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The shortest reflex time is recorded with :-
a- a flexor withdrawal reflex
b-an inverse stretch reflex
c- a stretch reflex
d- a scratch reflex
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- In the simplest kind of reflex______, directly signal ________, which act on muscle cells. a. sensory neurons; interneurons b. interneurons; motor neurons c. sensory neurons; motor neurons d. motor neurons; sensory neuronsNeurons in Thecontrol motor reflexes. thalamus spinal cord parietal lobe hippocampusStretch reflex is characterized by the following except :-a- disynaptic reflexb- high localizationc- shows reciprocal innervations.d- it is of graded response
- After-discharge of reflex responses :-a- increase the magnitude of the reflex responsesb- delays the onset of fatigue of reflex responsesc- involves interneuron circuitsd- depends upon spatial summationThe withdrawal reflex is a monosynaptic reflex arc.True ORFalseFlexor reflexes do not involve :-a- flexor musclesb- extensor musclesc- reciprocal inhibitiond- reflex spasm of the involved muscles
- Reflex output is initiated by an input stimulus and result in an output response. Reflex activity ranges from simple to complex. In a table format, list the different types of reflex and how to assess these functions.Central delay of reflex actions :-a- is due to presence of inhibitory interneurons in the reflex pathwayb- is the time between stimulation of receptors and response of the effector musclec- is longer in the flexor reflex than in the stretch reflexd- is determined by the velocity of conduction of impulses along the afferent and efferent neurons in the reflex pathwayFill in the blank: A knee-jerk reflex employs only _______________________ and motor neurons.
- Descartes' version of the reflex arc was important for understanding the brain's role in sensation, perception and reactivity. Which feature of Descartes' reflex arc is comparable to neurotransmission through motor, inter, and sensory neurons in the present day reflex circuit? A) body activity B) External stimulus C) Valvules Opening D) Nerve stimulationA flexor withdrawal reflex shows all the following properties, except :-a- recruitmentb- prepotent c- non-fatigable d- irradiationTendon jerks are clinically examined to asses :-a- integrity of muscle spindlesb- integrity of reflex pathwayc- the total reflex time of the jerkd- central delay time of the jerk
