The loss of functional surfactant raises surface tension in the alveoli, causing severe breathing problems. The combination of SP-B and SP-C dysfunction may explain why the signs and symptoms of SP-B deficiency are so severe.

What is caused by a lack of surfactant or insufficient amount of surfactant?

Deficiency of pulmonary surfactant due to immaturity is the principal cause of the respiratory distress syndrome (RDS) in premature infants.

What is the impact of surfactant deficiency on the respiratory system quizlet?

The lack of surfactant can increase surface tension and cause alveoli to collapse.

What decreases the production of surfactant?

Type II epithelial cell injury leads to a decrease in surfactant production, with resultant alveolar collapse.

How does surfactant reduce surface tension in alveoli?

Respiratory Failure Increased surface tension increases cohesion within the alveoli, pulling the alveoli closed. The alveolar cells produce a specialized liquid, surfactant, that decreases the surface tension in the airways reducing the amount of energy required to expand the lungs.

Does surfactant decrease surface tension?

The intermolecular forces between surfactant and water molecule are much lower than between two water molecules and thus surface tension will decrease. … The main purpose of the surfactants is to decrease the surface and interfacial tension and stabilize the interface.

Why the lack of surfactant would result in respiratory distress?

Surfactant enables the lungs to expand more easily. Without surfactant, the air sacs in the lungs, also called alveoli, collapse very easily. This collapse leads to decreased amounts of air in the lungs. The lack of surfactant combined with alveolar collapse makes it very difficult for the infant to breathe.

What change happens in the respiratory system as age progresses?

Changes to lung tissue: Muscles and other tissues that are near your airways may lose their ability to keep the airways completely open. This causes the airways to close easily. Aging also causes the air sacs to lose their shape and become baggy.

How does smoking affect the surfactant layer?

However, it is not clear what effect smoke has on the surfactant. Most studies have demonstrated that smoking reduces bronchoalveolar lavage phospholipid levels. Some components of smoke also appear to have a direct detergent-like effect on the surfactant while others appear to alter cycling or secretion.

Which describes the role of surfactant in the respiratory system?

The main function of surfactant is to lower the surface tension at the air/liquid interface within the alveoli of the lung. This is needed to lower the work of breathing and to prevent alveolar collapse at end-expiration.

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What change happens in the respiratory system as age progresses quizlet?

Age-related changes associated with the respiratory system include decreased gas exchange and diffusing capacity. Age-related changes associated with the cardiovascular system include increased blood pressure and decreased cardiac output.

What happens when surface tension decreases?

Conversely, as surface tension decreases strong; as molecules become more active with an increase in temperature becoming zero at its boiling point and vanishing at critical temperature. Adding chemicals to a liquid will change its surface tension characteristics.

How does surfactant prevent alveolar collapse?

Surfactant is released from the lung cells and spreads across the tissue that surrounds alveoli. This substance lowers surface tension, which keeps the alveoli from collapsing after exhalation and makes breathing easy.

How does surfactant affect airflow?

What effect does the addition of surfactant have on the airflow? AIrflow increases because resistance is reduced. Why does surfactant affect airflow? It decreases surface tension in the alveoli making it easier for the alveoli to increase surface area for gas exchange.

How does surfactant reduce the risk of RDS in infants?

Surfactant coats the insides of the air sacs, or alveoli, in the lungs. This helps keep the lungs open so breathing can occur after birth. To understand respiratory distress syndrome, it helps to learn about how the lungs work. Without enough surfactant, the lungs may collapse when the newborn exhales.

Why is surfactant important?

The main functions of surfactant are as follows: (1) lowering surface tension at the air–liquid interface and thus preventing alveolar collapse at end-expiration, (2) interacting with and subsequent killing of pathogens or preventing their dissemination, and (3) modulating immune responses.

What results from an insufficient production of surfactant in the pulmonary alveoli leading to alveolar collapse?

Respiratory distress syndrome (RDS)- also known as hyaline membrane disease. A disease of the newborn infants, especially premature infants. Results from an insufficient production of surfactant in the alveoli, leading to alveolar collapse.

Do surfactants lower surface energy?

Adding a surfactant to a coating or detergent lowers the surface tension of the liquid so it will flow more, covering the entirety of the surface.

How does surfactant reduce the surface tension of water in the lungs quizlet?

Surfactant reduces the surface tension exerted on the alveolus. It works by opposing the intermolecular attractive forces between the liquid molecules that line the alveoli.

How does surfactant help prevent alveoli collapse quizlet?

Surfactant reduces surface tension throughout the lung. It is also important because it stabilizes the alveoli. That is, at a constant surface tension, small alveoli will generate bigger pressures within them than will large alveoli.

How does smoking affect the water layer?

The Water layer is where oxygen diffuses through from alveoli into the capillary and where carbon dioxide diffuses from the capillary into the alveoli. The water layer is damaged with the introduction of nicotine and how much more work it takes for oxygen and carbon dioxide to diffuse to and from the capillaries.

How does smoking affect the water?

Cigarette butts cause pollution by being carried, as runoff, to drains and from there to rivers, beaches and oceans. Preliminary studies show that organic compounds (such as nicotine, pesticide residues and metal) seep from cigarette butts into aquatic ecosystems, becoming acutely toxic to fish and microorganisms.

Does smoking destroy cilia?

Other Respiratory Damage Caused by Smoking Cilia are tiny hair-like projections that protect the airways by sweeping away mucus and dust particles and keeping the lungs clear. Smoking damages and eventually destroys these cilia.

What changes occur to the bronchioles of the respiratory system because of aging?

The cartilage in the walls of the trachea and bronchi undergoes a progressive calcification causing them to become increasingly rigid with aging. These changes cause a gradual decrease in maximum breathing capacity. Additionally the walls of the alveoli deteriorate.

What happens when lungs lose elasticity?

Muscles like the diaphragm can get weaker. Lung tissue that helps keep your airways open can lose elasticity, which means your airways can get a little smaller. Also your rib cage bones can change and get smaller which leaves less room for your lungs to expand.

In what ways does aging affect the respiratory system and how does this affect your duties with older patients?

There are several body changes that happen as you get older that may cause a decline in lung capacity: Alveoli can lose their shape and become baggy. The diaphragm can, over time, become weaker, decreasing the ability to inhale and exhale. This change will only be significant when exercising.

What would happen if surfactant were not present?

When there is not enough surfactant, the tiny alveoli collapse with each breath. As the alveoli collapse, damaged cells collect in the airways. They further affect breathing. The baby has to work harder and harder to breathe trying to reinflate the collapsed airways.

What produces surfactant in the lungs?

The pulmonary surfactant is produced by the alveolar type-II (AT-II) cells of the lungs. It is essential for efficient exchange of gases and for maintaining the structural integrity of alveoli.

Which of the following changes in the respiratory system commonly occur in response to aging?

Alveolar surface area decreases. Diffusion capacity decreases. Bronchioles and alveolar ducts dilate. …

Which refers to the decrease in lens flexibility that occurs with age resulting in the near point of focus getting farther away?

Presbyopia is the gradual loss of your eyes’ ability to focus on nearby objects. It’s a natural, often annoying part of aging. Presbyopia usually becomes noticeable in your early to mid-40s and continues to worsen until around age 65.

What changes related to the aging process does the nurse expect in the respiratory system select all that apply?

Changes of aging include a decreased response to hypercapnia, decreased number of functional alveoli, and increased calcification of costal cartilage, but these do not increase the risk of aspiration.