Ch. 12 Flashcards

1
Q
  1. The peripheral nervous system can be divided into:
    a. Somatic nervous system
    b. Autonomic nervous system
    c. Enteric nervous system
    d. All of the above
A

d. All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. The motor portion of the autonomic nervous system can be divided into:
    a. Sympathetic division
    b. Parasympathetic division
    c. Enteric division
    d. Both a and b
    e. All of the above
A

All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. This has the property of electrical excitability.
    a. Muscle cells
    b. Neurons
    c. All of the above
    d. None of the above
A

c. All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. This is the site of protein synthesis in a neuron.
    a. Mitochondria
    b. Nucleus
    c. Nissl body
    d. Dendrite
    e. Axon
A

c. Nissl body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. Nerve fiber refers to:
    a. Axon
    b. Dendrites
    c. Nissl body
    d. Both a and b
    e. All of the above
A

d. Both a and b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. This type of neuron has one main dendrite and one main axon.
    a. Multipolar neuron
    b. Bipolar neuron
    c. Unipolar neuron
    d. Purkinje cell
    e. Renshaw cell
A

b. Bipolar neuron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. Schwann cells begin to form myelin sheaths around axons
    a. When neurons are injured
    b. During fetal development
    c. After birth
    d. Only in response to a disorder
    e. None of the above
A

b. During fetal development

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. This contains neuronal cell bodies, dendrites, unmyelinated axons, axon terminals and neruoglia.
    a. Gray matter
    b. White matter
    c. Astrocytes
    d. Satellite cells
    e. Ependymal cells
A

a. Gray matter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. Which is not a type of channel used in production of an electrical signal in neurons?
    a. Leakage channel
    b. Voltage-gated channel
    c. Ligand-gated channel
    d. Mechanically gated channel
    e. Ion dependent channel
A

e. Ion dependent channel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. The resting membrane potential in neurons ranges from:
    a. +5 to 100 mV
    b. –25 to -70 mV
    c. –40 to –90 mV
    d. –90 to 5 mV
    e. None of the above
A

c. –40 to –90 mV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. A polarized cell
    a. Can vary from +5 to –100 mV
    b. Includes most cells of the body
    c. Exhibits a membrane potential
    d. Both b and c
    e. All of the above
A

e. All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. Sodium pumps are considered electrogenic because
    a. They contribute to the negativity of the resting membrane potential
    b. Because the sodium ions a re negatively charged
    c. Because they exhibit low permeability
    d. Both a and b
    e. All of the above
A

a. They contribute to the negativity of the resting membrane potential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. A depolarizing graded potential
    a. Makes the membrane more polarized
    b. Makes the membrane less polarized
    c. Is not considered a graded potential
    d. Is the last part of an action potential
    e. Is seen when the cell approaches threshold
A

b. Makes the membrane less polarized

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. When a depolarizing graded potential makes the membrane depolarize to threshold
    a. Ligand gated Ca+ channels close rapidly
    b. Voltage gated CA+ channels open rapidly
    c. Ligand gated Na+ channels close rapidly
    d. Voltage gated Na+ channels open rapidly
    e. None of the above
A

d. Voltage gated Na+ channels open rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. During the resting state of a voltage gated Na+ channel
    a. The inactivation gate is open
    b. The activation gate is closed
    c. The channel is permeable
    d. Both a and b
    e. All of the above
A

c. The channel is permeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. During which period can a second action potential be initiated by a larger than normal stimulus?
    a. Refractory period
    b. Absolute refractory period
    c. Relative refractory period
    d. All of the above
    e. None of the above
A

c. Relative refractory period

17
Q
  1. Saltatory conduction
    a. Occurs through unmyelinated axons
    b. Happens due to even distribution of voltage gated channels
    c. Encode only action potentials in response to pain
    d. Both a and b
    e. None of the above
A

e. None of the above

18
Q
  1. Which axons have the largest diameter?
    a. A fibers
    b. B fibers
    c. C fibers
    d. None of the above
A

a. A fibers

19
Q
  1. What phenomenon explains why a light touch feels different than a touch applied with more pressure?
    a. Saltatory conduction
    b. Continuous conduction
    c. Frequency of impulses
    d. Propagation
    e. Refractory period
A

c. Frequency of impulses

20
Q
  1. Which of the following is not a function of the nervous system?
    a. Sensory function
    b. Integrative function
    c. Motor function
    d. All are functions of the nervous system
A

d. All are functions of the nervous system

21
Q
  1. Which of the following terms describes synapses?
    a. Axodendritic
    b. Axosomatic
    c. Axoaxonic
    d. None of the above
    e. All of the above
A

e. All of the above

22
Q
  1. Faster communication and synchronization are two advantages of
    a. Chemical synapsis
    b. Electrical synapses
    c. Ligand gated channels
    d. Voltage gated channels
    e. Mechanically gated channels
A

b. Electrical synapses

23
Q
  1. If a neurotransmitter depolarizes the postsynaptic membrane it is referred to as:
    a. Excitatory
    b. Inhibitory
    c. Spatial
    d. Temporal
    e. Summation
A

Excitatory

24
Q
  1. IPSP stands for:
    a. Inhbitory presynaptic summation potential
    b. Inhibitory postsynaptic summation potential
    c. Inhibitory postsynaptic potential
    d. Inhibitory presynaptic potential
    e. None of the above
A

c. Inhibitory postsynaptic potential

25
25. Diffusion, enzymatic degradation, and uptake by cells are all ways to a. Remove a neurotransmitter b. Stop a spatial summation c. Continue a temporal summation d. Inhibit a presynaptic potential e. Excite a presynaptic potential
a. Remove a neurotransmitter
26
26. Where does summation occur? a. In the synaptic cleft b. In the dendrites c. At the trigger zone d. In the neuron nucleus e. In the neuroplasm
c. At the trigger zone
27
27. A postsynaptic neuron may respond to inhibitory and excitatory effects in which of the following ways: a. EPSP b. Nerve impulse c. IPSP d. Both a and c e. All of the above
e. All of the above
28
28. Which of the following is not considered a small molecule neurotransmitter? a. Acetylcholine b. Biogenic amines c. Purines d. Endorphins e. Serotonin
Endorphins
29
29. This neural circuit consists of a single presynaptic neuron synapsing with several postsynaptic neurons. a. Diverging circuit b. Converging circuit c. Reverberating circuit d. Parallel after discharge circuit e. Normal circuit
a. Diverging circuit
30
30. Plasticity means a. The ability to regenerate b. Sending a signal through a converging circuit c. Signal transmission at a synapse d. Capability to change based on experience e. The ability to stretch without damage
d. Capability to change based on experience