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 C
Explanation
C. The spacer helps to deliver more medication to the lungs by holding the medication in the chamber, allowing the patient to inhale it more slowly and deeply. This results in better deposition of the medication in the lower airways and reduces the amount of medication that is deposited in the mouth and throat.
A. The primary purpose of the spacer is to increase the amount of medication that reaches the lungs and to reduce the amount deposited in the oropharynx (throat). The spacer helps to ensure that more medication is delivered directly to the airways where it is needed, thereby enhancing the effectiveness of the treatment and reducing side effects.
B. The exhalation slots or vents on a spacer are designed to allow the patient to exhale easily without removing the device from the mouth. The lips should form a tight seal around the mouthpiece of the spacer to ensure effective inhalation, but the exhalation slots should not be intentionally covered.
D. When using a spacer with an MDI, the patient should inhale slowly and deeply. Rapid inhalation can cause the medication to be deposited in the upper airways rather than reaching the lungs. A slow and deep inhalation allows for better medication delivery to the lower airways.
Correct Answer is D
Explanation
D. Sucralfate should be taken on an empty stomach, typically 1 hour before meals. This timing allows the medication to coat the ulcer site effectively and protect it from the acidic environment of the stomach, which increases after eating.
A. Taking sucralfate with an antacid can interfere with its action. Sucralfate works by forming a protective barrier on the ulcer site, and antacids can prevent sucralfate from binding properly to the ulcer. It's generally recommended to take sucralfate at least 30 minutes before or after antacids.
B. Sucralfate is not taken on an "as needed" basis for pain relief. It is prescribed as a regular, scheduled medication to provide continuous protection of the ulcer site. Pain relief from peptic ulcers comes as the ulcer heals, which sucralfate aids by protecting the mucosal lining.
C. Sucralfate does not need to be stored in the refrigerator. It should be stored at room temperature, away from moisture and heat, according to standard storage guidelines for most medications.
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