Sensory Systems curves

1 curve · untimed · read the graph, then answer the questions on it.

Tonic vs phasic receptorsCurve 1 of 1 · Q 1/4

Firing of two skin mechanoreceptors while the same steady pressure is applied and later removed (the dashed step at the bottom marks the stimulus). The upper trace is one receptor, the lower trace another.

↑ Firing rate (each trace) · → Time (stimulus on → off)

The upper receptor is still firing at point A, long after the pressure began. Which receptor behaves this way?

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