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
By now you know that diabetes cannot be cured but can be treated so that an individual leads a normal life. Patients who maintain their blood glucose levels within the normal range

Q. How does the depolarization of the neuronal membrane start? The primary cause of the neuronal depolarization is the binding of neurotransmitters released in the synapse by t

Enumerate about the Mycotic Infections Invasion of the nervous system by a fungus is known as a mycotic infection. A fungus is any member of a large group of lower plants (in s

Define Theophrastus of Eresus - Taxonomy The Father of Botany (370-285 B.C.); of all the men who ever lived upon the earth certainly one of the most remarkable was Theophrastu


Define Types of Root Canal Perforations According to the time of treatment According to the time of treatment in relation to occurrence: Fresh perforation: treated immed

how is biotechnology useful?

What is Coelom - Body Cavity explain? Among the bilaterally symmetrical organisms, animals have three different types of body plans with respect to body cavities. The term coel

Q. Explain Left Ventricle Enlargement? The left ventricle (LV) is ellipsoid in shape. It lies behind, and to the left of the right ventricle. Its long axis lies at about 45 deg

A protein that is normally a single-pass transmembrane protein is absent from the cell surface of the mutant cell line YTM-15. When labeled so that the protein can be localized, yo