A nurse is caring for a preterm newborn who has hypoglycemia due to inadequate gluconeogenesis.
The nurse should understand that this condition occurs because preterm newborns have limited stores of which of the following substances?
Glycogen
Glucose
Insulin
Glucagon
The Correct Answer is A
The correct answer is choice A. Glycogen. Preterm newborns have limited stores of glycogen, which is a substance made from glucose that is stored in the liver and muscle cells to be used later for energy. When blood glucose levels are low, the hormone glucagon signals the cells to convert glycogen back into glucose and release it into the bloodstream. However, preterm newborns have a reduced ability to produce glucagon and to use gluconeogenesis, which is the process of making new glucose from other sources. Therefore, they are at risk of hypoglycemia, which is a condition where blood glucose levels are too low to support normal brain function.
Choice B is wrong because glucose is the sugar that travels through the blood to fuel the cells, not a substance that is stored for later use.
Choice C is wrong because insulin is a hormone that helps cells absorb glucose from the blood, not a substance that is stored for later use.
Choice D is wrong because glucagon is a hormone that triggers the release of glucose from the liver and muscle cells, not a substance that is stored for later use.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The correct answer is choice C. Nasal flaring and grunting are signs of respiratory distress in a newborn and should alert the nurse to a potential problem.
The nurse should monitor the newborn’s respiratory rate, oxygen saturation, and chest movements, and notify the provider if the symptoms persist or worsen.
Choice A is wrong because molding of the head is a normal finding in a newborn who was delivered vaginally.
It is caused by the pressure of the birth canal on the skull bones and usually resolves within a few days.
Choice B is wrong because acrocyanosis of hands and feet is a normal finding in a newborn during the first 24 hours of life.
It is caused by poor peripheral circulation and does not indicate hypoxia or cyanosis.
Choice D is wrong because vernix caseosa on skin folds is a normal finding in a newborn.
It is a white, cheesy substance that protects the skin from amniotic fluid and helps with thermoregulation.
It usually disappears within a few days.
Correct Answer is ["A","B","C","D","E"]
Explanation
The correct answer is choice A, B, C, D and E.All of these are possible modes of transmission for hepatitis B virus (HBV), which is a viral infection that attacks the liver and can cause both acute and chronic disease.The virus is most commonly transmitted from mother to child during birth and delivery, as well as through contact with blood or other body fluids during sex with an infected partner, unsafe injections or exposures to sharp instruments.
Choice A is correct because unprotected sexual contact can expose a person to the blood, semen, or vaginal fluids of an infected partner.
Choice B is correct because sharing drugs, needles, or “works” when using drugs can expose a person to the blood of an infected person.
Choice C is correct because poor infection control practices in medical settings can expose a person to contaminated needles or syringes or sharp objects that have been used on an infected person.
Choice D is correct because sharing of blood sugar (diabetes) testing equipment can expose a person to the blood of an infected person.
Choice E is correct because needle sticks or sharps exposures on the job can expose a person to the blood of an infected
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