Conjoined Twins, Whose Bodies Are Joined at Birth, Have Shown

question 173

Multiple Choice

Conjoined twins, whose bodies are joined at birth, have shown that

• A)when one twin is asleep, the other one must also be asleep due to the sleep-promoting chemicals in the connected bloodstreams.
• B)when one twin is asleep, the other one must also be asleep because of the decreases in blood pressure across their connected systems.
• C)it is not unusual for one twin to be asleep while the other one is awake.
• D)irregular sleeping patterns occur due to the connected systems which cause a disruption in the balance of the sleep-promoting chemical found in their connected bloodstreams.