BIO 201 EXAM 4
1. Meningitis can be caused by infection of the central nervous system by bacteria. Which
cells would be most responsible for removing the infection?
-satellite cells
-Schwann cells
-microglia
-oligodendrocytes: microglia
2. Schwann cells are functionally similar to .
-ependymal cells
-microglia
-oligodendrocytes
-astrocytes: oligodendrocytes
3. Which of the following pairings does not fit?
-sensory neurons: afferent neurons
-motor neurons: efferent neurons
-multipolar neurons: peripheral nervous system sensory neurons -association neuron:
interneurons: multipolar neurons: peripheral nervous system sensoryneurons
4. Many neurons have many short, branching extensions called dendrites.What is the benefit
of these structures for a neuron?
-There is a large area for production of chemicals used to signal other neu-rons.
-There is a large amount of space for myelin to form and make electricalconduction more
efficient.
-There is a large surface area to send signals to other cells.
-The dendrites provide a large surface area for connections from other neu- rons.: The
dendrites provide a large surface area for connections from other neu-rons
5. Which of the following is true of axons?
-A neuron can have only one axon, but the axon may have occasional branchesalong its length.
-Axons use chemically gated ion channels to generate graded potentials.
,-Neurons can have multiple axons but only one dendrite.
-Smaller (thinner) axons are more likely to bear myelin sheaths than larger (thicker) axons.: A
neuron can have only one axon, but the axon may have occa-sional branches along its length
6. Which criterion is used to functionally classify neurons?
-the number of processes extending from the cell body neuron -whether thenerve fibers are
myelinated or unmyelinated
-the direction in which the nerve impulse travels relative to the central nervoussystem
-whether the neurons are found within the CNS or the PNS: the direction in whichthe nerve
impulse travels relative to the central nervous system
7. Like all cells, the neurons' internal organization dictates its function. Neu-rons have
relatively many mitochondria, an extensive network of rough en- doplasmic reticulum and
many clusters of ribosomes. These cellular featuresindicate all of the following EXCEPT .
-neurons have stable, relatively unchanging internal environments -neuronsmust meet a high
demand for ATP
-neurons have a relatively high consumption of oxygen
-neurons produce many proteins: neurons have stable, relatively unchanginginternal
environments
8. Which of the following is NOT a function of dendrites?
-produce short-distance signals called graded potentials
-generate nerve impulses and transmit them away from the cell body -conveyincoming
messages toward the cell body
-provide enormous surface area for receiving signals from other neurons: -
generate nerve impulses and transmit them away from the cell body
9. Bipolar neurons are commonly .
-motor neurons
-found in ganglia
-called neuroglial cells
-found in the retina of the eye: found in the retina of the eye
, 10. Collections of nerve cell bodies outside the central nervous system arecalled .
-nerves
-tracts
-ganglia
-nuclei: ganglia
11. In the motor division of the PNS, the effector organs consist of the three types of muscle
tissue and glands. Which of these effector organs would be under voluntary control and thereby
fall into the somatic nervous system?
-Skeletal muscle
-Smooth muscle
-Cardiac muscle
-Glands: Skeletal muscle
12. What is the basic condition when a neuron is described as polarized?
-Na+ is found outside of the neuron.
-There is a separation of positive and negative charges across a membrane.
-Na+ is found outside of the neuron and K+ is found inside of the cell. -There are large, protein
anions inside the neuron.: There is a separation of positive and negative charges across a
membrane
13. Which of the following statements is correct regarding the polarization of a neuronal
membrane and the formation of a resting membrane potential?
-As sodium leaks into the cell, the inside of the cell becomes more negative.
-As Na+ leaks across the membrane, that establishes a negative charge insidethe membrane.
-Sodium/Potassium pumps maintain concentration gradients; sodium and
potassium move down their concentration gradients through leakage chan-nels.
-A resting potential can be generated without the energy as an input.: Sodi-um/Potassium
pumps maintain concentration gradients; sodium and potassium move down their
concentration gradients through leakage channels
14. Which of the following does NOT describe conditions that occur during anaction
potential?
1. Meningitis can be caused by infection of the central nervous system by bacteria. Which
cells would be most responsible for removing the infection?
-satellite cells
-Schwann cells
-microglia
-oligodendrocytes: microglia
2. Schwann cells are functionally similar to .
-ependymal cells
-microglia
-oligodendrocytes
-astrocytes: oligodendrocytes
3. Which of the following pairings does not fit?
-sensory neurons: afferent neurons
-motor neurons: efferent neurons
-multipolar neurons: peripheral nervous system sensory neurons -association neuron:
interneurons: multipolar neurons: peripheral nervous system sensoryneurons
4. Many neurons have many short, branching extensions called dendrites.What is the benefit
of these structures for a neuron?
-There is a large area for production of chemicals used to signal other neu-rons.
-There is a large amount of space for myelin to form and make electricalconduction more
efficient.
-There is a large surface area to send signals to other cells.
-The dendrites provide a large surface area for connections from other neu- rons.: The
dendrites provide a large surface area for connections from other neu-rons
5. Which of the following is true of axons?
-A neuron can have only one axon, but the axon may have occasional branchesalong its length.
-Axons use chemically gated ion channels to generate graded potentials.
,-Neurons can have multiple axons but only one dendrite.
-Smaller (thinner) axons are more likely to bear myelin sheaths than larger (thicker) axons.: A
neuron can have only one axon, but the axon may have occa-sional branches along its length
6. Which criterion is used to functionally classify neurons?
-the number of processes extending from the cell body neuron -whether thenerve fibers are
myelinated or unmyelinated
-the direction in which the nerve impulse travels relative to the central nervoussystem
-whether the neurons are found within the CNS or the PNS: the direction in whichthe nerve
impulse travels relative to the central nervous system
7. Like all cells, the neurons' internal organization dictates its function. Neu-rons have
relatively many mitochondria, an extensive network of rough en- doplasmic reticulum and
many clusters of ribosomes. These cellular featuresindicate all of the following EXCEPT .
-neurons have stable, relatively unchanging internal environments -neuronsmust meet a high
demand for ATP
-neurons have a relatively high consumption of oxygen
-neurons produce many proteins: neurons have stable, relatively unchanginginternal
environments
8. Which of the following is NOT a function of dendrites?
-produce short-distance signals called graded potentials
-generate nerve impulses and transmit them away from the cell body -conveyincoming
messages toward the cell body
-provide enormous surface area for receiving signals from other neurons: -
generate nerve impulses and transmit them away from the cell body
9. Bipolar neurons are commonly .
-motor neurons
-found in ganglia
-called neuroglial cells
-found in the retina of the eye: found in the retina of the eye
, 10. Collections of nerve cell bodies outside the central nervous system arecalled .
-nerves
-tracts
-ganglia
-nuclei: ganglia
11. In the motor division of the PNS, the effector organs consist of the three types of muscle
tissue and glands. Which of these effector organs would be under voluntary control and thereby
fall into the somatic nervous system?
-Skeletal muscle
-Smooth muscle
-Cardiac muscle
-Glands: Skeletal muscle
12. What is the basic condition when a neuron is described as polarized?
-Na+ is found outside of the neuron.
-There is a separation of positive and negative charges across a membrane.
-Na+ is found outside of the neuron and K+ is found inside of the cell. -There are large, protein
anions inside the neuron.: There is a separation of positive and negative charges across a
membrane
13. Which of the following statements is correct regarding the polarization of a neuronal
membrane and the formation of a resting membrane potential?
-As sodium leaks into the cell, the inside of the cell becomes more negative.
-As Na+ leaks across the membrane, that establishes a negative charge insidethe membrane.
-Sodium/Potassium pumps maintain concentration gradients; sodium and
potassium move down their concentration gradients through leakage chan-nels.
-A resting potential can be generated without the energy as an input.: Sodi-um/Potassium
pumps maintain concentration gradients; sodium and potassium move down their
concentration gradients through leakage channels
14. Which of the following does NOT describe conditions that occur during anaction
potential?
