What type of cells secrete glucagon?
Plasma cells
Acinar cells
Beta cells
Alpha cells
The Correct Answer is D
D. Alpha cells, also known as A cells, are a type of pancreatic islet cell (or islet of Langerhans cell) that secretes glucagon. Glucagon plays a crucial role in increasing blood sugar levels by promoting the breakdown of glycogen in the liver and stimulating the release of glucose into the bloodstream.
A. Plasma cells are a type of white blood cell that produces antibodies as part of the immune response. They are not involved in the production of glucagon.
B. Acinar cells are exocrine cells found in the pancreas that secrete digestive enzymes into the pancreatic ducts. These enzymes aid in the digestion of food in the small intestine. Acinar cells are not involved in the production of glucagon.
C. Beta cells are another type of cell in the pancreas, but they secrete insulin, not glucagon. Insulin is responsible for lowering blood sugar levels by promoting the uptake of glucose into cells for energy or storage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","E"]
Explanation
A. Diminished breath sounds can occur in emphysema due to decreased air movement through damaged and enlarged air sacs (alveoli). The destruction of alveolar walls reduces the surface area available for gas exchange and can result in decreased breath sounds.
C. Patients with emphysema may use accessory muscles, such as neck and shoulder muscles, to assist with breathing during periods of respiratory distress. These muscles are recruited to help increase the size of the thoracic cavity and improve airflow.
E. A barrel-shaped chest is a common physical finding in patients with emphysema. It results from hyperinflation of the lungs and is characterized by an increased anterior-posterior diameter of the chest. This change in chest shape is due to air trapping in the lungs, leading to overinflation of the alveoli and increased residual volume.
B. Ruddy skin color, which refers to a reddish or flushed complexion, is not typically associated with emphysema. Instead, patients with emphysema may exhibit cyanosis (bluish discoloration of the skin) during periods of hypoxemia (low oxygen levels).
D. Excess mucus production (mucus hypersecretion) is a characteristic feature of chronic bronchitis, which is often present alongside emphysema in chronic obstructive pulmonary disease (COPD) but it is not typically a primary feature of emphysema itself.
Correct Answer is B
Explanation
B. Orange juice is highly acidic and can irritate the esophagus, leading to increased heartburn symptoms. Regular consumption of acidic beverages like orange juice can exacerbate GERD symptoms, making this a likely contributing factor to the client's heartburn.
A. Consuming low-fat meats is generally not a contributing factor to heartburn. Low-fat meats are less likely to cause reflux compared to high-fat foods, which can relax the lower esophageal sphincter and increase the risk of acid reflux.
C. Eating dinner early in the evening is generally recommended for managing GERD. This practice allows more time for the stomach to empty before lying down to sleep, reducing the likelihood of acid reflux during the night.
D. Sleeping on a large wedge-style pillow is also generally recommended for managing GERD. Elevating the head and upper body during sleep can help prevent acid from flowing back into the esophagus.
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