Neco 2018 Biology Question 8

Practice essay / theory question 8 from the 2018 Neco Biology examination. This question covers coordination, nervous system, reflex arc .

Neco 2018 Biology Essay / Theory

Topics: coordination nervous system reflex arc

Question 8 NECO • 2018 • BIOLOGY • essay

The diagram illustrates the neural pathway of the knee‑jerk (patellar) reflex, showing numbered components from the muscle spindle receptor to the quadriceps muscle.

( a )

Describe, in order, the sequence of events that occur from the moment the muscle spindle is stretched to the contraction of the quadriceps muscle.

( b )

Explain the functional significance of the interneuron (component 5) in this reflex pathway.

( c )

Why is the knee‑jerk reflex faster than a voluntary movement that involves the same muscles? Use the diagram to support your answer.

( d )

Predict the effect on the reflex if the dorsal root ganglion (component 3) were damaged, and justify your prediction.

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This is Neco 2018 Biology Question 8. It is one of the essay questions from the 2018 Neco Biology examination.

The question covers coordination, nervous system, reflex arc .

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