6660093
Description
Quiz by Nada Medhat, updated more than 1 year ago
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Created by Nada Medhat
over 7 years ago
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Question 1
Question
Regarding sensory receptor properties
Answer
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All receptors respond to a specific quality of a stimulus
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A touch receptor will generate a constant rate of discharge of its axon for as long as the receptor is stimulated.
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The frequency of a train of action potentials in an afferent fibre reflects the intensity of the stimulus given to its receptor
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The first step in sensory transduction is the generation of an action potential
Question 2
Question
Receptors that respond when a stimulus is first applied, but quickly stop responding to continual stimulation, are the
Answer
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phasic receptors
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nocioreceptors
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exteroceptors
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tonic receptors
Question 3
Question
An environmental stimulus acting on the body initially produces an electrical response, called a(n) .................. in the receptor neuron
Answer
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generator potential
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excitatory postsynaptic potential
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action potential
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stimulus potential
Question 4
Question
Alkalosis .......neuronal activity , while acidosis ....... neuronal activity
Answer
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increases , increases
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.increases,decreases
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decreases, increases
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decreases,decreases
Question 5
Question
Synaptic transmission is inhibited by all the following, except
Answer
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oxygen lack
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alkalosis
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acidosis
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prolonged activity of synapse
Question 6
Question
Post-tetanic Potentiation in synapses
Answer
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is due to increased Ca ++ concentration in postsynaptic neurons
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is due to increased Ca ++ influx into presynaptic neurons
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results from slow prolonged stimulation of synapse
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causes fatigue of the synapse
Question 7
Question
Intermittent Claudications evoke
Answer
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visceral pain
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deep pain
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cutaneous hyperalgesia
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colicky pain
Question 8
Question
in hemisection of the spinal cord , all the following are true EXCEPT:-
Answer
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anethesia is found at the level of lesion ipsilaterally
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hyperthesia nay present above the level of lesion on the same side due to irritation of dorsal root
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spastic paralysis and exaggerated muscle reflex is found contralaterally below level of lesion
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all of the above are true
Question 9
Question
when sensory area I of the cerebral cortex is ablated
Answer
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perception of pain is completely abolished
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perception of touch is completely abolished
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there is loss of tactile localization but two point discrimination is spared
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there is loss of tactile localization as well as two point discrimination
Question 10
Question
which of the following NOT produce intracranial headache :-
Answer
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brain tumor
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lumbar puncture
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constipation and alcohol
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otitis media
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