The respiratory distress that accompanies emphysema is caused by:<\/p>\n\n\n\n
a) repeated exposure to cigarette smoke.
b) chronic stretching of the alveolar walls.
c) massive constriction of the bronchioles.
d) acute fluid accumulation in the alveoli.<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n Correct Answer: b) chronic stretching of the alveolar walls.<\/strong><\/p>\n\n\n\n Emphysema is a type of chronic obstructive pulmonary disease (COPD) characterized primarily by chronic damage and irreversible enlargement of the alveoli<\/strong> (the small air sacs in the lungs where gas exchange occurs). This damage is largely due to the chronic stretching and destruction of alveolar walls<\/strong>, making option b<\/strong> the correct answer.<\/p>\n\n\n\n In a healthy lung, alveoli are elastic structures that expand and recoil during inhalation and exhalation. In emphysema, proteolytic enzymes like elastase<\/strong>\u2014often released in response to chronic irritation (especially from cigarette smoke<\/strong>)\u2014gradually break down the elastic fibers of the alveolar walls. This leads to the loss of surface area<\/strong> for gas exchange and reduced elastic recoil<\/strong>, which makes it extremely difficult for the patient to exhale air efficiently.<\/p>\n\n\n\n As the alveolar walls become damaged and coalesce into larger, less efficient air spaces, air becomes trapped in the lungs<\/strong>, leading to hyperinflation. The lungs become less compliant, and the diaphragm flattens, further impairing the mechanics of breathing. This contributes significantly to respiratory distress<\/strong>, as the body struggles to eliminate carbon dioxide and obtain sufficient oxygen.<\/p>\n\n\n\n Although cigarette smoke (option a)<\/strong> is a major risk factor<\/strong> for emphysema, it is not the direct cause of the respiratory distress<\/strong>\u2014rather, it initiates the process that eventually leads to chronic alveolar wall destruction<\/strong>.<\/p>\n\n\n\n Option c<\/strong>, massive constriction of bronchioles, is more characteristic of asthma<\/strong>, not emphysema.<\/p>\n\n\n\n Option d<\/strong>, acute fluid accumulation in the alveoli, describes pulmonary edema<\/strong>, commonly seen in left-sided heart failure<\/strong>, not emphysema.<\/p>\n\n\n\n In conclusion, the respiratory distress in emphysema<\/strong> is due to chronic stretching and destruction of alveolar walls<\/strong>, leading to air trapping<\/strong>, inefficient gas exchange<\/strong>, and difficulty exhaling<\/strong>, all of which progressively impair respiratory function.<\/p>\n","protected":false},"excerpt":{"rendered":" The respiratory distress that accompanies emphysema is caused by: a) repeated exposure to cigarette smoke.b) chronic stretching of the alveolar walls.c) massive constriction of the bronchioles.d) acute fluid accumulation in the alveoli. The Correct Answer and Explanation is: Correct Answer: b) chronic stretching of the alveolar walls. Explanation: Emphysema is a type of chronic obstructive […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-215547","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=215547"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215547\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=215547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=215547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=215547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n