Sensory structures — A/L Biology

How do I practise Sensory structures?

1 question with a worked solution

1. Which sensory receptors in human skin are encapsulated mechanoreceptors specialized for detecting deep pressure and high-frequency vibrations?
   1. A) Meissner's corpuscles (tactile corpuscles)
   2. B) Pacinian corpuscles (lamellar corpuscles)
   3. C) Free nerve endings
   4. D) Merkel discs
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   Correct answer: B) Pacinian corpuscles (lamellar corpuscles)

   Pacinian corpuscles consist of concentric layers of connective tissue surrounding a central dendrite, located deep in the dermis and hypodermis, sensitive to deep pressure and rapid vibration.

   Show worked solution

   Step 1: Match cutaneous receptors to stimuli: - Meissner's: light touch and low-frequency vibration in dermal papillae. - Merkel discs: sustained light touch and texture. - Free nerve endings: pain and temperature (nociception/thermoception). - Pacinian corpuscles: deep pressure and transient vibration. Answer: Pacinian corpuscles (lamellar corpuscles).
   Modelled on: the A/L Biology examination pattern

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Where does Sensory structures fit in the syllabus?

Year 2 · Term 1