How can biceps and triceps make a woman's arm pull her hand out of hot water?

Biceps and triceps are the primary muscles responsible for elbow flexion and extension. When a woman's hand touches hot water, sensory nerves send a pain signal to her brain, triggering a reflex action. The biceps contract to quickly bend the elbow, pulling the hand away, while the triceps relax to facilitate this movement. This rapid response helps prevent injury from the heat.