A nurse is explaining to parents how the central nervous system of a child differs from that of an adult. Which statement accurately describes these differences?
The brain of a term infant weighs less than half of the weight of the adult brain.
The infant has 150 mL of CSF compared with 50 mL in the adult.
Coordination and fine motor skills develop as myelinization of peripheral nerves progresses.
Papilledema is a common manifestation of ICP in the very young child.
The Correct Answer is A
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A sign of increased intracranial pressure (ICP) in a 10-year-old child is a headache. Headache is a common symptom associated with increased pressure within the cranial cavity. It can be a result of various conditions that cause elevated intracranial pressure, such as brain tumours, intracranial haemorrhage, hydrocephalus, or brain trauma. The headache may be described as persistent, worsening, or accompanied by other symptoms such as nausea, vomiting, or changes in neurological status.
tachypnoea (rapid breathing), in (option A) is incorrect because it is not a specific sign of increased intracranial pressure. It can be seen in various conditions, including respiratory and cardiovascular disorders, anxiety, or physical exertion.
bulging fontanel in (option B) is incorrect because it, is more commonly observed in infants and is not typically seen in older children. The fontanelles (soft spots) on an infant's skull normally close by the age of 18-24 months.
an increase in head circumference in (option D) is incorrect because it, may be a sign of increased intracranial pressure in infants. However, in a 10-year-old child, the fontanelles are typically closed, and head circumference growth is not a reliable indicator of increased intracranial pressure
Correct Answer is B
Explanation
The regulation of acid-base balance in the body involves multiple systems working together. The respiratory system, renal system, and chemical-buffering systems play key roles in maintaining the balance of acids and bases in the body.
The respiratory system helps regulate acid-base balance through the control of carbon dioxide (CO2) levels in the blood. By adjusting the rate and depth of breathing, the respiratory system can increase or decrease the elimination of CO2, which affects the pH of the blood.
The renal system (kidneys) plays a crucial role in regulating acid-base balance by controlling the excretion and reabsorption of hydrogen ions (H+) and bicarbonate ions (HCO3-) in the urine. The kidneys can excrete excess acids or bases to help maintain the body's pH within a normal range.
The chemical-buffering systems involve various chemical compounds in the body that can absorb or release hydrogen ions to help maintain pH balance. Examples of chemical buffers include bicarbonate ions (HCO3-), phosphate ions (HPO4-), and proteins.
the cardiovascular and integumentary systemin (option A) is incorrect because they, are not primarily responsible for regulating acid-base balance in the body.
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