12. The Central Nervous System

Mark the following statements about the brain as true or false. If a statement is false, correct it to make a true statement.

Humans use only 10% of their brains.

Mark the following statements about the brain as true or false. If a statement is false, correct it to make a true statement.

The four main components of the brain are the cerebrum, the diencephalon, the cerebellum, and the brainstem.

Mark the following statements about the brain as true or false. If a statement is false, correct it to make a true statement.

The right and left lateral ventricles are the largest of the ventricles in the brain and are located in the diencephalon.

What structure forms cerebrospinal fluid? How does this occur?

Explain the importance of the blood brain barrier, and list the structures that form it.

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.

The spinal cord functions as a relay and processing station.

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.

The spinal cord extends from the foramen magnum to the level between the first and second lumbar vertebrae.

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.

The epidural space around the spinal cord is only a potential space.

Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.

The posterior horn of spinal gray matter contains the cell bodies of motor neurons.

Mark the following statements on the role of the brain in movement as true or false. If a statement is false, correct it to make a true statement. 

The dopaminergic neurons of the substantia nigra enhance the actions of the caudate nucleus and putamen.

Mark the following statements on the role of the brain in movement as true or false. If a statement is false, correct it to make a true statement. 

The cerebellum monitors the initiation of movement but does not monitor ongoing movements. 

Mark the following statements on the role of the brain in movement as true or false. If a statement is false, correct it to make a true statement. 

The basal nuclei inhibit inappropriate movements and are required for the initiation of movement. 

Mark the following statements on the role of the brain in movement as true or false. If a statement is false, correct it to make a true statement. 

The correction of motor error by the cerebellum can occur over the long term by motor learning.

The two components of the CNS that are responsible for maintenance of homeostasis are the ________ and the ________. 

Which of the following statements is false? 

a. The suprachiasmatic nucleus is often called the body's 'master clock.' 

b. Melatonin and the ventrolateral preoptic nucleus increase the activity of the reticular formation. 

c. A decrease in the activity of the reticular formation disconnects the thalamus from the cerebral cortex and decreases the level of consciousness. 

d. Orexins are neurotransmitters that stimulate the reticular formation.