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nervous system
study for chapter 8 nervous system
| Question | Answer |
|---|---|
| Thalmus function | superior to hypothalmus and inferior to cerebrum. controls sensory impulses (except smell.) |
| Frontal lobe function | voluntary movement motor area to control movement |
| effects of sympathetic response | dominate in stressful situations, heart rate increases, vasodilation in skeletal muscles, bronchioles dialate, liver changes glycogen to glucose, digestive secretions decrease, peristalsis slows, vasoconstriction in skin |
| neurotransmitters | enables nerve impulses to cross synapses |
| cranial nerve I | olfactory-smell |
| cranial nerve II | optic-sight |
| cranial nerve III | Oculometer-movement of eyeball |
| cranial nerve IV | trochler-movement of eyeball |
| cranial nerve V | trigreminal-sensation in face, scalp, and teeth, contraction of chewing muscles |
| cranial nerve VI | abducens-movement of eyeball |
| cranial nerve VII | facial-sense of taste, contraction of facial muscles, secretion of saliva |
| cranial nerve VIII | acoustic or vestibulocohlear- hearing or equilibrim |
| cranial nerve IX | glossopharyngeal- sense of taste, sensory for cardiac, respiratory, bp reflexes, contraction of pharynx, secretion of saliva |
| cranial nerve X | vagus-sensory in cardiac, respiratory, bp reflexes, sensory and motor to larynx, decreases heart rate, contraction of alimentary tube, increases digestive secretions |
| cranial nerve XI | accessory- contraction of neck and motor to larynx (speaking) |
| cranial nerve XII | hypoglossal- movement of tongue |
| cerebrum function | movement, sensation, learning, memory |
| function of nervous system | to detect change and feel sensation, initiate appropriate responses to change, organize info for immediate use and store for future use |
| neuron anatomy | cell body, dedrites, axon, schwann cells, myelin sheath, neurolemma |
| interneuron | entirely within the cns- carries only sensory or motor impulses or to integrate these functions |
| reflex arc | pathway nerve impulses travel when a reflex is elicited |
| 5 essential parts of a reflex arc | receptors, sensory neurons, cns,motor neurons, effector |
| outermost layer of meninges | fibrous connective tissue called dura mater |
| connection for the cerebral hemisphere | corpus callosum-band of nerve fibers that connects right and left cerebral hemisphere |
| cerebrum lobes | frontal,parietal,temporal,occipital |
| frontal lobes | voluntary movement |
| parietal lobes | sensory |
| temporal | smell |
| occipital | visual , thinking |
| myelin producing cells | schwann cells, oligodendrocytes,neuroglia(glia cells) microglia, astrocyte |
| blood brain barrier | prevents potentially harmful waste products in the blood from diffusing out in to brain tissue |
| synaptic transmission | small gap or pace between the axon and neuron and the dendrites or cell body of the next neuron is the synapse. transmission is carried from 1 to the next by neurotransmitter . a chemical inactivator is use to prevent unwanted continuous impulses |
| Nueron insulator | schwann cells,myelin sheaths |
| cerebellum function | movement |
| neuron efferent | sensory |
| neuron afferent | motor |
| chemical impulse occurs at | synapse |
| electrical impulse occurs at | neurons |
| white matter | made of myelinated axons and dendrites of interneurons |
| cerebral spinal fluid and anatomy | in the central canal and is continuous with cavities in the brain called ventricles. works as an insulator |
| division of nervous systems | central, peripheral(including autonomic) |
| mixed nerve | contains both sensory and motor neurons. most of peripheral nerves are mixed nerves(sciatic) |
| patellar reflex | knee jerk-tap on patellar tendon just below the knee cap causes extension of the lower leg. this is a stretch reflex |
| thalmus | is superior to the hypothalmus and inferior to the cerebrum. the third ventricle is a narrow cavity that passes through both thalmus and hypothalmus. functions are concerned with sensation. |
| frontal lobe function | motor area that generates impulses for voluntary movement of hands and face. |
Created by:
kim19smith66
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