Anatomy Chapter 12, 13, 14, 15, 16
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A somatic motor neuron carries
- 1.A somatic motor neuron carries
- A.
Information to signal visceral organ muscle contraction
- B.
Information such as pain from the visceral in the ventral cavity to the CNS
- C.
Motor commands to the skeletal muscles
- D.
Information from the skin to the CNS
- 2.Most synapses are found in the:
- A.
The CNS
- B.
Ganglia
- C.
White matter
- D.
The PNS
- 3.Which of the following is NOT a characteristic of neurons
- A.
Longevity
- B.
Inability to divide
- C.
High metabolic rate
- D.
Ability to survive without oxygen
- 4.Ganglia represent groups of:
- A.
Axons
- B.
Dendrites
- C.
Neuron body cells
- D.
Synapses
- 5.The majority of neurons in the body are:
- A.
Multipolar
- B.
Bipolar
- C.
Unipolar
- D.
Pseudunipolar
- 6.Which of the following structures is found only in the PNS and not in the CNS
- A.
A tract
- B.
White matter
- C.
A ganglion
- D.
Gray matter
- 7.Interneurons are found only in the:
- A.
Visceral nervous system
- B.
CNS
- C.
PNS
- D.
ANS
- 8.Which cells provide the myelin sheaths for the neurons in the CNS
- A.
Schwann cells
- B.
Astrocytes
- C.
Microglial cells
- D.
Oligodendrocytes
- 9.Which of the following is the correct order of the components in a reflex arc:
- A.
Receptor, sensory neuron, integration center, motor neuron, effector
- B.
Effector, sensory neuron integration center, receptor, motor neuron
- 10.White matter represents
- A.
Aggregations of cell bodies in the brain
- B.
Aggregations of neuron cell bodies in the spinal column
- C.
Myelinated axons traveling together in the CNS
- 11.Action potentials travel along the
- A.
Axon membrane
- B.
Dendrite membrane
- C.
Cell body
- D.
Satelitte
- 12.The peripheral nerve fibers that would measure the degree of stretch in a the biceps brachii muscle and its tendons would be an example of a:
- A.
General somatic sensory
- B.
General somatic motor
- C.
General visceral motor
- D.
Special visceral sensory
- 13.All of the following are characteristics of the dendrites except that they
- A.
Have more extensive branching than axons
- B.
Always conduct action potentials
- C.
Conduct signals towards the cell body
- 14.Myelin on axons functions to:a. make axons live longer b. store nutrients (fat) for use of the neuronc. cover the nodes of Ranvier d. speed the rate of impulse conduction and insulate the axon
- A.
A
- B.
B
- C.
C
- D.
D
- 15.Unmyelinated axons area. thicker than myelinated axons b. are not associated with Schwann cellsc. conduct impulses more slowly than myelinated axons d. occur the PNS only
- A.
A
- B.
B
- C.
C
- D.
D
- 16.Which of the following immediately encloses a single neuron?a. endoneurium b. perineurium c. fascicle d. indoneurium
- A.
A
- B.
B
- C.
C
- D.
D
- 17.A man walking barefoot steps on a piece of glass. His foot jerks upwards in which type of reflexa. somatic, polysynaptic, withdrawal b. visceral, monosynaptic, stretchc. somatic, monosynaptic, withdrawal d. visceral, polysynaptic, withdrawa
- A.
A
- B.
B
- C.
C
- D.
D
- 18.Gray matter in the CNS contains all of the following excepta. neuronal cell bodies b. neuroglia c. dendrites d. fiber tracts
- A.
A
- B.
B
- C.
C
- D.
D
- 19.The chemical substance that is released at the axon terminal is called aa. hormone b. neurotransmitter c. synaptic vesicle d. nissl body
- A.
A
- B.
B
- C.
C
- D.
D
- 20.In the spinal cord, the cell bodies of most interneurons line in thea. sensory ganglia b. PNS c. dorsal half of gray matter d. ventral half of white matter
- A.
A
- B.
B
- C.
C
- D.
D
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