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Neurophys Final
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Preguntas del test (38)
1Caffeine exposure led to a ______ in JPs.
(Depressing Effects of Caffeine at Crayfish Neuromuscular Synapses: I. Dosage Dependent Response and Ca2+ Gradient Effects)- ADecrease
- BIncrease
- CNo change
- DEnd
2For the 50 mM caffeine solution in the experiment with the different Ringer solutions, All JP ______ were _____.
(Depressing Effects of Caffeine at Crayfish Neuromuscular Synapses: I. Dosage Dependent Response and Ca2+ Gradient Effects)- AIncreased, insignificant
- BIncreased, significant
- CDecreased, insignificant
- DDecreased, significant
3Multiple exposures to caffeine repeatedly depressed JP sizes and what occurred to the effectiveness?
- ARemained the same
- BDecreased
- CIncreased
- DDisappeared
4What was the tension overshoot influenced by?
- ASaline
- BRate of Stretching
- CThe lead attached to the nerve
- DReceptor adaptation
5The firing rate _____ when subjected to an increase in tension.
- ARemained the same
- BDecreased
- CHalted
- DIncreased
6Why does the fast adapting receptor require a greater degree of stretch to produce a given change in tension per unit area?
- AIt has a higher coefficient of elasticity
- BIt adapts more quickly
- CIt has a lower coefficient of elasticity
- DIt has a smaller cross section
7What kind of stimulation is used in order to stimulate the vagal nerve of rabbit heart?
- AChemical
- BElectrical
- CIonic
- DMechanical
8What is another word for the Langendoroff Heart?
- AIsolated Perfused Heart
- BFrequency of heartbeat
- CModel Heart
9The rate onset and magnitude of potentiation of sub maximal stimulation is _____ than that of maximal stimulation when ouabain is applied
- ALess than
- BEqual to
- CMore than
- DOpposite
10What is Ouabain considered in scientific terminology?
- ACardiac potentiator
- BNasal decongestant
- CCardiac glycoside
11What were the two situations in which the Ca2+ on the outside was lowered in the study of inhibitors of the sodium pump and spontaneous release of transmitter from motor nerve terminals of frog?
- ACalcium-free Ringer and calcium chelators
- BPotassium-free Ringer and calcium chelators
- CPotassium-free Ringer and Ouabain
- DCalcium-free Ringer and Ouabain
12Ca influx is highly dependent on the concentration of ______________.
- AIntracellular Na+
- BIntracellular K+
- CExtracellular K+
- DExtracellular Na+
13What is a huge factor when working with Ouabain?
- ATemperature
- BTime
- CCation Concentration
- DSunlight Exposure
14K+ channels can be blocked with _____
- ATTX
- BTEA
- CTEA and 4-AP
- DScVLq
15In the slow adapting neuron of the crayfish stretch receptor, increasing the current amplitude caused impulse response to _________ and decreasing amplitude caused ___________ of the impulse response.
- Aincrease; restoration
- Bcease; elimination
- Cincrease; elimination
- Dcease; restoration
16Na+ channel inactivation in the rapidly adapting neuron (of the crayfish stretch receptor) occurs at more ________ potentials and a ________ rate than in the slowly adapting neuron.
- Anegative; slower
- Bnegative; faster
- Cpositive; faster
- Dpositive; slower
17What was the average latency for interaction between crayfish and dragonflies in study on escape circuit activation during predator-prey interactions?
- A10 minutes
- B1 minute
- C3 minutes
- D1 hour
18Which is the least effective escape circuit for a crayfish during the first attack of a predator?
- ANon-giant circuit
- BMedial giant circuit
- CLateral giant circuit
- DFlexor giant circuit
19Which escape circuit in the crayfish produces a fast, straight and backwards jump?
- ANon-giant circuit
- BMedial giant circuit
- CLateral giant circuit
- DFlexor giant circuit
20What were thought to cause the excitation in fast flexor motor neurons of the crayfish?
- ADorsal cord axons
- BVentral cord axons
- CRostral cord axons
- DDistal cord axons
21During fast flexor bursts, giant neurons were silent in the sense that they did not fire. However, they did receive inhibitory input. Where from?
- AFast extensors
- BExtensor inhibitors
- CFast flexors
- DFlexor inhibitor
22In the acute vs. chronic response figure (Figure 2), what did the insets represent?
- AAverage giant-mediated impulse
- BSingle giant-mediated impulse
- CAverage non-giant mediated impulse
- DSingle non-giant-mediated impulse
23Which of the following is not a function of the crayfish caudal photoreceptor?
- ALight reception
- BSecondary interneuron
- CCircadian pacemaker
- DMechanoreception
24The soma of the crayfish caudal photoreceptor is located where?
- AThird ganglion
- BThoracic ganglion
- CSixth ganglion
- DMedial tailfins
25Which duration of light stimulus produced the highest temperature coefficients in frequency and latency of crayfish photoreceptor firing?
- ABrief duration stimulus (.5 sec)
- BMedium duration stimulus (2 sec)
- CLong duration stimulus (8 sec)
26_____________ is a drug that activates acetylcholine receptors
- ANeostigmine
- BCarbachol
- CTEA
- DTubocurarine
27After the addition of TEA and gallamine, end plate potentials at frog NMJ were _____________ compared to tubocurarine
- AShorter in duration
- BThe same duration
- CLonger in duration
- DIndistinguishable
28Intracellular recordings were taken from the ___________ and ____________ muscles of the frog in the study of the effects of Gallamine and TEA on endplate potentials
- AExtensor longus digit I and Sartorius
- BFlexor longus digiti IV and Sartorius
- CExtensor longus digiti IV and Femorus
- DExtensor longus digiti IV and Sartorius
29What is a stepwise change in light stimulation?
- ANo change followed by one large jump in intensity
- BIncreasing or decreasing of intensity in small equal steps
- CGradually increasing the intensity over time at a steady rate
- DChanging the intensity from high to low repeatedly
30Which of the following was not found to be a significant finding in the steady state afferent firing patterns from the crayfish caudal photoreceptor?
- AO. clarkia showed less mutation sensitivity than O. virillus
- BDark steady state was found to have similar firing patterns to the resting state
- CIntervals between pairings in the dark steady state were found to mimic the absolute refractory period
- DSteady state light produced higher frequency, but more random firing patterns
31Where are the crayfish caudal photoreceptors located?
- AThe retina
- BThe 6th dorsal root ganglia
- CThe front most dorsal root ganglia
- DThe swimmerets
32Which of these is not true about TEA?
- ATEA acts as a binding receptor on the extracellular side of the nodal membrane
- BTEA does not reduce the amplitude of potassium currents
- CThe change in peak current voltage relation is dependent on concentrations of TEA
- DTEA ions act to excite or block synaptic activity
33Which of these agents does not affect the sodium current?
- ATTX
- BXylocaine
- CTEA
- DCalcium
34Which equation is potassium steady-state current and time constant derived from?
- ANernst equation
- BGoldman equation
- CHodgkin-Huxley equations
35What type of computer analysis was used in the study of selective inhibition of delayed potassium currents in nerve by TEA?
- AComputer assisted/aided qualitative data analysis software
- BThe Ethnograph
- CNVIVO qualitative analysis software
- DFortran program
36What is a looming stimuli?
- AFlash of light
- BLight spot moving in frontal-parallel plane
- CApproaching target
- DReceding target
37The nucleus rotunda in the bird is homologous with the mammalian _____
- ASuperior colliculus
- BVisual cortex
- CPulvinar
- DLGN
38Zone of the nucleus rotundus that selectively responds to motion-in-depth
- ADorsal-anterior
- BAnterior-central
- CVentral
- DDorsal-posterior
Información
- Descripción
- Test sobre Neurophys Final, creado por mannj el 13/05/2014.
- Autor
- mannj
- Idioma
- English
- Visitas
- 16
- Valoración
- Aún sin valoraciones Valora este test