with mucus
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- True
- False
Questão 29
Questão
The digestive enzyme pepsin secreted by gastric glands begins the digestion of
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sucrose
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fat
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protein
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carbs
Questão 30
Questão
The main part of the stomach is called the
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fundic region
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pyloric region
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cardiac region
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none of these
Questão 31
Questão
The salivary enzyme amylase functions to digest
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carbs
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fats
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all of these
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proteins
Questão 32
Questão
The teeth that are best adapted for biting off large pieces of food is called the
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incisors
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cuspids
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molars
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bicuspids
Questão 33
Questão
Peristalsis occurs in the digestive tract
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from the pharynx to anus
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in the stomach and small intestines only
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in the small and large intestines only
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in the stomach, small intestine, and large intestines only
Questão 34
Questão
The material that covers the crown of the teeth is
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cementum
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dentin
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enamel
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plaque
Questão 35
Questão
What parts of a tooth are destroyed by dental caries?
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Enamel
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Dentin
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Pulp
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Cementum
Questão 36
Questão
The digestive enzyme pepsin secreted by gastric glands begins in the digestion of
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carbohydrates
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protein
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fats
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none of these
Questão 37
Questão
Type A hepatitis is transmitted by
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Ingestion of food contaminated by feces
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transfusion with blood contaminated by the hepatitis virus
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use of improperly cleaned needles
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sexual activity
Questão 38
Questão
The foods that stay in the dtomach for longest are high in
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fats
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proteins
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carbs
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amino acids
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