What is present at the base of the bony canals?

Nerve impulses are transmitted from one neuron to another via which of these?

Identify the structure shown in the diagram.

How many types of photoreceptor cells are present in the retina?

To which of these colors are the cone cells of the eye unresponsive?

What is retinal?

Which of these do not make up the tympanic membrane?

Which of the following is not a function of sensory organs?