Answer the following statement(s) true (T) or false (F)

1. Smooth muscle contraction is stimulated by acetylcholine and norepinephrine. 
2. Intercalated discs allow muscle fibers to contract separately. 
3. Cardiac muscle must have nerve stimulation to contract and relax. 
4. Norepinephrine increases the heart rate. 
5. ATP can be defined as energy needed for muscle activity. 

1. True
2. False
3. False
4. True
5. True

Health Professions

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