Choose the correct association of the various components in

Choose the correct association of the various components in relationship to the ANS influence on the heart. SANS: SA NODE: RELAXATION SANS: AV NODE: FIGHT OR FLIGHT PANS: SA NODE: HEART RATE: 150 BEATS/MIN. PANS: AV NODE: AGGRESSION

Solution

The correct option is SANS: AV NODE: FIGHT OR FLIGHT. This is because the sympathetic autonomic nervous system is responsible for the conduction of the signals through AV NODE as it is the highly specialized conducting tissue in terms of heart tissue. The AV NODE functions in SANS for the trigger of fight or flight response. It helps SANS in increasing the heart rate, decreasing the refractory period.