Answer to Question 1
2
Explanation: 2. The first period of reactivity lasts approximately 30 minutes after birth. During this period the newborn is awake and active and may appear hungry and have a strong sucking reflex. After approximately half an hour, the newborn's activity gradually diminishes, and the heart rate and respirations decrease as the newborn enters the sleep phase. The sleep phase may last from a few minutes to 2 to 4 hours.
Answer to Question 2
1
Rationale 1: Lead exposure during pregnancy, as well as during childhood, can cause neurological damage.
Rationale 2: Exposure to latex is not known to cause neurological damage.
Rationale 3: Exposure to formaldehyde is not known to cause neurological damage.
Rationale 4: Exposure to benzene is not known to cause neurological damage.