Multiple Choice Question When ATP is added to a contracted muscle fiber, which of the following will occur? A conformational change in troponin will occur. The muscle fiber will contract more. Calcium will be released from the SR. The muscle fiber can relax.
Added by Emilia L.
Close
Step 1
This allows the muscle fiber to relax. Show more…
Show all steps
Your feedback will help us improve your experience
Kaela Piechowicz and 54 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Imagine the troponin in a skeletal muscle fiber had a mutation that prevented its binding to calcium but allowed it to bind to tropomyosin. Which of the following would increase the amount of force generated by the muscle fiber? Assume ATP levels are normal. Choose every correct answer. Group of answer choices: Inhibiting calcium release from the sarcoplasmic reticulum, Opening voltage-gated sodium channels, Acetylcholine receptor stimulation such that the fiber reaches threshold, Opening voltage-sensitive calcium channels, Nothing would cause an increase in force generated by the muscle fiber.
Kaela P.
When troponin binds calcium, A. it changes conformation, twisting tropomyosin and exposing actin-myosin binding sites. B. ion channels open and sodium rushes into the muscle cell. C. it allows tropomyosin to bind actin. D. it changes conformation, exposing the ATP binding site and allowing the actin-myosin bond to break. E. ATP binds to the myosin head, allowing myosin to attach to actin.
Madhur L.
In skeletal muscle fibers, which one of the following has ATPase activity? Actin, Myosin, Troponin I, Troponin-C, Tropomyosin. Which one of the following DOES occur in skeletal muscle contraction? a. The SR releases calcium ions b. Calcium ions bind to tropomyosin c. Actin shortens d. Myosin lengthens. Which one of the following is the usual signaling agent at the neuromuscular junction? a. Dopamine b. Acetylcholine c. Neurophysin.
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD