Chapter 8: Ion Channels

In sensory cells, the membrane potential changes in response tominute physical stimuli: Receptors in the eye respond to a single photon of light; olfactory neurons detect asingle molecule of odorant; and hair cells in the inner ear respond to tiny movements of atomic dimensions. These sensory responses ultimately lead to the firing of an action potential during which the membrane potential changes at up to 500 volts per second.
真是不可思议。