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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Naxlex Comprehensive Predictor Exams
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Correct Answer is B
Explanation
The anatomy of the urinary tract can influence the susceptibility to urinary tract infections (UTIs). In the case of young girls, their urethra is shorter compared to adult females, which increases the likelihood of bacteria reaching the bladder. The shorter urethra provides a shorter distance for bacteria to travel from the outside of the body to the bladder, making it easier for bacteria to enter and cause an infection.
Prostatic secretions in males in (option A) is incorrect because they are not directly related to the increased susceptibility to UTIs. Prostatic secretions can, however, contribute to conditions like prostatitis, which is an inflammation of the prostate gland that can be associated with urinary symptoms and sometimes bacterial infections.
Frequent emptying of the bladder in (option C) is incorrect because it is generally considered a healthy practice as it helps to flush out any potential bacteria in the urinary tract. It does not predispose the urinary tract to infection.
Increased fluid intake in (option D) is incorrect because it is generally encouraged to maintain proper hydration and urinary tract health. It can help to flush out bacteria from the urinary system, reducing the risk of infection.
While these factors may have implications for urinary tract health, the specific factor that predisposes the urinary tract to infection, particularly in young girls, is the short urethra (B).
Correct Answer is B
Explanation
Hypothyroidismreferstoanunderactivethyroid glandthatdoesnotproduceenoughthyroidhormones. In newborns, this condition is known as congenital hypothyroidism. Thesymptoms mentioned—mottled skin, a large fontanel (soft spot on the baby's head), a largetongue,lethargy, anddifficultyfeeding—arecharacteristic ofhypothyroidism inneonates.
Mottledskincanoccur duetodecreasedcirculationandlow bodytemperatureassociatedwith hypothyroidism. A large fontanel and tongue are common physical features seen ininfants with hypothyroidism. Lethargy and poor feeding are also typical signs of thiscondition.
Hypoglycaemia in (option A) is incorrect because it refers to low blood sugar levels andusuallypresentswithdifferent symptomssuchas jitteriness,tremors,and sweating.
Hypocalcaemia in (option C) is incorrect because it is low calcium levels and can manifestwithsymptoms like muscle cramps, twitching,and seizures.
Phenylketonuria (PKU) in (option D) it is incorrect because it is a metabolic disordercharacterized by the inability to metabolize the amino acid phenylalanine, and it typicallypresentswith differentsymptoms such asintellectual disabilityandamustydoorto theskin.
Therefore, based on the symptoms described, hypothyroidism (B) is the most likely disorderinthisneonate. Itisimportanttoconsultahealthcareprofessionalforaproperdiagnosisandappropriatetreatment.
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