Neco 2025 Biology Question 19
Practice objective / multiple choice question 19 from the 2025 Neco Biology examination.
A tap on the patellar tendon produces a measurable latency of \(30\) ms between the tap and the onset of the quadriceps EMG signal. The afferent sensory pathway from the tap site to the spinal cord is \(0.5\) m long with a conduction velocity of \(55\) m s\(^{-1}\). The efferent motor pathway from the spinal cord to the quadriceps muscle is \(0.4\) m long with a conduction velocity of \(45\) m s\(^{-1}\). Assume a synaptic delay of \(0.5\) ms at the spinal interneuron. Calculate the total physiological time from tap to muscle contraction (including the EMG onset latency) and state how many milliseconds the measured latency exceeds this calculated time.
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About This Question
This is Neco 2025 Biology Question 19. It is one of the objective questions from the 2025 Neco Biology examination.
Difficulty level: Medium .
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