Unit 4 - CNS Quiz

The brain is protected by the hard ​ (a)   , the ​ (b)   tissues which surround it, and the ​ (c)   that it floats in.

• skull
• meninges
• cerebrospinal fluid
• epithelial
• viscous waters

Label the structures indicated by the lines. (5 pts)

a

b

c

d

e

cell body

myelin sheath

axon terminals

nodes of Ranvier

dendrites

Add an arrow to the diagram to show the direction with which a nerve impulse would be passed through this cell. Circle the area that would be considered the input region. Draw a rectangle around the area that would be considered the conducting region. Place a star next to the area that holds the majority of the cell’s organelles. (4 pts)

How would you structurally classify this type of neuron?

• Unipolar

• Bipolar

• Multipolar

• Pseudounipolar

Which labeled structure would form a synapse with another cell?

• Dendrite

• Axon terminal

• Cell body

• Nucleus

Which labeled structure insulates the nerve impulse?

• Axon

• Dendrite

• Myelin Sheath

• Synapse

Match the vocabulary terms with their definition. (1 pt each)

• The Frontal Lobe

• Located behind the ears, this structure is key for language and speech.

• The Parietal Lobe

• This region of the brain is superior to the temporal lobe and plays a role in language processing.

• The Occipital Lobe

• Located on the posterior of the brain, this is critical for posture, balance, and coordinating timing of smooth movements.

• The Temporal Lobe

• This is considered the visual processing center of the brain.

• The Cerebellum

• Located near the forehead, this part of the CNS is essential for memory, motivation, and problem solving.

Match the vocabulary terms with their definition. (1 pt each)

• The Spinal Cord

• Cavity within the brain that contains the choroid plexus.

• Brainstem

• The largest part of the brain that is divided into left and right hemispheres.

• The Limbic System

• Controls our basic emotions, including our mood and instincts.

• Ventricles

• Includes the medulla oblongata, midbrain, and pons.

• The Cerebrum

• The bundle of nervous tissue that conducts signals from the brain to the peripheral nervous system.