What type of cells secrete insulin?
Alpha cells
Beta cells
Acinar cells
Plasma cells
The Correct Answer is B
B. Beta cells are the pancreatic cells responsible for secreting insulin. Insulin acts to lower blood sugar levels by facilitating the uptake of glucose into cells for energy or storage. In individuals with diabetes mellitus, dysfunction of beta cells can lead to inadequate insulin secretion, resulting in high blood sugar levels.
A. Alpha cells are another type of cell in the pancreas, but they secrete glucagon, not insulin. Glucagon has the opposite effect of insulin, increasing blood sugar levels by stimulating the breakdown of glycogen in the liver.
C. 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 insulin.
D. 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 insulin.
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Related Questions
Correct Answer is D
Explanation
D. Obesity and weight loss are more directly linked to type 2 diabetes but they are not primary factors in the management of type 1 diabetes. Type 1 diabetes is characterized by the autoimmune destruction of beta cells, leading to an absolute deficiency of insulin. Weight loss can improve insulin sensitivity, which might be relevant for type 2 diabetes or insulin resistance, but type 1 diabetes patients will always require exogenous insulin regardless of weight changes.
A. Patients with type 1 diabetes are at risk for diabetic ketoacidosis (DKA), a serious condition caused by high blood glucose levels and ketone buildup due to insufficient insulin. Monitoring blood glucose levels is crucial in preventing DKA.
B. Type 1 diabetes is an autoimmune disease where the immune system attacks the insulin- producing beta cells in the pancreas. A viral infection can sometimes trigger this autoimmune response in genetically susceptible individuals.
C. There is a genetic component to type 1 diabetes, and having a family history of the disease can increase the risk, although environmental factors also play a role.
Correct Answer is B
Explanation
B. Morning is considered the ideal time for collecting a sputum specimen. Overnight, mucus accumulates in the respiratory tract because the patient is less active and not clearing their throat or coughing as much. This means that the mucus is more concentrated and has had time to build up, providing a more substantial and representative sample of what is in the lungs.
A. Collecting a sputum specimen at bedtime is generally not ideal. By the end of the day, the patient’s respiratory tract might have cleared some of the accumulated mucus naturally through coughing or other activities.
C. Collecting a sputum specimen after meals is not recommended. Eating can introduce food particles and bacteria from the mouth into the sputum, contaminating the sample.
D. Starting antibiotics before collecting a sputum specimen can alter the bacterial flora present in the respiratory tract. This can lead to a false-negative result or an inaccurate representation of the pathogens causing the infection.
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