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When muscle fibres are stimulated, the muscle contracts - VCE - SSCE Biology - Question 19 - 2011 - Paper 1
Question 19
When muscle fibres are stimulated, the muscle contracts. The gentle tapping of a tendon stimulates stretch receptors. The response to this stimulation is a "knee jer... show full transcript
Worked Solution & Example Answer:When muscle fibres are stimulated, the muscle contracts - VCE - SSCE Biology - Question 19 - 2011 - Paper 1
Step 1
B. injury to neuron K is unlikely to affect the knee jerk response.
Answer
Neuron K plays a crucial role in transmitting the signal from the stretch receptor to the spinal cord and ultimately to the motor neuron responsible for muscle contraction in the knee jerk reflex. However, if neuron K were to be injured, the alternative pathways or compensatory mechanisms within the nervous system might still enable the reflex action to occur. Thus, one can reasonably conclude that such an injury would not significantly impair the knee jerk response.