The iris is a continuation of which of these structures?

The outer surface of the axon has a positive charge at resting membrane potential. True or false?

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

There are three types of synapses.

The cerebral cortex is known as grey matter. True or false?

The neural system of lower invertebrates is better than the insects.

To which of these structures does the external auditory meatus extend up to?

Scotopic vision is a function of cone cells. True or false?