Quiz
synapse and sensory system
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Perguntas do quiz (10)
1Regarding sensory receptor properties
- AAll receptors respond to a specific quality of a stimulus
- BA touch receptor will generate a constant rate of discharge of its axon for as long as the receptor is stimulated.
- CThe frequency of a train of action potentials in an afferent fibre reflects the intensity of the stimulus given to its receptor
- DThe first step in sensory transduction is the generation of an action potential
2Receptors that respond when a stimulus is first applied, but quickly stop responding to continual stimulation, are the
- Aphasic receptors
- Bnocioreceptors
- Cexteroceptors
- Dtonic receptors
3An environmental stimulus acting on the body initially produces an electrical response, called a(n) .................. in the receptor neuron
- Agenerator potential
- Bexcitatory postsynaptic potential
- Caction potential
- Dstimulus potential
4Alkalosis .......neuronal activity , while acidosis ....... neuronal activity
- Aincreases , increases
- B.increases,decreases
- Cdecreases, increases
- Ddecreases,decreases
5Synaptic transmission is inhibited by all the following, except
- Aoxygen lack
- Balkalosis
- Cacidosis
- Dprolonged activity of synapse
6Post-tetanic Potentiation in synapses
- Ais due to increased Ca ++ concentration in postsynaptic neurons
- Bis due to increased Ca ++ influx into presynaptic neurons
- Cresults from slow prolonged stimulation of synapse
- Dcauses fatigue of the synapse
7Intermittent Claudications evoke
- Avisceral pain
- Bdeep pain
- Ccutaneous hyperalgesia
- Dcolicky pain
8in hemisection of the spinal cord , all the following are true EXCEPT:-
- Aanethesia is found at the level of lesion ipsilaterally
- Bhyperthesia nay present above the level of lesion on the same side due to irritation of dorsal root
- Cspastic paralysis and exaggerated muscle reflex is found contralaterally below level of lesion
- Dall of the above are true
9when sensory area I of the cerebral cortex is ablated
- Aperception of pain is completely abolished
- Bperception of touch is completely abolished
- Cthere is loss of tactile localization but two point discrimination is spared
- Dthere is loss of tactile localization as well as two point discrimination
10which of the following NOT produce intracranial headache :-
- Abrain tumor
- Blumbar puncture
- Cconstipation and alcohol
- Dotitis media
Informações
- Descrição
- medicate and innovate for services the medical student group
- Autor
- Nada Medhat
- Idioma
- English
- Visualizações
- 79
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