When you are exposed to bright light, a reflex is initiated and your iris constricts to decrease pupil size.  Which structure serves as a receptor in this system?

There are two types of synapses, based on mode of communication. What are they?

The blood-brain barrier is made up of

Which is the correct order of the connective tissue layers of a skeletal muscle, beginning with the most superficial? a: Endomysium b: Epimysium c: Perimysium

The portion of the nervous system that conducts impulses from the skin, joints, skeletal muscles, and special senses is the ___________ division.

Which type of protein is used by cells of the immune system to distinguish normal cells from foreign or infected cells?

The break of a bone that has been weakened by disease is a ________fracture; when a broken end of the bone pierces the skin, the fracture is ________.

Where are synaptic knobs located?

In cross section, the outermost portion of the cerebellum is composed of

The function of the nucleolus is to make