Outline 3 Mechanisms for heartbeat

Question 1

Myogenic:

Answer 1

-SA node in Right Atrium causes atrium to contract
-Modified muscle tissue that generates electrical impulse
-SA node sends message to AV
-AV sends impulse to signal ventricles contract

Question 2

Medulla:

Answer 2

-Monitors CO2 levels/PH levels
-Cardiac Nerve: accelerates heart rate
-Vagnus nerve: slows down heart rate

Question 3

Epinephrine ( adrenaline)

Answer 3

-From fight or flight response
-Increase heart rate