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Anatomy Ch. 7
Uilani
| Question | Answer |
|---|---|
| The _____ nervous system is a complex network of nerve pathways embedded in the intestinal wall with a network of integrators and feedback loops that can act somewhat independently. | enteric |
| Which of these glia cells are located in the peripheral nervous system? | Schwann cells |
| Excitable cells that conduct the impulses are called | neurons |
| Which of the following is not a structural classification of neurons? | polar |
| What term describes the bundles of nerve fibers within the central nervous system? | tracts |
| The efferent pathways of the autonomic nervous system can be divided into the __________ divisions. Correct! | parasympathetic and sympathetic |
| Neurons have | very limited capacity to repair themselves. |
| The structural and functional center of the entire nervous system is the _____ nervous system. | central |
| A signal conduction route to and from the central nervous system is a(n) | reflex arc. |
| This tends to be the longest cytoplasmic projection from a neuron. | axon |
| What structure of the Schwann cell is essential to normal nerve growth and the regeneration of injured nerve fibers? | neurilemma |
| The glia cells that help form the blood-brain barrier are the | astrocytes |
| This is the site of communication between neurons. | synapse |
| The somatic nervous system carries information to the | skeletal muscles. |
| Chemical signals diffuse between neurons at this location. | synapse |
| The _____ of a neuron is a single process that usually extends from a tapered portion of the cell body. | axon |
| Bundles of myelinated fibers make up the | white matter of the nervous system. |
| The ________ of a presynaptic neuron associates with the dendrite of a postsynaptic neuron. | axon terminal |
| Nerves that originate from the brain are called _____ nerves. | cranial |
| These regions of the neuron direct electrical currents toward the cell body. | dendrite |
| In the human nervous system: | there are almost equal numbers of glia cells and neurons. |
| Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have: | a neurilemma. |
| Which is true of a reflex arc? | It always consists of an afferent neuron and an efferent neuron |
| A neuron that transmits a nerve impulse toward the central nervous system is called a(n): | sensory neuron. |
| Dendrites conduct impulses _____ cell bodies. | toward |
| The nervous system can be divided | in all of the above ways. |
| Which of the following compounds cannot cross the blood-brain barrier? | Dopamine |
| The nervous system is organized to do which of the following? | All of the above are true. Detect changes in the external environment. Detect changes in the internal environment. Evaluate changes in the environment. |
| Gray matter in the brain and spinal cord consists primarily of: | cell bodies. |
| Which is not true of the myelin sheath? | It covers cell bodies in the brain and spinal cord. |
| Along a neuron, the correct pathway for impulse conduction is: | dendrite, cell body, and axon. |
| The autonomic nervous system does not stimulate: | skeletal muscles. |
| One of the components of the blood-brain barrier is: | astrocytes |
| Fascicles are held together by a connective tissue layer called the: | perineurium |
| Small distinct regions of gray matter in the CNS are called: | nuclei |
| Which of the following is not a function of the central nervous system (CNS)? | All of the above are functions of the CNS. Integrating sensory information, Evaluating the information, Initiating an outgoing response |
| Multipolar neurons have: | multiple dendrites and one axon. |
| The efferent pathways of the autonomic nervous system consist of the ________ nervous systems. | sympathetic and parasympathetic |
| Interneurons reside in the: | CNS only. |
| Most unipolar neurons are usually | sensory neurons |
| The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: | somatic nervous system. |
| The afferent pathways of the autonomic nervous system: | carry feedback information to integrating centers in the brain. |
| Astrocytes attach to: | both A and C. neurons. blood vessels. |
| Schwann cells have a function in the PNS that is similar to that of which cells in the CNS? | Oligodendrocytes |
| A neuron that has only one axon but several dendrites is classified as a _____ neuron. | multipolar |
| Which of the following is the deepest connective tissue layer of a nerve? | Endoneurium |
| The white matter of the nervous system is made up of: | myelinated fibers. |
| Nerves that contain mostly afferent fibers are called _____ nerves. | sensory |
| The largest and most numerous types of neuroglia are the | astrocytes |
| Neurons in the CNS have less chance of regenerating for all of the following reasons except: | microglia lay down scar tissue. |
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