anatomy chapter 7 – Flashcards
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Which term refers to the conscious control of skeletal muscles?
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somatic nervous system
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What type of neuroglial cell is the most abundant in the CNS?
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astrocytes
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Which of these is a unipolar neuron?
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sensory neuron
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Which of the following is the second component in a reflex arc?
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afferent neuron
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In what part of the brain is the motor map located?
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frontal lobe of the cerebral hemispheres
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Where does CSF originate?
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brain ventricles
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What type of neurons are located in the ventral horns of gray matter of the spinal cord?
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motor neurons
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What cranial nerve pair supplies many organs in the ventral body cavity?
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vagus nerves
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Which of these is stimulated by parasympathetic nerves?
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stomach activity
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What is the functional classification for voluntary nerves?
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somatic motor
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To which structural class of the nervous system do autonomic nerves belong?
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peripheral nervous system
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What cells of the nervous system are responsible for anchoring neurons to their blood vessels and controlling the extracellular fluid concentrations of potassium and neurotransmitters?
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astrocytes
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What part of a neuron attaches the cell body to the axon?
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hillock
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What functional classification do all unipolar neurons belong in?
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afferent
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What is the first event of an action potential?
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Sodium ions diffuse rapidly and the membrane depolarizes.
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Which of these lists the components of a reflex arc in the correct sequence?
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receptor; afferent neuron; control center; efferent neuron; effector
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Name this type of supporting cell found in nervous tissue.
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Ependymal cells possess cilia to help circulate cerebrospinal fluid in the central cavities of the brain and spinal cord.
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Name the cell that forms the myelin sheath on this motor neuron
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Schwann cell myelinate the axons of neurons found outside the CNS
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Meissner's corpuscle
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touch recptors; mechenical energy to electrical current; nerve ending; sensitive to (light touch, fine touch), upper part of dermis
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Which of these parts of the brain is correctly matched with its region?
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thalamus; diencephalon
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What structure produces cerebrospinal fluid?
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choroid plexus
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Which of these is part of the spinal cord?
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dorsal horn
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Which cranial nerves control movement of the eyes?
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oculomotor, trochlear, and abducens
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Which spinal plexus gives rise to the phrenic nerve, and what organ does this nerve supply?
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cervical; diaphragm
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What part of the CNS gives rise to sympathetic nerves?
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thoracic and lumbar regions of the spinal cord
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Which of these is a parasympathetic effect?
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acetylcholine slows the heart
