What is the role of Ca2+ in the control of muscle contraction?
A) It causes depolarization of the T tubule system.
B) It changes the conformation of troponin, which ultimately results in myosin-binding sites being exposed.
C) It changes the conformation of myosin heads, causing actin and myosin filaments to slide past each other.
D) It binds to tropomyosin and breaks actin-myosin cross-bridges.
E) It blocks the ATP-binding site on myosin heads, enabling muscles to relax.
Correct Answer:
Verified
Q17: Smooth muscle differs from both cardiac and
Q18: Which muscle type(s) use(s) calcium to trigger
Q19: Which muscle type(s) has/have numerous nuclei per
Q20: Which event occurs during skeletal and cardiac
Q21: Refer to the figure showing molecules found
Q23: Which statement about slow-twitch and fast-twitch muscles
Q24: The resting potential of smooth muscle cells
Q25: Slow-twitch fibers
A) are also called glycolytic muscle.
B)
Q26: Muscle tone is the condition in which
A)
Q27: Which is a feature of cardiac muscle
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents