TLS Online TPP Program

#Question id: 32390


What happens when Ca²⁺ binds to troponin C?

#Unit 2. Cellular Organization
  1. Troponin I strengthens its hold on actin
  2. Tropomyosin moves away, exposing myosin-binding sites on actin
  3. Myosin filaments shorten, leading to sarcomere contraction
  4. ATP is hydrolyzed directly by troponin