A scientist observes a particular nerve fiber that is among the fastest at conducting action potentials in the body. Which of the following best describes its likely structure?

Disease is often considered the result of

Which of the following is considered a required enzyme for the process of transcription?

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 connective tissue wrapping that surrounds bundles (fascicles) of axons is the

Our calf muscles contract to cause plantar flexion, resembling the lever system of a wheelbarrow. Therefore, it is a _______ -class lever.

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

Noncompetitive inhibition of an enzyme occurs when the inhibitor binds to the

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