Asked by Rosie Sangi on May 21, 2024
Verified
Cross-bridges connect
A) tropomyosin to troponin.
B) troponin to myosin.
C) tropomyosin with actin.
D) troponin to actin.
E) myosin to actin.
Cross-Bridges
The connection formed between the heads of myosin molecules and actin filaments during muscle contraction.
Tropomyosin
A protein found in muscle tissue that regulates muscle contraction by blocking or exposing binding sites for myosin on actin filaments.
Troponin
A protein complex involved in muscle contraction; found in cardiac and skeletal muscles, its levels in the blood are used as a diagnostic indicator for heart attacks.
- Elucidate the process of muscle contraction and outline the biochemical activities that underpin the contraction and relaxation of muscles.
Verified Answer
IM
Ingrid MonserratMay 24, 2024
Final Answer :
E
Explanation :
Cross-bridges are formed between the myosin heads and the actin filaments in muscle contraction. The myosin heads bind to the actin filaments, forming cross-bridges that allow the filaments to slide past each other and shorten the muscle fiber.
Learning Objectives
- Elucidate the process of muscle contraction and outline the biochemical activities that underpin the contraction and relaxation of muscles.