Physiology Which of the following is NOT true for a smooth muscle? A no Z-discs present B Actin : myosin ratio = 2 : 1 C The contraction is "thick filament-driven" D "Latch bridge" observed. 💡 Explanation Which of the following is NOT true for a smooth muscle? ✓ Correct Answer: B. Actin : myosin ratio = 2 : 1