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
Determine Effects of probiotics on Animals? Let us briefly examine the effects that have been reported (remember most of it has been on animals): 1. In animals, probio

Determine the categories of Latent squint Latent squint category there are five subtypes: 1)  Esophoria 2)  Exophoria 3)  Hypophoria 4)  Hyperphoria 5)  Cyclopho

Q. What are the effects of somatostatin for the pancreatic hormonal secretion? Somatostatin inhibits both glucagon and insulin secretions.

Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the histidine operon.

Importance of water in the body Water is the most essential constituent of life. Life cannot exist without water. About 90% of water is present in protoplasm  Water

Define Dietary Management of Cancer Patients and Feeding Problems Related To Cancer Therapy? We took an overview about the general nutritional requirements of cancer patients.

The DNA of a bacterial cell,such as Escherichia coli is a circular double-stranded molecule  often  referred  to as the bacterial  chromosome.  The circular  DNA  is packaged into

Which of the following is not a difference among DNA primase and DNA polymerase? A. DNA primase can initiate replication of DNA de novo whereas DNA polymerase needs a short oli

Explain the Nutritional Changes and Requirement - Geriatric Nutrition? Nutrition is affected in two way -due to the changes in physiological function with  aging having effect

Briefly describe the principal lines of defence against bacteria entering the blood system. A blood clot forms a barrier to entry by bacteria. White cells ingest and kill bacte