Generate Quiz 68CA84E6864FA

The right response, in short, is “a) Dorsal.” The dorsal (back) portion of the brainstem contains the medulla’s expiratory center. The expiratory center’s location is not accurately represented by the other options.

The infectious viral infection known as “acute bronchitis” results in inflammation of the bronchial tubes, which are the airways that supply air to your lungs. These tubes swell and develop mucus, or thick fluid, when they become infected. Breathing becomes more difficult as a result of the airways becoming narrowed. However, its effects are reversible, and it lasts for a few weeks. Option A is therefore accurate.

The complex known as lung surfactant has a distinct protein and phospholipid makeup. Reducing surface tension at the pulmonary air-liquid interface is its specific purpose.

Nicotine and tar, which are found in tobacco cigarettes, are carcinogenic. Carcinogens are substances that cause cancer. The most common and wide spread cause for lung cancer is smoking. The biggest risk factor for lung cancer is smoking, particularly among young adults. Smokers and those who live in smoky areas have ten times the risk of developing lung cancer compared to nonsmokers. According to current estimates, smoking causes 90% of lung cancer cases.

A layer of skeletal muscle called the diaphragm divides the abdominal and thoracic cavities.

The pleural fluid that sits between the pleural membranes, which cover the lungs, lubricates them and guards against friction-induced damage.

The nasal cavities on the face are accessed through the nostrils. The nasal cavities of the nose are connected to these air-filled pockets.

The protein hemoglobin (Hb) is conjugated. It is composed of a nonprotein group called heme that is joined to a basic protein called globin. Heme is a ring of iron porphyrin. Four heme molecules joined with four globin molecules form the complex known as a mammalian Hb molecule. It is found in red blood cells and transports oxygen from the lungs to the tissues as well as carbon dioxide from the tissues back to the lungs.