During rescue breaths, each breath should last about one second.

• A. False
• B. True
• C. Two seconds
• D. Not specified

Answer: (B)

During rescue breaths, you want a quick, controlled breath that makes the chest rise. Delivering each breath in about one second provides enough air to ventilate without over-inflating the lungs or causing gastric inflation. This timing helps maintain effective oxygen delivery during CPR. If you took longer than a second, you risk over-pressurizing the chest; if you took too long or too short, ventilation may be ineffective. Guidelines typically describe delivering breaths of about one second each (roughly 10 breaths per minute when combined with chest compressions). So this statement aligns with how rescue breaths are performed. The other durations would either under-ventilate or over-ventilate and aren’t recommended.