OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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When does Sudden Infant Death Syndrome typically occur?

  1. When the infant is asleep

  2. When the nervous system is not properly developed

  3. When the infant is crying

  4. When the infant is feeding

The correct answer is: When the nervous system is not properly developed

Sudden Infant Death Syndrome (SIDS), often referred to as crib death, is primarily noted to occur when the infant is asleep. It is a sudden and unexplained death that typically happens during sleep, particularly in infants who are less than one year old. The other factors such as crying or feeding are not directly associated with the occurrence of SIDS. While the development of the nervous system is indeed a critical factor in an infant's overall health and susceptibility to various conditions, the phenomenon of SIDS is directly related to the sleeping state of the infant. Therefore, the correct context for SIDS is that it occurs during sleep, highlighting the importance of safe sleep practices to help reduce risk factors associated with this syndrome.

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