Which organ plays a central role in regulating blood glucose levels by secreting insulin and glucagon?
Liver.
Kidneys.
Lungs.
Spleen.
The Correct Answer is A
The liver plays a central role in blood glucose regulation by releasing glucose into the bloodstream through glycogenolysis and gluconeogenesis when blood glucose levels are low. It also stores glucose as glycogen and responds to insulin and glucagon signals.
Incorrect choices:
b. This choice is incorrect. While the kidneys play a role in filtering blood and excreting waste products, they are not primarily responsible for regulating blood glucose levels.
c. This choice is incorrect. The lungs are involved in oxygen and carbon dioxide exchange and are not directly involved in blood glucose regulation.
d. This choice is incorrect. The spleen is involved in immune function and blood filtration, but it does not play a central role in blood glucose regulation.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Glipizide is a sulfonylurea medication that stimulates insulin secretion from pancreatic beta cells, helping to lower blood glucose levels in individuals with type 2 diabetes mellitus.
Incorrect choices:
a. This choice is incorrect. Metformin is an oral antidiabetic medication that primarily improves insulin sensitivity and reduces hepatic glucose production.
c. This choice is incorrect. Insulin glargine is a long-acting basal insulin used in insulin therapy to provide consistent background insulin coverage.
d. This choice is incorrect. Acarbose is an alpha-glucosidase inhibitor that delays carbohydrate absorption in the intestines and is used to manage postprandial hyperglycemia.
Correct Answer is D
Explanation
Long-standing hyperglycemia in diabetes mellitus can lead to impaired wound healing, as high blood sugar levels affect blood flow and immune function, increasing the risk of infections.
Incorrect choices:
a. This choice is incorrect. Polyuria, polydipsia, and polyphagia are the "three P's" associated with diabetes-related hyperglycemia.
b. This choice is incorrect. Nausea, vomiting, and abdominal pain are not typically related to long-standing hyperglycemia in diabetes.
c. This choice is incorrect. Blurred vision and vision loss are manifestations of diabetic retinopathy, a microvascular complication, rather than impaired wound healing.
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