system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
True statement about smooth muscles
assistant
The correct answer is  Smooth muscle

No T tubules. Instead it has Caveolae which is invagination of smooth muscle membrane, it has voltage gates L-type Ca2+ channel
No troponin Ca2+ binds Calmodulin
No Z lines. Achorage for actin filaments is provided by dense bodies.