Nervous System

What two components make up the central nervous system (CNS)?

• spinal cord and facial nerves

• nerves in the limbs and the brain

• brain and spinal cord

• nerves in the limbs and those around the organs

These neurons transmit information from the sensory receptors to the CNS.

• sensory neurons (afferent)

• interneurons (association)

• motor neurons (efferent)

These neurons transmit information from the CNS to the effector muscle or gland.

• sensory neurons (afferent)

• interneurons (association)

• motor neurons (efferent)

Put the following parts of the reflex arc in the correct order:

1. motor neuron (efferent)

2. receptor

3. effector

4. sensory neuron (afferent)

5. interneuron

The part of the neuron that contains the nucleus of the cell is the

• dendrite

• cell body

• axon

• myelin sheath

The part of the neuron that conducts the action potential away from the cell body is the

• neurilemma

• dendrite

• axon terminal

• axon

The part of the neuron that receives information from other neurons or from the sensory receptors.

• synapse

• axon terminal

• dendrite

• Schwann cell

The part of the neuron that insulates the axon in order to ensure a "faster" action potential.

• myelin sheath

• Schwann cell

• Node of Ranvier

• axon

What does the letter F represent?

• axon

• Schwann cell

• Node of Ranvier

• myelin sheath

What does the letter A represent?

• nucleus

• cell body

• dendrite

• axon terminal