Q. Which statement is TRUE regarding cardiac muscle? (Solved)
1. cardiac muscle fibres are multinucleated
2. they are smaller than skeletal muscle fibres
3. Ca2+ release is triggered by membrane repolarisation
4. the elastic ‘Titin” protein component is greater than in skeletal muscle, adding stiffness
5. the amount of Ca2+ in the sarcoplasmic reticulum is decreased by catecholamine stimulation
- b. they are smaller than skeletal muscle fibres