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Bio 120 Ch 15
The Respiratory System
| Question | Answer |
|---|---|
| Inhaled air is first warmed by the | nasal musoca |
| The bones the increase the surface of the nasal mucosa are the | conchae |
| The nasopharynx is located behind | nasal cavities |
| The nasopharynx is lined with epithelium | ciliated |
| The oropharynx is located behind the | mouth |
| The oropharynx is lined with epithelium | stratified squamous |
| The laryngopharynx opens into the | larynx and esophagus |
| The part of the pharynx that is an air passageway only is the | nasopharynx |
| The parts of the pharynx that are passageways for both air and food are | oropharynx and the laryngopharynx |
| During swallowing the nasopharynx is covered by the | soft palate |
| The function of the soft palate is to cover the during | nasopharynx, swallowing |
| During swallowing the larynx is covered by the | epiglottis |
| The function epiglottis is to cover the during | larynx, swallowing |
| The palatine tonsils are tissue | lymphatic |
| The palatine tonsils are on the lateral walls of the | oropharynx |
| The adenoid is tissue | lymphatic |
| The adenoid is lymphatic tissue on the wall of the | nasopharynx |
| The general purpose of the tonsils is to | destroy pathogens |
| Coming from the middle ear cavities, the open into the nasopharynx | eustachian tubes |
| The airway of the larynx is lined with epithelial tissue | ciliated |
| The trachea is lined with epithelial tissue | ciliated |
| Mucus and pathogens are swept out of the larynx and trachea by | ciliated epithelial tissue |
| The larynx is an passage way between the | laryngopharynx and the trachea |
| The larynx contains vocal cords, folds that vibrate when air is | exhaled |
| For most people, the speech areas are in the of the cerebrum | left hemisphere |
| The airway of the larynx is kept open by | cartilage |
| The trachea is kept open by | cartilage |
| The trachea is kept open by cartilage shape of a | C |
| The tissue that keeps the larynx and trachea open is | cartilage |
| The trachea extends from the to the | larynx, primary bronchi |
| The trachea and all the respiratory passages are collectively called the | bronchial tree |
| The bronchioles differ from the bronchi in that there are no in their walls and they may | cartilage, close |
| The bronchioles can constrict or dilate because of the tissue in their walls | smooth muscle |
| The right bronchus branches into secondary bronchi | three |
| The left primary bronchus branches into | two |
| The serous membrane that lines the chest cavity is the | parietal pleura |
| The serous membrane the covers the lungs is the | visceral pleura |
| The pleura covers the lungs | visceral |
| The pleura lines the chest cavity | parietal |
| During breathing, friction between the pleural membranes is reduces by | serous fluid |
| The functions of the serous fluid of the pleural membranes is to prevent during | friction, breathing |
| The alveoli and the pulmonary capillaries are all made of | simple squamous epithelial |
| Exchange of gases is possible in the lungs because the alveoli are lined with in which gasses can desolve | tissue fluid |
| Normal inflation of alveoli is possible because decreases the surface tension within alveoli | pulmonary surfactant |
| Pulmonary surfactant permits normal inhalation because it decreases the within alveoli | surface tension |
| All of the structures and substance through which gasses diffuse in the lungs are collectively called the | respiratory membrane |
| The diaphragm is made of muscle | skeletal |
| During inhalation the diaphragm moves | downward |
| The diaphragm during inhalation | contracts |
| The diaphragm during exhalation | relaxes |
| During exhalation the diaphragm moves | upward |
| The diaphragm contracts during | inhalation |
| The diaphragm relaxes during | exhalation |
| During inhalation the chest cavity is expanded top to bottom be the contraction of the | didphragm |
| The external intercostal muscles contribute to by pulling the ribs | inhalation, up and out |
| The ribs are pulled up and out by the | external intercostal |
| The internal intercostal muscles contribute to a | forced inhalation |
| A forced exhalation requires muscles | internal intercostal |
| The muscles that bring about inhalation are the muscles | diaphragm |
| The elastic connective tissue of the lungs contributes to | exhalation |
| Normal exhalation is a passive process and depends on the tissue of the lungs | elastic connective |
| The air pressure outside the body is called pressure | atmospheric pressure |
| The air pressure within the bronchial tree is called | intrapulmonic pressure |
| During inhalation, intrapulmonic pressure | decreases |
| During exhalation, intrapulmonic pressure | increases |
| In external respiration oxygen diffuses from the | alveoli |
| In external respiration carbon dioxide diffuses from the | blood |
| During breathing the pleural membranes are kept together by the presence of | serous fluid |
| The partial pressure of a gas in air or a body fluid is a measure of the of the gas | consentration |
| In internal respiration oxygen from the to the | blood, tissue |
| In internal respiration carbon dioxide diffuses form the to the blood | tissue, blood |
| In internal respiration the PO2 in the blood is | high |
| In internal respiration the PO2 in the tissue is | low |
| In internal respiration the PCO2 in the blood is | low |
| In internal respiration the PCO2 in the tissues is | high |
| Most oxygen is transported to tissues bonded on the | hemoglobin |
| Most oxygen is transported t tissues bonded to the hemoglobin in | red blood cells |
| The mineral that is essential for oxygen transport is | iron |
| because it is part of | hemoglobin |
| Oxygen is released from hemoglobin to tissues where the P is low and the P is high | O2, CO2 |
| Most carbon dioxide is transported in hte blood in the form of in the | bicarbonate ions, plasma |
| Bicarbonate ions are in the plasma are the form of blood transport of | carbon dioxide |
| The CNS respiration centers are located in the and | medulla, pons |
| The inspiration and expiration centers are located in the | medulla of the brain |
| The apneustic and pneumotaxic centers are located in the | pons of the brain |
| The nerve impulses that stimulate contractions of the respiratory muscles come form the ________ centers in the ________ | inspiratory, medulla |
| The _________ nerves are motor to the diaphragm | phernic |
| The phrenic nerves carry motor impulses to the | diaphragm |
| The functions of the apneustic center is to | prolong inhalation |
| The function of the pneumotaxic center is to help bring about | exhalation |
| The strongest stimulus to increase the breathing rate is a ________ level of ______ in the blood | higher, carbon dioxide |
| The strongest stimulus to increase the breathing rate is a higher level of _______ in the blood because this makes the blood more __________ | carbon dioxide, acidic |
| The strongest stimulus to increase the breathing rate is a higher level of ___________ in the blood because this will __________ the pH of the blood | Carbon dioxide, decrease |
| The chemoreceptors that detect a decrease in the blood oxygen level are located in the __________ and the _________ | carotid body, aortic body |
| The carotid and aortic bodies contain _________ that detect decreases in the blood ________ level | chemoreceptors, oxygen |
| The chemoreceptors that most rapidly detect an increase in the blood CO2 level are located in the | medulla |
| The medulla contains the chemoreceptors that most rapidly detect increases in the blood level of the | carbon dioxide |
| Hypoxia is the stimulus for the breathing rate to ________ in order to _______ | increase, inhale more oxygen |
| An elevated blood CO2 level is a stimulus for the breathing rate to________ in order to_________ | increase, exhale more CO2 |
| The nasal mucosa is made of _________ epithelial tissue | ciliated |
| The nasal mucosa is __________ epithelial tissue with goblet cells that secrete _________ | ciliated, mucus |
| Two functions of the nasal mucosa are to ________ the incoming air and add _________ | warm. moisture |
| The general cause of respiratory acidosis ia a __________ in breathing rate or efficienct that result in ________ CO2 in the body | decrease, more |
| The general cause of respiratory alkalosis is a _________ in breathing rate that results in __________ CO2 in the body | increase. less |
| A severe respiratory acidosis cause the blood pH to fall below | 7.35 |
| A severe respiratory alkalosis will cause the blood pH to rise above | 7.45 |
| patient who is anxious and hyperventilating may also be in a pH state of respiratory | alkalosis |
| A patient with severe emphysema will also be in a state of reapiratory | acidosis |
| To compensate for the metabolic acidosis the respiratory rate will _______ in order to _________ more carbon dioxide | increase, exhale |
| To compensate for a metabolic acidosis the respiratory rate will _______ in order to______ more carbon dioxide and ________ the blood pH | increase, exhale, raise |
| To compensate for a metabolic alkalosis the respiratory rate will _______ in order to ________ more carbon dioxide | decrease, retain |
| To compensate for a metabolic alkalosis the respiratory rate will ________ in order to _________ more carbon and ________ the blood pH | decrease, retain, lower |
| The limit of respiratory compensation for an ongoing metabolic pH inbalance is approximately | 75% |