Quiz
Study Guide: Nerve Signaling
Este quiz tem tipos de pergunta que abrem no player de sempre.
Perguntas do quiz (55)
1Compared with the inside of the cell, the outside of most cell membranes is
- Apositive
- Bnegative
- Cequal
- Dnone of the above
2The difference in electrical charge across a plasma membrane is called
- Aa. depolarization
- Bb. membrane potential
- Cc. both a and b
- Dd. none of the above
3A neuron's resting membrane potential is
- A70 mV
- B-70 mV
- C30 mV
- D-30 mV
4Which of the following statements is true concerning the sodium-potassium pump?
- AThree sodium ions are pumped out of the neuron for every two potassium ions pumped into the neuron.
- BTwo sodium ions are pumped out of the neuron for every three potassium ions pumped into the neuron.
- CThree sodium ions are pumped out of the neuron for every three chloride ions pumped into the neuron.
- DThree sodium ions are pumped out of the neuron for every three potassium ions pumped into the neuron.
5A membrane that exhibits a membrane potential is said to be polarized.
- AVerdadeiro
- BFalso
6A slight shift away from the resting membrane potential in a specific region of the plasma membrane is often called a stimulus-gated channel.
- AVerdadeiro
- BFalso
7Chlorine ions are the dominant extracellular cations
- AVerdadeiro
- BFalso
8During a relative refractory period
- Aan action potential is impossible
- Ban action potential is possible only in response to a very strong stimuli
- Can action potential is occurring
- Dnone of the above
9Voltage-gated channels are
- Amembrane channels that close during voltage fluctuations
- Bion channels that open in response to voltage fluctuations
- Cmembrane channels that are altered from an extremely high stimulus
- Dnone of the above
10The larger the diameter of a nerve fiber
- Athe slower the speed of conduction
- Bthe faster the speed of conduction
- CFiber diameter does not influence speed of conduction
- Dthe more the speed fluctuates
11Action potential and nerve impulse are synonymous
- AVerdadeiro
- BFalso
12When repolarization has occurred, an impulse can't be conducted
- AVerdadeiro
- BFalso
13The action potential is an all-or-none response
- AVerdadeiro
- BFalso
14Many anesthetics function by inhibiting the opening of sodium channels and thus blocking the initiation and conduction of nerve impulses
- AVerdadeiro
- BFalso
15Which of the following structures is not a main component of a chemical synapse?
- Asynaptic knob
- Bsynaptic cleft
- Csynaptic proces
- Dplasma membrane of postsynaptic neuron
16A synaptic knob is located on the
- Asynaptic cleft
- Baxon
- Cdendrite
- Dcell body
17Which of the following is true of spatial summation?
- ANuerotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
- BSimultaneous stimulation of more than one postsynaptic neuron occurs.
- CImpulses are fired in a rapid succession by the same neuron.
- DSpeed of impulse transmission is increased when several neurotransmitters are released
18In an adult, the nervous system is replete with both electrical synapses and chemical synapses.
- AVerdadeiro
- BFalso
19Rapid-succession stimulation of a postsynaptic neuron by a synaptic knob can have a cumulative effect over time that can result in an action potential.
- AVerdadeiro
- BFalso
20Ca++ ions cause the release of neurotransmitters across the synaptic cleft.
- AVerdadeiro
- BFalso
21Neurotransmitters are released in a synapse and bind to
- Apresynaptic terminals
- Bthe synaptic cleft
- Cthe base of the axon
- Dthe receptors on the postsynaptic terminal
22The main chemical classes of neurotransmitters include all of the following except
- Aacetylcholine
- Bnorepinephrine
- Camino acids
- Damine
23Which of the following is not an example of an amine neurotransmitter?
- Aserotonin
- Bhistamine
- Cglycine
- Ddopamine
24Severe depression can be caused by a deficit in which of the following neurotransmitters?
- Aacetylcholine
- Bamino acids
- Camines
- Dneuropeptides
25Which of the following is not a catecholamine?
- Aepinephrine
- Bnorepinephrine
- Cdopamine
- Dserotonin
26Many biologists now believe that neuropeptides are the most common neurotransmitters in the CNS.
- AVerdadeiro
- BFalso
27Cocaine produces a temporary feeling of well-being by blocking the uptake of dopamine.
- AVerdadeiro
- BFalso
28Neuroscience has advanced to a point at which the neuron doctrine has been expanded to include concepts of the [blank_start]reticular[blank_end] [blank_start]theory[blank_end].
- Areticular
- Btheory
29The concentration of neurotransmitters at synapses in certain neural pathways can affect [blank_start]health[blank_end].
- Ahealth
30[blank_start]Neurotrophins[blank_end] are nerve growth factors that are released by various cells of the body.
- ANeurotrophins
31When more than one presynaptic axon synapses with a single postsynaptic neuron, [blank_start]convergence[blank_end] occurs.
- Aconvergence
32When a single presynaptic axon synapses with many different postsynaptic neurons, [blank_start]divergence[blank_end] occurs.
- Adivergence
33Multiple sclerosis is a myelin disorder.
- AVerdadeiro
- BFalso
34Physical injury, causing nerve damage, can cause local or widespread loss of sensation and/or motor control.
- AVerdadeiro
- BFalso
35Nerve conduction does not occur due to fluctuations in the concentration of ions.
- AVerdadeiro
- BFalso
36Myasthenia gravis is a bacterial disorder.
- AVerdadeiro
- BFalso
37Parkinson disease is a failure to release adequate dopamine at the synapse of certain motor pathways.
- AVerdadeiro
- BFalso
38A synaptic knob is a tiny bulge at the end of the [blank_start]presynaptic[blank_end] neuron's axon.
- Apresynaptic
- Bpostsynaptic
39Acetylcholine is an example of a [blank_start]neurotransmitter[blank_end].
- Aneurotransmitter
- Bprotein molecule receptor
40Neurotransmitters are chemicals that allow neurons to [blank_start]communicate[blank_end] with one another.
- Acommunicate
- Breproduce
41Neurotransmitters are distributed [blank_start]specifically[blank_end] into groups of neurons.
- Aspecifically
- Brandomly
42Endorphins and enkephalins are neurotransmitters that inhibit conduction of [blank_start]pain[blank_end].
- Apain
- Bfear
43A synonym commonly used for action potential is [blank_start]nerve impulse[blank_end].
- Anerve impulse
- Bdepolarization
44In myelinated fibers, action potentials in the membrane occur only at the nodes of Ranvier. This type of impulse conduction is called [blank_start]saltatory conduction[blank_end].
- Asaltatory conduction
- Bpostsynaptic conduction
45A membrane that exhitbits a membrane potential is said to be [blank_start]polarized[blank_end].
- Apolarized
- Bmyelinated
46A wave of electrical fluctuation that travels along the plasma membrane is called a [blank_start]nerve[blank_end] [blank_start]impulse[blank_end].
- Anerve
- Bimpulse
47The membrane potential maintained by a nonconducting neuron's plasma membrane is called the [blank_start]resting[blank_end] [blank_start]membrane[blank_end] [blank_start]potential[blank_end].
- Aresting
- Bmembrane
- Cpotential
48Movement of the membrane potential away from zero (thus below the usual RMP) is called [blank_start]hyperpolarization[blank_end].
- Ahyperpolarization
49Three structures make up a chemical synapse. They are [blank_start]plasma[blank_end] [blank_start]membrane[blank_end] [blank_start]of[blank_end] [blank_start]a[blank_end] [blank_start]postsynaptic[blank_end] [blank_start]neuron[blank_end], [blank_start]synaptic[blank_end] [blank_start]know[blank_end] and the [blank_start]synaptic[blank_end] [blank_start]cleft.[blank_end]
- Aplasma
- Bmembrane
- Cof
- Da
- Epostsynaptic
- Fneuron
- Gsynaptic
- Hknob
- Isynaptic
- Jcleft.
50Long-term memories (months or years) require [blank_start]structural[blank_end] changes in the synapse, such as more vesicles or more vesicle release sites.
- Astructural
51The unique neurotransmitter that combines acetate with choline is acetylcholine. It is deactivated by [blank_start]acetylcholinesterase[blank_end].
- Aacetylcholinesterase
52An example of a catecholamine is [blank_start]dopamine[blank_end].
- Adopamine
53Two major function classifications of neurotransmitters are excitatory neurotransmitters and [blank_start]inhibitory[blank_end] [blank_start]neurotransmitters[blank_end].
- Ainhibitory
- Bneurotransmitters
54The function of a neurotransmitter is determined by the postsynaptic receptor.
- AVerdadeiro
- BFalso
55Nuetotrophins stimulate neuron development but also can act as neurotransmitters or neuromodulators.
- AVerdadeiro
- BFalso
Informações
- Descrição
- Study Guide: Nerve Signaling
- Autor
- Alexandra Bozan
- Idioma
- English
- Visualizações
- 24
- Etiquetas
- Avaliação
- Ainda sem avaliações Avalie este quiz