What are the chemical messengers/substances that nerves use to communicate, across a synaptic cleft, to another nerve or cell?

Which structure is responsible for maintaining the resting state, or polarization, of a neuron?

Food in a semiliquid state that leaves the stomach and enters the duodenum is called

Homeostasis, the balance of nutrients and fluids in the body, depends on ____ sensations.

The blind spot of the eye is the

Which white blood cell is called a macrophage when it leaves the cardiovascular system and enters tissues?

Which of the following statements about hearing is true?

The body of the tongue is made up of mostly

What is the name of the structure that returns lymph to the bloodstream (cardiovascular system)?

The sensory organs and structures associated with the special senses are all located in the