Univ. of Illinois, Urbana-Champaign Bio/Neuro 303 Chapter 3 - Study Questions *** LAST UPDATED 03 October 2002 *** 44. White matter in the central nervous system is formed in part by a. motor neuron axons. b. sensory neuron dendrites. c. Schwann cells. *d. Oligodendroglial cells. 45. In invertebrate ganglia, *a. somata lie around the periphery. b. there is an amorphous mixture of somata, neurites, and glia. c. dendrites are outside and somata inside. d. none of the above descriptions is true. 46. Neuropil is a. the region of the vertebrate central nervous system known as white matter. *b. those regions of the invertebrate central nervous system where synapses are located. c. the cortex of the vertebrate brain. d. the outer region of an invertebrate ganglion. 47. In an invertebrate ganglion, *a. somata lie around the periphery and neurites project toward the center. b. somata lie at the center and neurites project toward the periphery. c. there is an amorphous mixture of somata, neurites, and glia. d. none of the above are typical, the arrangement varies from case to case. 48. The dorsal roots of the spinal cord carry *a. sensory information only. b. motor information only. c. mixed sensory and motor information. d. motor and sensory information alternately. 49. A "nucleus" in the brain is a. the site of synthesis of the biochemical constituents of the brain. b. a center in which a particular brain function is carried out. *c. a local aggregation of nerve cell bodies. d. the site to which particular sensory inputs all coverage. 51. White matter in the spinal cord contains mainly a. axons of incoming sensory neurons. *b. axons of ascending and descending interneurons. c. cell bodies of motor neurons. d. regions of synapses between motor and other neurons. 54. The hindbrain is composed of *a. the pons, the medulla, and the cerebellum. b. the pons and the medulla. c. the tectum and the tegmentum. d. the pons, the medulla, and the basal ganglia. 55. As one moves up from the spinal cord in primates, one encounters (in order) the a. cerebellum, superior colliculi, pons and thalamus. *b. medulla, pons, hypothalamus and cerebral hemispheres. c. pons, medulla, hypothalamus and cerebral hemispheres. d. cerebellum, medulla, thalamus and basal ganglia. 58. The part of the brain thought to be important in balance and complex motor performance is the *a. cerebellum. b. limbic system. c. inferior colliculus. d. hypothalamus. 63. The medulla contains centers for a. motor planning and control. *b. the control of respiration, vomiting, and heart rate. c. the processing of visual input. d. "higher" mental functions, learning and memory. 64. One of the main subdivisions of the midbrain is the *a. tegmentum. b. telencephalon. c. diencephalon. d. cerebellum 65. In Xenopus, cells from the retina project to the optic tectum. The optic tectum is part of the a. diecephalon. b. telencephalon. *c. midbrain. d. hindbrain. 67. The basal ganglia are a group of nuclei that are a. found mainly in the brainstem. b. found mainly in the midbrain. *c. involved in motor planning and control. d. involved in the control of respiration and heart rate. 68. One of the main subdivisions of the forebrain is the a. tegmentum. b. cerebellum. *c. diencephalon. d. mesencephalon. 69. One of the main subdivisions of the forebrain is the a. tegmentum. *b. telencephalon. c. tectum. d. metencephalon. 70. The lateral geniculate nucleus, medial geniculate nucleus and hypothalamus are all part of the a. hindbrain. b. midbrain. *c. diencephalon. d. telencephalon. 71. The thalamus, hypothalamus and pituitary gland are all part of the a. telencephalon. *b. diencephalon. c. tectum. d. midbrain 73. The large bundle of axons involved in the transfer of information between the two cerebral hemispheres in man is the *a. corpus callosum. b. basal ganglia. c. inferior colliculus. d. substantia nigra.