A sensory receptor that detects blood pH would be a

The clear dome on the front of the eye is best called

The control of blood pressure and heart rate comes from the

The gray matter of the cerebrum is called

The spinal cord is protected by the vertebra.

Sensory adaptation is

The organ of Corti is found within the 

In the spinal cord the ascending tract

The cavities of the brain are best called

The ion that enters the tip of the axon and triggers the release of the neurotransmitter is