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Pacinian Corpuscles

Pacinian corpuscles are located deep within the skin and detect mechanical pressure. Most are found in the fingers and soles of the feet but some are also found within your joints.They are formed from layers of connective tissue separated by a viscous gel. The tip of the sensory neurone is surrounded by the layers of connective tissue in the middle of the Pacinian corpuscle and its membrane can be stretched by pressure applied to the Pacinian corpuscle.

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

Key terms in this lesson

Action potential
The temporary reversal of the electrical charge across an axon membrane, from about -70mV to +40mV, that occurs when a neurone is stimulated above threshold.
Depolarisation
A change in the potential difference across a membrane that makes the inside less negative, caused by an influx of sodium ions.
Acetylcholine
A neurotransmitter released at cholinergic synapses and neuromuscular junctions that causes depolarisation of the postsynaptic membrane.
Sarcolemma
The specialised cell surface membrane of a muscle fibre.

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