A&P Test 7 Nervous System (Ch 7)

What are the two main functional subdivisions of the nervous system?

• central and peripheral
• somatic and autonomic
• sensory and motor
• autonomic and sympathetic

What cells form the myelin sheaths around nerve fibers in the PNS?

• satellite cells
• ependymal cells
• Schwann cells
• microglial cells

Support cells in the central nervous system are collectively called ________.

• myelin sheaths
• neuroglia
• oligodendrocytes
• microglia

Myelinated fibers (tracts) form ________ matter while unmyelinated fibers form ________ matter.

• sensory; motor
• gray; white
• motor; sensory
• white; gray

The thalamus, hypothalamus, and epithalamus collectively constitute the ________.

• cerebellum
• diencephalon interbrain
• brain stem
• cerebrum

What brain dysfunction results when blood supply to a region (or regions) of the brain is blocked and vital brain tissue dies, as by a blood clot or a ruptured blood vessel?

• cerebrovascular accident (CVA), or stroke
• Parkinson's disease
• Huntington's disease
• multiple sclerosis

The brain and spinal cord are protected and cushioned by three connective tissue membranes that are collectively called ________.

• ventricles
• arachnoid villi
• meninges
• sinuses

Cerebrospinal fluid is formed from blood by clusters of capillaries in the brain known as ________.

• choroid plexuses
• arachnoid villi
• ventricles
• sinuses

How many pairs of spinal nerves emerge from the spinal cord?

• 12
• 18
• 25
• 31

What division of the autonomic nervous system is often called the "rest-and-digest" division?

• somatic
• sympathetic
• parasympathetic
• afferent