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 B
Explanation
B. The alveoli are tiny air sacs within the lungs where gas exchange occurs. Oxygen from inhaled air diffuses across the thin walls of the alveoli into the bloodstream, while carbon dioxide moves from the bloodstream into the alveoli to be exhaled.
A. The bronchi are the main airways that branch off from the trachea and lead to the lungs. While the bronchi play a crucial role in conducting air to and from the lungs, gas exchange does not occur in the bronchi themselves.
C. The nasal passages, also known as the nostrils or nares, are the passages through which air enters the respiratory system. While the nasal passages warm, humidify, and filter the air as it enters the body, gas exchange does not occur in this area.
D. The larynx, or voice box, is located at the top of the trachea and is involved in breathing, swallowing, and vocalization. However, gas exchange does not occur in the larynx.

Correct Answer is ["B","C","D","E"]
Explanation
B. Beta-blocking medications, such as propranolol and metoprolol, can worsen asthma symptoms in some individuals by constricting the airways. Patients with asthma should avoid or use caution with beta-blockers, especially non-selective ones, as they can trigger or exacerbate asthma attacks.
C. Exposure to secondhand smoke is a well-established trigger for asthma symptoms and can exacerbate respiratory inflammation and airway hyperresponsiveness. Patients with asthma should avoid exposure to secondhand smoke whenever possible to reduce the risk of asthma exacerbations.
D. Carpeting and drapes can harbor dust mites, pet dander, and other allergens that can trigger asthma symptoms in susceptible individuals. Patients with asthma may benefit from removing carpeting and minimizing soft furnishings in the bedroom to reduce exposure to allergens and improve air quality.
E. Pets, particularly those with fur or feathers, can be potent allergens for individuals with asthma. Patients with asthma should consider removing pets from the home or at least keeping them out of the bedroom to minimize exposure to pet dander.
A. Cardiovascular exercise can trigger asthma symptoms in some individuals but it is not typically recommended to eliminate exercise altogether. Instead, patients with asthma should be encouraged to engage in physical activities that are well-tolerated and to use appropriate preventive measures, such as pre-exercise bronchodilator therapy and warm-up exercises, to minimize symptoms.

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