Post Test 3

Question 1

The somatic nervous system includes ______________ nerves that carry motor signals from the central nervous system to the muscles.

Answer 1

Efferent

Question 2

The ______________ is the part of the peripheral nervous system that regulates the body’s internal environment.

Answer 2

Automatic Nervous System

Question 3

The brain and the spinal cord are the only organs that are protected with three layers of protective membranes called _____________.

Answer 3

Meninges

Question 4

______________ or “tough mother” is the outer meninx.

Answer 4

Dura Mater

Question 5

The ______________ nervous system is activated when you encounter threatening information such as a bear attacking you. This system is essential for the initiation of fight-or-flight responses.

Answer 5

Sympathetic

Question 6

Motor nerves that project from the brain and
the lower region of the spine are called ______________ nerves.

Answer 6

Parasympathetic

Question 7

The ______________ nerve is a purely sensory nerve that transfers visual information from the retina of the eye to the brain.

Answer 7

Optic

Question 8

The ______________ nerve is the nerve cell that extends directly from the brain to the gut

Answer 8

Vagus

Question 9

The ______________ is a channel that connects the third and fourth ventricles in the brain.

Answer 9

Cerebral Aqueduct

Question 10

The ventricles of patients with a congenital condition called ______________ build up fluid as a result of blocked channels in the brain.

Answer 10

Hydrocephalus

Question 11

Many toxic substances that are present in the bloodstream are prohibited from entering the brain by a mechanism called the ______________ where cells of blood vessel walls are tightly packed, forming a barrier to the passage of large proteins.

Answer 11

Blood-brain barrier

Question 12

Unlike large toxic molecules, ______________, which is critical for the function of the brain, is actively transported through the vessel walls.

Answer 12

glucose