Ch. 2 - Evolve Quiz Questions Flashcards Preview

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Flashcards in Ch. 2 - Evolve Quiz Questions Deck (20):
1

Which of the following would differentiate a motor neuron from a sensory neuron?

a) Location of synapse
b) Location of cell body
c) Location of axon
d) Location of extracellular fluid

B) LOCATION OF CELL BODY

[The main components of sensory & motor neurons are the same; the main difference between a sensory neuron & a motor neuron is the location of the cell body. The locations of the synapse, cell body, & extracellular fluid are essentially the same in a motor & sensory neuron.]

2

_____ conduct both incoming & outgoing nerve transmissions.

a) Efferent nerves
b) Afferent nerves
c) Mixed nerves
d) Combination nerves

C) MIXED NERVES

[Mixed nerves have both afferent & efferent nerves & can transmit both incoming & out coming messages. Efferent nerves conduct only outgoing impulses. Afferent nerves conduct only incoming impulses. The term combination nerve is not valid.]

3

The location of the fasciculi will determine how & when the local anesthetic takes effect: _____ bundles receive a _____ concentration of the anesthetic _____.

a) core, diluted, first
b) mantle, higher, first
c) core, higher, first
d) mantle, diluted, last

B) MANTLE, HIGHER, FIRST

[Mantle bundles will receive the anesthetic (and the resulting effects at a higher concentration BEFORE the core bundles.]

4

The nervous system is organized by location, direction of nerve impulse, & function. Which of the following categorizes the nervous system by FUNCTION?

a) Somatic & autonomic nervous systems
b) Central & peripheral nervous systems
c) Afferent & efferent divisions of the nervous systems
d) Both B & C

A) SOMATIC & AUTONOMIC NERVOUS SYSTEMS

[The somatic & autonomic nervous systems are organized according to function. The central & peripheral nervous systems are organized by location & direction of nerves. The afferent & efferent divisions of the nervous systems are organized by direction of nerves.]

5

The somatic nervous system carries information to voluntary & reflex motor organs. Somatic effectors control smooth muscle, cardiac muscle, & glandular tissue.

a) The 1st statement is TRUE; the 2nd statement is FALSE.
b) The 1st statement is FALSE; the 2nd statement is TRUE.
c) Both statements are TRUE.
d) Both statements are FALSE.

A) THE 1st STATEMENT IS TRUE; THE 2nd STATEMENT IS FALSE.

[Smooth muscle & cardiac muscle are involuntary tissue.]

6

The _____ division of the autonomic nervous system is involved in the _____ response.

a) parasomatic, "rest or digest"
b) parasympathetic, "fight or flight"
c) sympathetic, "rest or digest"
d) sympathetic, "fight or flight"

D) SYMPATHETIC, "FIGHT OR FLIGHT"

[The sympathetic division of the autonomic nervous system aids the body in preparing for emergency situation through the "fight or flight" response. The parasympathetic division of the autonomic nervous system is involved in the "rest or digest" response. The term parasomatic is invalid.]

7

Which of the following is the nervous system's basic functioning unit?

a) Brain
b) Spinal cord
c) Neuron
d) Perineurium

C) NEURON

[The excitable cell that functions as the fundamental unit of the nervous system is the neuron.]

8

Compared to the other organ systems of the body, the nervous system consumes _____ energy (glucose) & oxygen.

a) the same amount
b) less
c) more
d) a quarter of the

C) MORE

[The nervous system consumes more oxygen & glucose than any other human organ.]

9

Which of the following is another term for nerve fiber?

a) Soma
b) Axon
c) Myelin
d) Node

B) AXON

[The nerve's cord-like structure is composed of many axons, sometimes referred to as nerve fibers. The term soma refers to the cell body. Myelin is a protective lipoprotein sheath. The term node refers to a projection of tissue.]

10

Axons that extend from the soma TOWARD the CNS are call PERIPHERAL FIBERS. Axons that extend from the soma AWAY FROM the CNS are called CENTRAL FIBERS.

a) The 1st statement is TRUE; the 2nd statement is FALSE.
b) The 1st statement is FALSE; the 2nd statement is TRUE.
c) Both statements are TRUE.
d) Both statements are FALSE.

D) BOTH STATEMENTS ARE FALSE.

[TOWARD the CNS = CENTRAL FIBERS; AWAY FROM the CNS = PERIPHERAL FIBERS]

11

The majority of sensory input to the neuron occurs at the _____.

a) dendritic zone
b) axon hillock
c) synaptic knobs
d) soma

A) DENDRITIC ZONE

[The dendritic zone is where the bulk of input to the neuron occurs. The axon hillock is generally involved in info outflow. The synaptic knobs (output zone) are involved in information outflow. The cell body (soma) is not involved in impulse transmission.]

12

The cell body (soma) in a sensory neuron is responsible for which of the following?

a) Metabolic support
b) Protein synthesis
c) Impulse transmission
d) Both A & B

D) BOTH A & B

[The cell body (soma) is responsible for protein synthesis & metabolic support but not impulse transmission.]

13

The axon hillock can receive & transmit impulses from other neurons. The axon hillock is the most easily excited part of the neuron.

a) The 1st statement is TRUE; the 2nd statement is FALSE.
b) The 1st statement is FALSE; the 2nd statement is TRUE.
c) Both statements are TRUE.
d) Both statements are FALSE.

C) BOTH STATEMENT ARE TRUE.

[The most easily excited part of the neuron (axon hillock) can both receive & transmit impulses from other neurons.]

14

A neuron with only one axon has the potential to innervate or communicate with _____ target cell(s).

a) one
b) three
c) five
d) many

D) MANY

[A single axon can communicate with many target cells.]

15

Which of the following will speed the conduction of an impulse across a nerve fiber?

a) A very small axon diameter
b) A myelin sheath
c) A large axon diameter
d) Both B & C

D) BOTH B & C

[The impulse conduction is faster is large, myelinated nerve fibers.]

16

The myelin sheath is primarily composed of _____.

a) lipid
b) protein
c) glucose
d) calcium

A) LIPID

[The myelin sheath's main component is lipid. Protein makes up only 20% of the myelin sheath. Glucose & calcium is not a component in the myelin sheath.]

17

Many of the neurologic symptoms in _____ are present due to a pathologic demyelination of axons.

a) Parkinson's disease
b) Multiple sclerosis
c) Alzheimer's disease
d) Meningitis

B) MULTIPLE SCLEROSIS

[Many neurologic symptoms in multiple sclerosis are caused by a pathologic demyelination of axons, not Parkinson's disease, Alzheimer's disease, or meningitis.]

18

Which of the following nerve fibers are NOT responsible for dental pain?

a) Type A
b) Type B
c) Type C
d) Both A & C

B) TYPE B

[Type B fibers are motor fibers - they are not responsible for dental pain. Type A fibers conduct sharp, bright dental pain. Type C fibers conduct dull, aching dental pain.]

19

Which of the following statements is TRUE?

a) The most abundant type of oral nerve fibers are Type C fibers.
b) Type C fibers require a greater volume of local anesthetic to achieve profound anesthesia than do the larger Type A fibers.
c) Type C fibers are responsible for bright, sharp dental pain.
d) Type C fibers are usually myelinated.

A) THE MOST ABUNDANT TYPE OF ORAL NERVE FIBERS ARE TYPE C FIBERS.

[Type C fibers require LESS local anesthetic to achieve profound anesthesia than do the larger Type A fibers. Type C fibers are usually unmyelinated. Type A fibers are responsible for bright, sharp dental pain.]

20

Not all nerve fibers are sensitive to local anesthetics. However, nerve fibers with smaller diameters are usually more sensitive than those with larger diameters.

a) The 1st statement is TRUE; the 2nd statement is FALSE.
b) The 1st statement is FALSE; the 2nd statement is TRUE.
c) Both statements are TRUE.
d) Both statements are FALSE.

B) THE 1st STATEMENT IS FALSE; THE 2nd STATEMENT IS TRUE.

[ALL nerve fibers are sensitive to local anesthetics.]