Nervous system exam

There are ________ pairs of spinal nerves that originate from the spinal cord.

• 3
• 13
• 31
• 33

Interneurons, also known as ________ neurons, are housed entirely within the central nervous system.

• associative
• interactive
• reactive
• active

A nerve fiber is a ________ elongated process, usually an axon or a peripheral process.

• single
• double
• triple
• quadruple

Damage to nerve cells without myelin sheaths is permanent, because regeneration of nerve cells can only happen when ________ cells are present.

• Chwann
• Schann
• Swan
• Schwann

A nerve is a bundled unit of nerve fibers located ________ the brain and spinal cord, connecting various parts of the body.

• alongside
• inside
• outside
• distant from

Receptors are typically ________ specific (pain, heat, cold, sharp), and they react by initiating a chemical change, or impulse.

• junction
• color
• length
• function

A synapse is ________-shaped

• pear
• root
• knob
• oval

Both the brain and the spinal cord are divided into gray matter and ________ matter.

• yellow
• white
• red
• green

Which of the following is NOT one of the three types of neuron?

• motor
• sensory
• inter
• outer

Motor neurons are called ________, meaning they transmit messages away from the cell body to the muscles and organs.

• defiant
• effective
• efferent
• defective