Ijmb Model Questions Vol1 2017 Biology Question 8

Practice essay / theory question 8 from the 2017 Ijmb Model Questions Vol1 Biology examination. This question covers Coordination, Reflex arc, Sensory receptors, Motor neurons, Synaptic transmission, Neural pathways .

Ijmb Model Questions Vol1 2017 Biology Essay / Theory

Topics: Coordination Reflex arc Sensory receptors Motor neurons Synaptic transmission Neural pathways

Question 8 IJMB_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay

The patellar (knee‑jerk) reflex is a classic monosynaptic reflex that exemplifies the coordination of the nervous system. Answer the following questions.

Question Parts

( a )

Describe, in order, the anatomical structures and events that occur from the moment the patellar tendon is tapped to the contraction of the quadriceps muscle.

( b )

Explain why the latency of this reflex is shorter than that of a comparable voluntary movement.

( c )

A researcher records a reflex latency of 45 ms in a healthy adult. Discuss two physiological or experimental factors that could cause this latency to vary.

( d )

Predict the effect on the patellar reflex if the dorsal root ganglion supplying the sensory afferent is damaged, and justify your answer.

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About This Question

This is Ijmb Model Questions Vol1 2017 Biology Question 8. It is one of the essay questions from the 2017 Ijmb Model Questions Vol1 Biology examination.

The question covers Coordination, Reflex arc, Sensory receptors, Motor neurons, Synaptic transmission, Neural pathways .

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