Q.

Which statement is TRUE regarding cardiac muscle?

A. cardiac muscle fibres are multinucleated
B. they are smaller than skeletal muscle fibres
C. Ca2+ release is triggered by membrane repolarisation
D. the elastic ‘Titin” protein component is greater than in skeletal muscle, adding stiffness
E. the amount of Ca2+ in the sarcoplasmic reticulum is decreased by catecholamine stimulation
Answer» B. they are smaller than skeletal muscle fibres
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