Myosin binds to actin, then bends. What is ATP needed for next? A. to pump the Ca++ “keys” back into the sarcoplasmic reticulum B. to replace the strap and cover the binding sites C. to give feedback to the neuron that contraction occurred D. to un-bind myosin from actin and re-set for another powerstroke.

Q: Compare the composition of flight muscles with a powerful locomotive muscle in terms of…

A: Flight muscles are a type of muscle which is found in birds or insects. This muscle helps birds or…

Q: requires

A: Answer:- Striated and smooth muscle activation differ because: Let's , elaborate on all the options…

Q: You discover a mutant mouse whose skeletal muscles do not work properly.  You remove a piece of…

A: Acetylcholinesterase or acetylhydrolase is a cholinesterase enzyme primarily found at neuromuscular…

Q: Calcium plays a crucial role in the contraction of skeletal muscles. i. Where is calcium stored…

A: The sliding filament theory was proposed as an explanation for muscle contraction. It is based on…

Q: The organization of myosin in smooth and striated muscle:

A: Smooth muscle consists of thick and thin filaments that are not arranged into sarcomere.In skeletal,…

Q: Striated muscle twitch force reaches a maximum after nearly all of the calcium is pumped out of the…

A: The correct answer is:D.) Calcium is the initial switch to turn the actin thin filament on and then…

Q: Total force in the length:force relationship is the result of a.) ideal overlap between the myosin…

A: The length-tension relationship in muscle tissue describes the force a muscle can generate at…

Q: Myosin filaments iterdigitate with actin filaments in order to bring about muscle contraction.…

A: The process of muscle contraction is necessary for the normal physical activities of the body. Force…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: How does the AP in the motor neuron cause calcium release in the muscle fiber?

A: Action potential refers to the depolarisation of neuronal membrane which is required for the…

Q: If a muscle cell’s sarcoplasmic reticulum had little to no Ca2+, could the muscle cell still produce…

A: Ca2+ ions play an important role in muscle contraction by creating interactions between the…

Q: During which phase of the crossbridge cycle is ATP split into ADP and Pi? A. Immediately preceding…

A: Cross bridge cycling refers specifically to the action of the cross-bridge, that being the head and…

Q: During which phase of a twitch in a muscle fiber istension the greatest?a. resting phaseb.…

A: The phenomenon of lifting or moving an object (load) involves the sarcomeres present in the muscle…

Q: Choose the best description of how myosin and actin are arranged within the two types of protein…

A: In order to facilitate movement, muscles are attached to bones. They function by shortening…

Q: With regard to muscle contraction, which of the following is an INCORRECT statement with regard to…

A: The muscle cells contain a striped pattern or striations which is formed by a series of basic units…

Q: How would muscle contractions be affected if skeletalmuscle fibers did not have T-tubules?

A: Muscles:                    In animals, soft tissues found known as muscles. Muscles cells contain…

Q: When ADP and Pi are bound to myosin in the cross-bridge cycle... (MULTIPLE SELECT) A. There is no…

A: The cross-bridge cycle of muscle contraction is the process in which the actin filament and myosin…

Q: Describe the contraction of a muscle fiber, starting with what events take place at the…

A: Introduction: Muscle is a mesodermal contractile connective tissue. Muscles contain unique…

Q: Which is not a protein found in thin filaments? a. Tropomyosin b. Actin c. Troponin d. Myosin e. No…

A: The striated muscles consist of skeletal muscles and cardiac muscles. The striations in muscles are…

Q: Where is ATP's energy used during crossbridge cycling? A. When ATP attaches to myosin and causes…

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: How is the list below to be properly put in order to describe a muscular contraction?

A: Muscle contraction can be defined as the activation of tension-generating sites that are present…

Q: Myofiber,that is mature muscle cells, have more than one nucleus,how does that happen

A: Myofibers are units that form the skeletal muscles. They are seen as bundles, and apart from muscle…

Q: Which statement about the diagram is not correct??  A. The diagram enlarged one myofibril B. This…

A: The muscle fibers are multi-nucleated (exclusively in the case of skeletal muscle fibers),…

Q: As ADP and Ⓟ are released from a myosin head,a. actin filaments move toward the H band.b. a…

A: During muscles contraction, energy for the movement of myosin head is obtained by the breakdown of…

Q: Distinguish between skeletal, smooth, and cardiac muscle in terms of location and whether they have…

A: Introduction:- A tissue is defined as the group of cells that have similiar structure and functions…

Q: The diagram below represents the terminal cisterna in a muscle. Name and briefly explainthe function…

A: Nerve Impulse: It all starts with a nerve impulse reaching the neuromuscular junction, where a motor…

Q: Explain why myosin II in a sarcomere can produced force only for that sarcomere contraction and not…

A: SARCOMERE   It is the basic structural and functional unit of muscle tissue. COMPONENTS: Each…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.