10. Which describes an effect of stress on the respiratory system? It can trigger muscle tension.
O It can trigger an asthmatic attack.
.
It can stimulate the need for caffeine.
O It can increase blood pressure.

It can trigger muscle tension which may trigger an asthmatic attack as respiratory system is about breathing and asthma might make it hard to breathe unless you have an inhaler. Blood pressure have nothing to do with respiratory system as it falls under circulatory system.

loses consciousness is your real and smarter answer.