Answer:
Surfactant is a liquid produced by the alveoli in the lungs to keep the lungs from collapsing.
Explanation:
Surfactant is a fluid composed of lipids and proteins produced in the lungs that keeps the airways open and prevent the lung from collapsing. It is secreted by the alveolar epithelial type-II (AT-II) cells of the tiny air sacs found in the lungs called alveoli. It prevents the collapse of alveoli under the surface tension by reducing the surface tension at the interface between air and the aqueous fluid lining the alveolar surfaces. If enough surfactant is not present, the surface tension causes the tissue surrounding the alveoli to stick together after each exhalation and results in the collapse of alveoli.
Usually, in unborn babies, the production of surfactant starts at about 6 months of pregnancy and the surfactant helps the babies to breathe in the air immediately after delivery. But a premature baby can not produce enough surfactant and it results in the collapse of alveoli with each breath. The damaged alveolar cells collected in the airways affect breathing and the baby takes in less oxygen. This disorder is known as respiratory distress syndrome (RDS).
The level of carbon dioxide in the blood increases and results in acidosis which affects other organs in the body. Since the premature babies having RDS need extra oxygen and help with breathing, the treatment methods include providing extra oxygen through CPAP, placing a breathing tube into your baby's trachea, providing artificial surfactant and ventilator support.
Answer: One kind of evidence that supports Wegener's hypothesis is that: fossils of the same organism have been found on different continents Based on this finding, we can draw a conclusion that million years ago, all the lands on the face of the earth were not separated by sea so the animals could migrate from one continent to
Answer:
The correct answer is "a supervision duty for a RDA".
Explanation:
According to the California Dental Practice Act, RDA establishes all the duties that a dental assistant is able to perform. These duties are limited, since they do not have the background and abilities that a dentist have during his career. However, a dental assistant could still perform many duties, including: mouthmirror inspection of the oral cavity and charting of obvious lesions.
Answer:
The correct answer will be - ATP synthase
Explanation:
The enzyme which synthesizes the process of ATP synthesis as a result of oxidative phosphorylation is known as ATP synthase.
Since oxidative phosphorylation takes place in the mitochondria therefore, the enzyme is present in the inner mitochondrial membrane.
The enzyme synthesizes ATP by catalyzing the transformation of ADP to ATP using the energy provided the flux of protons caused by the oxidative phosphorylation. The flux takes place through tube-like the structure of ATP synthase composed of CF₀ unit and CF₁ facing matrix of the mitochondria.
Thus, ATP synthase is the correct answer.