Question

a receptor that contains mechanically - gated ion channels would function best as a
tactile receptor.
light receptor.
chemoreceptor.
thermoreceptor.
photoceptor.

Explanation:

Mechanically - gated ion channels respond to physical deformation or pressure. Tactile receptors are involved in the sense of touch, which is a mechanical stimulus. Light receptors (photoreceptors) respond to light, chemoreceptors to chemical substances, thermoreceptors to temperature changes. Since the question is about a receptor with mechanically - gated ion channels (related to mechanical stimuli like touch), tactile receptor is the correct choice.

Answer:

tactile receptor.