The release of insulin is caused by:
Increased lipid breakdown
Decreased blood glucose level
Increased protein breakdown
Increased blood glucose level
The Correct Answer is D
Choice A reason: Increased lipid breakdown does not directly cause the release of insulin. Insulin is a hormone that facilitates glucose uptake by cells and helps regulate blood sugar levels. Lipid metabolism is primarily regulated by other mechanisms and hormones, such as glucagon and epinephrine.
Choice B reason: Decreased blood glucose level would not stimulate insulin release. In fact, low blood glucose levels would signal the pancreas to reduce insulin secretion. Instead, glucagon would be released to increase blood glucose levels by stimulating the conversion of glycogen to glucose in the liver.
Choice C reason: Increased protein breakdown does not directly trigger the release of insulin. Protein metabolism involves amino acids and other metabolic pathways, but insulin release is primarily regulated by blood glucose levels.
Choice D reason: The release of insulin is caused by increased blood glucose levels. When blood glucose levels rise, such as after eating a meal, the beta cells in the pancreas secrete insulin to help cells absorb glucose from the bloodstream, thereby lowering blood glucose levels and maintaining homeostasis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Neuropathies occur due to the thickening, sclerosis, obstruction, and ischemia of the small blood vessels that supply the nerves (vasa nervorum). Chronic hyperglycemia leads to damage of these blood vessels, reducing blood flow and oxygen supply to the nerves. This ischemia results in nerve degeneration, delayed nerve conduction, and impaired sensory function, which are characteristic of diabetic neuropathy.
Choice B reason: Infection in the nerves is not a primary cause of diabetic neuropathy. While infections can affect the nerves, the neuropathy associated with diabetes is primarily due to vascular complications and chronic hyperglycemia, not infections.
Choice C reason: Excessive glucose exposure to the brain and spinal cord is not directly related to neuropathy. The neuropathic complications in diabetes are due to the damage of peripheral nerves caused by hyperglycemia and vascular insufficiency, rather than glucose affecting the central nervous system.
Choice D reason: Inability to provide continuous glucose to the brain and spinal cord is not a cause of neuropathy. The brain and spinal cord typically have a continuous supply of glucose. Neuropathy in diabetes results from the damage to the peripheral nerves due to prolonged high blood glucose levels and subsequent vascular complications.
Correct Answer is D
Explanation
Choice A reason: Decreased fluid intake would typically result in lower urine output and higher urine concentration, but it does not directly explain a urine sodium concentration of 10 mmol/L.
Choice B reason: Increased fluid intake would generally lead to higher urine output and lower urine sodium concentration, as the kidneys excrete excess sodium. Therefore, this is not consistent with a urine sodium concentration of 10 mmol/L.
Choice C reason: Insensible loss refers to fluid loss that is not easily measured, such as through sweating or breathing. It does not directly explain the urine sodium concentration.
Choice D reason: Sodium retention is consistent with a low urine sodium concentration of 10 mmol/L in patients with large-volume ascites. In conditions like cirrhosis, the body retains sodium, leading to fluid accumulation in the abdomen (ascites) and lower sodium excretion in the urine.
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