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Anatomy Week 7 Quiz
| Question | Answer |
|---|---|
| Fascicles are held together by a connective tissue layer called the | Perineurium |
| Along a neuron, the correct pathway for impulse conduction is: | dendrite, cell body, axon |
| Small distinct regions of gray matter in the CNS are called: | nuclei |
| Neurons in the CNS have less chance of regenerating for all of the following reasons except: | Microglia lay down scar tissue. (There is no neurolemma in cells of the CNS and astrocytes fill in the path of regrowth.) |
| Nerves that contain mostly afferent fibers are called _______ nerves. | Sensory |
| The nervous system is organized to do which of the following? | Detect changes in the external environment, detect changes in the internal environment, evaluate changes in the environment. (all) |
| 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: | according to its structure, according to its direction of information flow, by control of effectors. (all) |
| Which is not true of the myelin sheath? | It covers cell bodies in the brain and spinal cord. (It is associated with fibers in the brain, it is important for nerve impulse conduction, it is destroyed in those with multiple sclerosis.) |
| Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have: | a neurilemma |
| A neuron that has only one axon but several dendrites is classified as a _____ neuron | multipolar |
| One of the components of the blood-brain barrier is: | astrocytes |
| Which of the following is not a function of the central nervous system (CNS)? | Integrating sensory information, evaluating the information, initiating an outgoing response. (all) |
| Schwann cells have a function in the PNS that is similar to that of which cells in the CNS? | Oligodendrocytes |
| The afferent pathways of the autonomic nervous system: | carry feedback information to integrating centers in the brain. |
| The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: | Somatic Nervous System |
| Gray matter in the brain and spinal cord consists primarily of: | Cell Bodies |
| The largest and most numerous types of neuroglia are the: | astrocytes |
| Astrocytes attach to: | neurons and blood vessels |
| Which of the following compounds cannot cross the blood-brain barrier? | Dopamine |
| Interneurons reside in the: | CNS only |
| In the human nervous system: | there are almost equal numbers of glia cells and neurons. |
| Multipolar neurons have: | multiple dendrites and one axon |
| Which is true of a reflex arc? | It always consists of an afferent neuron and an efferent neuron. |
| The white matter of the nervous system is made up of: | myelinated fibers |
| Most unipolar neurons are usually: | sensory neurons |
| Which of the following is the deepest connective tissue layer of a nerve? | Endoneurium |
| The efferent pathways of the autonomic nervous system consist of the ________ nervous systems. | sympathetic and parasympathetic |
| The autonomic nervous system does not stimulate: | Skeletal muscles; it does stimulate smooth muscles, glands, and cardiac muscle. |
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Janelleu4771
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