Summed twitches create a greater amount of tension in skeletal muscle cells because NOTE: select all the correct answer choices. Cross-bridge cycling occurs faster. The muscle cell is becoming more depolarized with every additional stimulus. Each addition twitch releases more calcium into the cytoplasm. More troponin is being bound by calcium.

Summed twitches create a greater amount of tension in skeletal muscle cells because NOTE: select all the correct answer choices. Cross-bridge cycling occurs faster. The muscle cell is becoming more depolarized with every additional stimulus. Each addition twitch releases more calcium into the cytoplasm. More troponin is being bound by calcium.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 12UC

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Similar questions

Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.
Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the above
In the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.
After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.
The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament