Smooth muscle contraction is 'tonic' and efficient because of the 'latch state.' This state is characterized by:
Show answer and explanation
Correct answer: Dephosphorylated myosin-actin bonds with low ATP use.
The latch state allows smooth muscle to maintain high tension for long durations (like in blood vessel walls) without consuming large amounts of ATP. This is unique to smooth muscle physiology.
Keep practicing
More Muscle Contraction questions
- Which of the following describes the role of Calsequestrin?
- Which protein acts as a calcium sensor, shifting the position of tropomyosin to expose myosin-binding sites?
- What is the specific role of ATP during the 'detachment' phase of the cross-bridge cycle?
- In skeletal muscle, where is the majority of calcium stored during the relaxed state?
- What structural change occurs to the H-zone and I-band during a full muscle contraction?
- The 'Power Stroke' of the cross-bridge cycle is triggered by which of the following events?