1.
The central nervous system (CNS) consists of:
Correct Answer
A. Brain & spinal cord
2.
What portion of a neuron contains a well defined nucleolus within the nucleus and a grandular cytoplasm?
Correct Answer
C. Cell body (soma)
3.
___________ neurons have one dendrite and one axon. They are associated with the special senses; for example, the retina of the eye.
Correct Answer
B. Bipolar
4.
The period of time during which the membrane recovers and cannot initiate another action potential.
Correct Answer
C. Absolute refractory period
5.
The junction between a nerve and a muscle is called a what?
Correct Answer
B. Neuromuscular
6.
The region of the sarcolemma adjacent to the axon terminal is the what?
Correct Answer
B. Motor end plate
7.
What is the portion of a neuron that conducts impulses from the neuron to the dendrites of another neuron or to an effector neuron of the body? Each neuron possesses only one of these.
Correct Answer
B. Axon
8.
Nerve cells that conduct impulses toward the brain
Correct Answer
D. Afferent (sensory) system
9.
Parasympathetic division generally...
Correct Answer
D. Decreases an organ's activity
10.
A white phospholipid that covers the axons of many neurons is known as...
Correct Answer
C. Myelin
11.
What functions in carrying impulses from one neuron to another within the brain?
Correct Answer
E. Interneurons
12.
What occurs when the inside of the nerve becomes positive when channel (gates) in the membrane open to permit sodium ions to the center?
Correct Answer
B. Depolarization
13.
_______________has numerous dendritic fibers.
Correct Answer
peripheral branch
purkinje cell
pyramidal cell
axon terminals
14.
The response of neurons to stimuli and the conversion of these stimuli to impulses is _____________ which results in an impulse traveling along the length of the nerve, and this is known as ___________________.
Correct Answer
repolarization
conduction
depolarization
non conduction
15.
_______________ occurs only in unmyelenated nerve fibers and _______________occurs in myelinated fibers.
Correct Answer
saltatory conduction
continuous conduction
16.
_________________ forms the gray matter of the CNS; __________________forms the white matter of the CNS
Correct Answer
myelin
unmyelinated
17.
Structural criteria for neuron classification relate to the number of processes (projections) extending from the cell body.A. ________________ have multiple dendrites and one axon (most common).B. ________________ have one dendrite and one axon and are associated with the special senses; (ex: retina of the eye).C. ________________ have only one process extending from the cell body; they are found in the dorsal (sensory) root ganglia of the spine; the process divides into: A __________________ which acts as an axon A___________________which acts as a dendriteD. ________________ function in carrying impulses away from one neuron to another with the brain. There are two types: The _________________ has numerous dendritic fibers The _________________ body is shaped somewhat like a pyramid
Correct Answer
interneurons
unipolar neurons
multipolar neurons
bipolar neurons
Purkinje cell | central branch | synapse | pyrimidal cell | peripheral branch
18.
There are 5 main types of neuroglia:1. _______________ form a supporting network for the individual neurons2. _______________ attach to blood vessels forming a blood-brain barrier that prevents harmful substances and organisms from entering the CNS3. _______________ (Schwann cells)- produce myelin sheath that surrounds many nerve fibers4. _______________ engage in phagocytosis5. _______________ produce the cerebrospinal fluid (CSF) of the CNS
Correct Answer
Ependymal cells
astrocytes
oligodendrocytes
microglia
neurolemmocytes
19.
Nerve cells that conduct impulses toward the brain:
Correct Answer
C. Afferent system
20.
The nervous system has 2 major divisions:1. The _________________________ and the __________________________.
Correct Answer
integrative system
central nervous system
somatic nervous system
autonomic nervous system
peripheral nervous system
21.
What is the main neurotransmitter substance?
Correct Answer
D. ACh
22.
A _______________________ is a wave of electrical energy along the outside surface of the plasma membrane of a nerve.
Correct Answer
C. Nerve impulse (nerve action potential)
23.
___________________________ occurs when the inside of the nerve becomes positive and the outside becomes negative.
Correct Answer
C. Depolarization
24.
There are two types of nerve conduction:________________________ occurs only in unmyelinated nerve fibers and ________________________ occurs only in myelinated fibers.
Correct Answer
continuous
refractory
chemical
saltatory
electrical
25.
The cervical plexus innervates...
Correct Answer
A. Skin, muscles of head, neck, upper shoulders, and diaphragm
26.
The sacral plexus is related to what nerve?
Correct Answer
B. Sciatic nerve
27.
A spinal tap is used in the removal of CSF, it is usually taken within the __________________________ (area_______), and it is used to diagnose ____________________ conditions.
Correct Answer
C. Subarachnoid membrane (L4) / neurological
28.
There are 31 pairs of spinal nerves that are named according to the level of the spinal cord where they originate; There are:________of cervical spinal nerves________ of thoracic nerves________ of lumbar nerves________ of sacral nerves________ of coccygeal nerves
Correct Answer
B. 8, 12, 5, 5, 1
29.
Coverings (Deep Fascia)1. The entire nerve is covered by the ______________.2. Bundles of nerve fibers are called ______________ and wrapped in a connective tissue called the ________________.3. Individual nerve fibers, myelinated or unmyelinated, are wrapped in a connective tissue called __________________.
Correct Answer
endoneurium
epineurium
epimysium
perineurium
fascicles
30.
The meninges are 3 coverings that surround the spinal cord and brain. The dura mater is the __________________ and it is composed of _____________________.
Correct Answer
D. Outer most meninx / fibrous connective tissue
31.
__________________ refers to bundles of myelinated axons from many neurons.
Correct Answer
D. White matter
32.
Paralysis of the two upper and lower parts of the body and trunk...
Correct Answer
C. Quadriplegia
33.
______________ is an acute infection of the peripheral nerves by the virus herpes zoster (chickenpox virus).
Correct Answer
D. Shingles
34.
Myelinated fibers conduct impulses faster than unmyelinated fibers? True/False?
Correct Answer
A. True