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Sensory Receptors

Sensory receptors are usually found in sense organs such as the skin, ear and eye. They are called transducers as they convert stimuli of various kinds into an electrical impulse called a generator potential.All sensory receptors are specific to only one type of stimulus. The four main types are:
  • mechanoreceptors
  • chemoreceptors
  • thermoreceptors
  • photoreceptors

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Specification: OCR Biology A (H420), A-level, 5.1.3 Neuronal communication. Topic: Neuronal Communication.

Key terms in this lesson

Myofibril
A long, cylindrical organelle within a muscle fibre made up of repeating sarcomeres and responsible for muscle contraction.
Actin
A thin protein filament in a myofibril that, together with myosin, slides during muscle contraction.
Myosin
A thick protein filament in a myofibril with globular heads that bind to actin and pull it during muscle contraction.

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All 38 lessons in Neuronal Communication · All OCR A-level Biology topics