Signs and symptoms of emphysema, Biology

Pathophysiology

Distension and damage of the respiratory bronchioles selectively occur. Opening develops in the walls of the bronchioles. and they become enlarged and confluent and tend to from a single space as the walls enlarge. Distribution is uneven but more severe in upper portions in centrilobular emphysema (CLE). In panlobular Emphysema (PLE) more uniform enlargement and destruction of alveoli, more diffuse and more severe in lower lung.

Signs and Symptoms 

Increased lung compliance, loss of elastic recoil resulting firm destruction of elastin in lung parenchyma causes the lungs to become permanently distended. Increased airway resistance. Distribution of elastic lung tissue causes the small airway to either collapse or narrow particularly during expiration. Thus, air becomes trapped in the distal airspaces. More pressure on diaphragm from distended lungs, so more use of accessory muscles to force the trapped air out of lungs leading to intra pleural pressure that increases the airway collapse. Altered 02/C02 exchange.

Posted Date: 11/4/2012 11:48:13 PM | Location : United States







Related Discussions:- Signs and symptoms of emphysema, Assignment Help, Ask Question on Signs and symptoms of emphysema, Get Answer, Expert's Help, Signs and symptoms of emphysema Discussions

Write discussion on Signs and symptoms of emphysema
Your posts are moderated
Related Questions
Dominance In each community, a few over topping species are present in greater bulk. By their greater number or biomass (living weight) the dominant species modify the habitat

llustrate the role of each area in the evolution of the Hebe Uses appropriate examples from the Hebe data to illustrate the role of each area/concept in the evolution of the He

Q. How different are pteridophytes from bryophytes regarding substance transport? Pteridophytes are tracheophyte (vascular) plants that are they have tissues specialized in con

ALIMEN T A R Y CANAL Endodermal in origin. Long, 6-9 metres. In herbivorous more long than carnivorous.

If molecules diffuse down their concentration gradient and achieve equal concentration throughout a container or cell, does all movement stop? Explain your answer.

are viruses cellular organisms

explain in detail various types of epithelial tissue

Define Etiology and Clinical Features of Epilepsy? This disorder usually starts in childhood, with the peak incidence between birth and two years. Etiological factors include

Treatment   Most cases of diarrhoea do not need antibiotic therapy as the bacterial or parasitic organism are not isolated from most of the cases. However chemotherapeutics  ar

ae there non-parasitic viruses?