Which statement best describes why infants are at greater risk for dehydration than older children?
Infants have an increased ability to concentrate urine.
Infants have an increased extracellular flued volume
Infants have a greater volume of intracellular fluid.
Infants have a smaller body surface area.
The Correct Answer is B
The statement that best describes why infants are at greater risk for dehydration than older children is option B. Infants have an increased extracellular fluid volume compared to older children. This means that a larger proportion of their total body fluid is located outside the cells, in the extracellular compartment. This higher extracellular fluid volume makes infants more susceptible to fluid losses and dehydration if they experience inadequate fluid intake or increased fluid losses.
infants have an increased ability to concentrate urine in (option A), is incorrect. Infants have limited renal function and may have difficulty concentrating urine compared to older children and adults. This can contribute to a higher risk of dehydration in infants.
infants have a greater volume of intracellular fluid in (option C), is incorrect. The volume of intracellular fluid is not the primary factor contributing to the increased risk of dehydration in infants.
infants have a smaller body surface area in (option D) is incorrect because it, is not directly related to the increased risk of dehydration. Body surface area influences heat exchange and fluid loss through sweating but is not the main factor contributing to the higher risk of dehydration in infants.
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Related Questions
Correct Answer is A
Explanation
Intussusception is a medical condition where a portion of the intestine telescopes into an adjacent section, causing an obstruction. This obstruction can affect the normal passage of stool through the intestine.
In intussusception, the obstructed intestine can lead to the development of blood and mucus within the stool, giving it a characteristic appearance described as "currant jelly." The stool may contain a combination of blood, mucus, and faecal matter, resembling the colour and consistency of currant jelly.
loose, foul-smelling stools in (option) is incorrect because it, is not specific to intussusception and can be associated with various gastrointestinal conditions.
hard stools positive for guaiac in (option C) is incorrect because it, is not typical of intussusception. Hard stools and positive guaiac test results are more commonly associated with constipation or other conditions affecting the lower gastrointestinal tract.
ribbon-like stools, in (option D) is incorrect because it may be seen in conditions like colorectal cancer or other obstructive disorders. However, it is not a specific characteristic of intussusception.
In the context of intussusception, the presence of "currant jelly" stools is considered a significant sign and should prompt immediate medical attention. Intussusception is a medical emergency and requires prompt diagnosis and treatment.
Correct Answer is A
Explanation
The statement that accurately describes the difference between the central nervous system (CNS) of a child and an adult is option A. The brain of a term infant weighs less than half of the weight of the adult brain. The brain undergoes significant growth and development during childhood and continues to develop until early adulthood. At birth, the brain is only a fraction of its adult weight, and it continues to grow and mature over time.
infant has 150 mL of cerebrospinal fluid (CSF) compared with 50 mL in the adult in (option B), is incorrect. The volume of CSF in the CNS is not a significant difference between children and adults.
coordination and fine motor skills develop as myelination of peripheral nerves progresses in (option C), is an incorrect statement. Myelination is an ongoing process that occurs throughout childhood and contributes to the development of coordination and fine motor skills.
papilledema is a common manifestation of increased intracranial pressure (ICP) in the very young child in (option D), is not correct. Papilledema refers to swelling of the optic disc and is not commonly seen in very young children. Signs of increased ICP in young children may present differently compared to adults and can include altered mental status, irritability, vomiting, and changes in vital signs.
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