When increased blood glucose levels stimulate increased secretion of insulin, this is an example of control by:
Positive feedback.
Releasing hormones.
Negative feedback.
Ectopic hormones.
The Correct Answer is C
Choice A reason: Positive feedback mechanisms amplify changes or deviations in the body. They are less common in physiological processes and typically drive processes to completion, such as childbirth and blood clotting. The regulation of blood glucose levels does not operate on a positive feedback mechanism.
Choice B reason: Releasing hormones are typically involved in the hypothalamic-pituitary axis and the regulation of hormone secretion from other endocrine glands. Examples include thyrotropin-releasing hormone (TRH) and gonadotropin-releasing hormone (GnRH). Insulin secretion in response to blood glucose levels is not directly controlled by releasing hormones.
Choice C reason: Negative feedback is the primary mechanism by which homeostasis is maintained in the body. When blood glucose levels rise, the pancreas secretes insulin to lower blood glucose levels, restoring them to normal. This is an example of negative feedback, as the increase in glucose levels triggers a response (insulin secretion) that counteracts the initial change, bringing blood glucose back to its set point.
Choice D reason: Ectopic hormones are hormones produced by tissues that normally do not produce hormones, often in cases of tumors or certain disease conditions. The regulation of insulin in response to blood glucose levels does not involve ectopic hormone production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: NGT (nasogastric tube) is used for enteral feeding, not parenteral nutrition. Enteral feeding involves delivering nutrients directly to the stomach or small intestine, bypassing the need for eating. This method is suitable for patients who have a functioning digestive system but cannot eat orally. Parenteral nutrition, on the other hand, involves delivering nutrients directly into the bloodstream.
Choice B reason: Oral administration of nutrition involves consuming food or nutrients by mouth. This method is suitable for individuals who can eat and digest food normally. Parenteral nutrition bypasses the digestive system altogether and delivers nutrients directly into the bloodstream, making oral administration inappropriate for TPN.
Choice C reason: Central Line is the correct answer because Total Parenteral Nutrition (TPN) requires delivery of nutrients directly into a central vein, typically the superior vena cava. This is because TPN solutions are highly concentrated and can irritate smaller veins, leading to complications such as phlebitis. A central line allows for the safe administration of TPN, ensuring that the high osmolarity solution is rapidly diluted by the large volume of blood in the central veins.
Choice D reason: Peripheral line administration is used for Peripheral Parenteral Nutrition (PPN), not TPN. PPN can be delivered through a peripheral vein because it is less concentrated than TPN. Using a peripheral line for TPN is not appropriate due to the risk of complications from the high osmolarity of the TPN solution.
Correct Answer is C
Explanation
Choice A reason: Cirrhosis is a condition that affects the liver, not the kidneys. It is not related to nephropathy, which is kidney disease.
Choice B reason: Cardiac disease, while a common complication of diabetes, is not directly caused by nephropathy. Nephropathy primarily affects the kidneys and can lead to kidney failure, but it is not the leading cause of cardiac disease.
Choice C reason: Nephropathy in individuals with diabetes can lead to end-stage kidney disease (ESRD), also known as end-stage renal disease. This is a serious condition where the kidneys are no longer able to function adequately to maintain life, often requiring dialysis or a kidney transplant.
Choice D reason: Pulmonary disease affects the lungs and is not directly related to nephropathy. While diabetes can have complications that affect the lungs, nephropathy specifically targets the kidneys.
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