26 of 50
What is the name of fibers that carry information from the skin, joints, and skeletal muscles to the central nervous system?
27 of 50
Which of these neuroglial cells forms the myelin sheath around the central nervous system nerve fibers?
28 of 50
The Schwann cell forms a myelin sheath around which of the following in the peripheral nervous system?
|Nodes of Ranvier|
29 of 50
What is the name for the neuron processes that normally receive incoming stimuli?
30 of 50
What is the name of the collections of nerve cell bodies inside the CNS?
|Tracts or ganglia|
31 of 50
What is the major role of the interneuron?
|To form a lipid-protein (lipoprotein) cell membrane on the outside of axons.|
|To carry information from the central nervous system to muscles and/or the viscera.|
|To detect the amount of stretch in skeletal muscles or tendons and their joints.|
|To connect motor and sensory neurons in their pathways.|
|To transmit nerve impulses from the skin and organs to the central nervous system.|
32 of 50
What are the two major functional properties of neurons?
|Cover and line body surfaces|
|Connect and protect|
|Contraction and movements|
|Lubricate and secrete|
|Irritability and conductivity|
33 of 50
An action potential is caused by an influx of which of these ions into the cell?
|Both potassium and sodium|
34 of 50
Which one of the following is the correct sequence of events that shows the sequence of events of a nerve impulse?
- The membrane becomes depolarized. Sodium channels open and sodium ions diffuse inward. The membrane becomes repolarized.
- Potassium channels open and potassium ions diffuse outward while sodium is actively transported out of the cell.
|1, 2, 4, 3|
|3, 2, 4, 1|
|2, 1, 4, 3|
|2, 1, 3, 4|
|4, 1, 3, 2|
35 of 50
What is the name of the gap between two communicating neurons?
|Node of Ranvier|
36 of 50
Which of the following describes neurons in which impulse conduction is fastest?
37 of 50
Which type of reflex involves skeletal muscles?
38 of 50
Which of the following is the correct sequence in a typical reflex arc?
|Receptor, efferent neuron, integration center, afferent neuron, effector|
|Receptor, afferent neuron, integration center, efferent neuron, effector|
|Effector, afferent neuron, integration center, efferent neuron, receptor|
|Effector, efferent neuron, integration center, afferent neuron, receptor|
|Receptor, afferent neuron, efferent neuron, integration center, effector|
39 of 50
The midbrain, pons, and medulla oblongata are housed in which of the following?
40 of 50
Which one of the following represents the correct sequence from outermost to innermost layers of the meninges?
|Pia mater, dura mater, arachnoid mater|
|Dura mater, arachnoid mater, pia mater|
|Arachnoid mater, dura mater, pia mater|
|Dura mater, pia mater, arachnoid mater|
|Pia mater, arachnoid mater, dura mater|
41 of 50
The blood-brain barrier is effective against the passage of which of the following?
|Metabolic waste such as urea|
|Nutrients such as glucose|
42 of 50
A stroke in the primary motor area has caused Don to lose control over his skeletal muscles on the right side of his body. What lobe of his brain was damaged?
43 of 50
Control of temperature, endocrine activity, metabolism, and thirst are functions associated with which of the following?
44 of 50
Loss of muscle coordination results from damage to which of the following?
45 of 50
Which of the following sensations is related to the function of the olfactory nerve?
46 of 50
Which of the following describes the gray matter of the spinal cord?
|It surrounds the white matter of the spinal cord.|
|It contains myelinated fiber tracts.|
|It surrounds the central canal.|
|It always carries sensory information to the brain.|
|It is made up of the dorsal, lateral, and ventral columns.|
47 of 50
Which of the nerve plexuses serves the shoulder and arm?
48 of 50
The sympathetic and parasympathetic nervous systems are subdivisions of which of the following?
|Somatic nervous system|
|Voluntary nervous system|
|Peripheral nervous system|
|Central nervous system|
|Autonomic nervous system|
49 of 50
Which of the following effects is characteristic of the parasympathetic nervous system?
|Stimulates sweat glands to produce perspiration.|
|Decreases urine output.|
|Decreases activity of the digestive system.|
|Decreases heart rate.|
|Increases metabolic rate.|
50 of 50
Which one of the following statements about aging is most accurate?
|The brain reaches its maximum weight around the seventh decade of life.|
|Synaptic connections are too fixed to permit a great deal of learning after the age of 35.|
|Increased efficiency of the sympathetic nervous system enhances the ability to learn.|
|Learning throughout the adult and aging years is supported primarily by glial proliferation.|
|Despite some neuronal losses, an unlimited number of neural pathways are available and ready to be developed; therefore, additional learning can occur throughout life.|