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EnglandBiologyQuick questions
3.6 Organisms respond to changes in their internal and external environments
Quick questions on Receptors: the Pacinian corpuscle, rods and cones - AQA A-Level Biology
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the Pacinian corpuscle?Show answer
The Pacinian corpuscle is a receptor in the skin (and joints and tendons) that responds to changes in mechanical pressure. It is the ending of a single sensory neurone surrounded by concentric layers (lamellae) of connective tissue separated by gel.
What is q1?Show answer
Explain how a Pacinian corpuscle produces a generator potential when pressure is applied. [3 marks]
What is q2?Show answer
Compare rod and cone cells with respect to sensitivity and the type of vision they provide. [3 marks]
What is q3?Show answer
Explain why visual acuity is greater in the fovea than in the peripheral retina. [3 marks]
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