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Stack #22194
Nervous System-Body Structure
| Question | Answer |
|---|---|
| The structures of the nervous system are divided into two | central and peripheral nerous sytem |
| the structures of the nervous system | central and peripheral |
| What are the three general functions of the nervous system | a sensory function, an integrative function and a motor function |
| The nerve glue | neuroglia |
| What is the most abundant of the nerve cells | neuroglia |
| What are the functions of the glia cells | protect, insulate, nourish, and generally care for the delicate neurons |
| the two common glia cells | astrocytes and ependymal cells |
| the three parts of a neuron | dentrites, cell body and axon terminals |
| nerve fibers are encased by | myelin sheath |
| The functions of the myelin sheath | protection and insulation |
| This neuron carries information from the periphery toward the CNS | sensory |
| this neuron carries information from the CNS toward the periphery | motor |
| What neuron is found only in the CNS | interneuron |
| An electrical signal that conveys information along a neuron | nerve impulse |
| The nerve impulse is also called | action potential |
| What three processes are included in the action potential | polarization, depolarization, and repolarization |
| Characterized the resting state of the neuron | polarization |
| The process of changing the electrically state, during stimulation | depolarization |
| Returning to the neuron's resting state | repolarization |
| the chief intracellular ion in the neuron | potassium |
| The chief extracellular ion in a neuron | sodium |
| The "jumping from one node to another in a nerve impulse | saltatory conduction |
| A junction, or space, between two neurons | synapse |
| tiny vesticles that store chemical substances | neurotransmitters |
| The brain is divided into four major areas | cerebrum, diencephalon, the brain stem, and the cerebellum |
| the largest part of the brain | cerebrum |
| The motor speech area | Broca's area |
| The thalamus is located in the brain | diencephalon |
| the pons is located in the brain | brain stem |
| What brain lobe contains the olfactory area | temporal |
| What lobe of the brain is the sensation of temperature,pain, light touch located | parietal lobe |
| The "emotional brain" | Limbic system |
| Dreaming occurs in what stage of sleep | REM |
| The "hard mother" | dura mater |
| the arrangement of cells that selects the substances allowed to enter the CNS from the blood | blood-brain barrier |
| What type of nerve tract carries information from the periphery, up to the spinal cord | sensory tracts |
| the major motor tract | pyramidal tract |
| An involuntary response to a stimulus | reflex |
| The spinal cord serves three major functions (pathways) | sensory pathways, motor pathways and reflex center |
| The four basic components of the reflex arc | receptor, afferent neuron, efferent neuron, effector organ |
| Cranial nerve concern with sense of smell | olfactory |
| Cranial nerve concern with movement of the eyeball | trochlear,abducens |
| Cranial nerve associated with speech and swallowing | hypoglossal |
| The three spinal nerve plexuses | cervical, brachial, and lumbosaral plexuses |
| Results of damage to the phrenic nerve | impaired breathing |
| Results of damage to the axillary nerve | crutch palse |
| The autonomic nervous sytem is divided into two systems | sympathetic, and parasympathetic |
| What autonomic nervous system involves increased heart rate and strengh of contraction | sympathetic response |
| What autonomic nervous system constricts the pupil | parasympathetic response |
| The "feed and breed" system | parasympathetic nervous system |
Created by:
katyrn
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