Neco Model Questions Vol1 2018 Biology Question 2
Practice objective / multiple choice question 2 from the 2018 Neco Model Questions Vol1 Biology examination.
In a reflex pathway a sensory neuron conducts an impulse over \(0.40\ \text{m}\) at \(80\ \text{m s}^{-1}\), an interneuron over \(0.20\ \text{m}\) at \(60\ \text{m s}^{-1}\), and a motor neuron over \(0.50\ \text{m}\) at \(70\ \text{m s}^{-1}\). Each synapse introduces a delay of \(0.5\ \text{ms}\). The adrenal medulla releases epinephrine that reaches its target tissue through the bloodstream travelling \(2.0\ \text{m}\) at \(0.5\ \text{m s}^{-1}\). (i) Calculate the total time from stimulus to muscle contraction via the neural reflex. (ii) Calculate the time for the hormonal response to reach the target tissue. (iii) Which response is faster and by how many milliseconds?
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This is Neco Model Questions Vol1 2018 Biology Question 2. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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