WAEC Biology 2018 Objective — Question 16
Question 16 of 50 from the West African Examinations Council (WAEC) Biology 2018 Objective paper, with the correct answer and a full explanation.
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Which of the following statements about the response of neurons to stimulus is correct?
- A. Neurons respond to stimulus of any strength
- B. Neurons respond to all stimuli applied in rapid succession
- C. Neurons respond more rapidly during the absolute refraction period
- D. Intensity of stimulus must reach a threshold value before the neurons can be excitedCorrect
Explanation
This follows the 'all-or-none' law: a stimulus must reach a threshold intensity before a neuron will fire.
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