Place these structures in order from LARGEST structure to SMALLEST: A) Myofibril  B) Myofilament (MYOSIN) 1 C) Muscle Body D) Muscle Bundle (Fascicle) E) Muscle Fiber F) Myofilament (ACTIN)

Q: What are two roles of ATP during muscle contraction?

A: Muscle contraction is either increase in muscle tension or a decrease in the muscle length. Muscle…

Q: In the process of muscle contraction, which of the following steps immediately precedes the sliding…

A: Muscle cells are specialized for contraction. Muscles allow for motions such as walking, and they…

Q: After lactate is produced in the sarcoplasm, where might it go and how might it be used?

A: Two pyruvates are converted to two lactic acid molecules, which ionize to form lactate. In this…

Q: In the sliding filament model of muscle contraction, I bands contain     sacrcomeres.     thin…

A: The cytoskeletal proteins including actin filament or microfilament, microtubules and intermediate…

Q: During evolution, skeletal muscle became adapted to functional de-mands ranging from sudden,…

A: The skeletal muscles of vertebrates are composed of different types of fibers. This includes slow…

Q: Which of the following lists the structures from largest to smallest?a. motor unit, muscle,…

A: Muscle is a soft tissue found in many animals. Muscle cells contain protein fibers of actin and…

Q: Which item is biggest? A. myosin head B. myofibril C. troponin D. sarcomere

A: Muscles are compact structures made up of highly tensile , strong, long, multinucleated cells called…

Q: Even though calcium is removed from troponin and tropomyosin, please describe in detail what else…

A: The events that result in the contraction of human muscle fiber starts with the signal by a…

Q: Describe the sequence of events by which an action potential in a motor neuron produces an action…

A: Tendons attach skeletal muscles to the bone. Numerous bundles which make up the skeletal muscle are…

Q: What is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: What are the steps and ions involved in muscle contractions ?

A: Muscle contraction can be defined as the activation of tension generated sites within muscle fibers.…

Q: What is the time relationship between a skeletal muscle fiber action potential and the resulting…

A: A skeletal muscle is a part of the “muscular system” of our body. A fiber of a skeletal muscle is…

Q: Which of the following are aspects of the structure of skeletal muscle? Select all that apply.…

A: MUSCULAR TISSUE:- This tissue is different from the rest of the tissue as this tissue can contract…

Q: How can I describe skeletal muscle contraction using the words "upper motor neuron" and "lower motor…

A: Skeletal muscles represent one of the three types of muscles including smooth muscle and cardiac…

Q: List the various Myofibril Structures?

A: Myofibrils are made up of proteins organized into filaments. The filaments can be thick filaments or…

Q: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: Explain Molecular Mechanisms of Skeletal Muscle Contraction?

A: The soft tissue-like structure found in the majority of the animals including human beings is known…

Q: myofibrils or sarcomeres present in smooth muscle fibers?

A: Myofibrils are the long filaments which are arranged parallel to each other to form muscle fibers.…

Q: If you introduced a chemical into a muscle fiber that blocked the voltage-gated calcium channels in…

A: The muscles are the soft tissues found in the animals. They are made up of special types of…

Q: what is a myofibril

A: To describe: To describe myofibril and its structure.

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: Calcium ions are responsible for unmasking of active site on which protein for cross bridge activity…

A: The muscle fibers contain sarcomeres that are the structural units responsible for muscle…

Q: Compare and contrast myofibrils and myofilaments.

A: Muscles are required in breathing, talking, running, walking, and anybody movement. Actin and…

Q: What do you mean by myofibrils?

A: Muscle cells are also referred to as myocytes. These are the cells that made up the muscle tissue.…

Q: Sketch a sarcomere, and describe the function of the major proteins involved in muscle contraction.

A:

Q: How does the cross-bridge result in thin filaments sliding over thick for contraction? Use key…

A: As Cross-bridge is formed myosin head is locked tightly on to an actin filament. Binding of ATP to…

Q: Which of the following is associated with smooth muscle contraction? Troponin as…

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

Q: Myosin II action differs from that of kinesin in that one of the kinesin heads is always in contact…

A: Introduction Motor motion, including as contractions and expansions, is controlled by myosin. Muscle…

Q: list that has the order from the smallest to the larges a) Sarcomere , Myofibrilactin , myosin b)…

A: Correct option: b) Actin, -sarcomere, -Myofibril, -Muscle Fibre

Q: Repetitive stimulation of a skeletal muscle fiber will cause an increase in contractile strength…

A: Skeletal muscles are voluntary muscles. Skeletal muscles are striated because of presence of…

Q: What is the sliding filament theory? How do components of the sarcomere change during a muscle…

A: Muscle is a form of contractile tissue that is arranged into systems in order to maximize…

Q: Myosin binds to actin, then bends. What is ATP needed for next? A. to pump the Ca++ “keys” back into…

A: D option is the correct statement.

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: 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: If individual muscle fibers always contract the entire way when stimulated, how are we able to…

A: A muscle fiber is a long cylindrical cell with multiple oval nuclei just beneath its sarcolemma or…

Q: Skeletal, smooth, and cardiac muscle are similar in that they all _____.   A are divided into motor…

A: SKELETAL MUSCLES SMOOTH MUSCLES CARDIAC MUSCLES They are striated muscles. They are non-striated…

Q: How does the structure of the microfilaments allow for linear contraction of a whole muscle cells?

A: Microfilaments are little, string like protein fibres with a diameter of 3-6 nm. They are mostly…

Q: How could you tell how many cells fused to form a muscle fiber?

A: Muscle fibers are formed from the fusion of myoblasts by the process of myogenesis. They are…

Q: Which of these steps in the production of force by myosin is INCORRECT? The binding of ATP to the…

A: As per our honor code, we are authorized to answer one question at a time, since you have not…

Q: How are myofilaments and sarcomeres of myofibrils related?

A: Muscle is a soft connective tissue found in most animals. A myocyte or a muscle cell is the type of…

Q: What are the steps of the sliding filament model? Select all that apply. Sarcomeres are in a relaxed…

A: Following are the steps of contraction of the disease 1. Release of neurotransmitter at motor…

Q: Which of the following statements is true?a. Fast fibers have a small diameter.b. Fast fibers…

A: The skeletal muscle fibers are of 2 types: slow-twitch muscle fibers and fast-twitch muscle fibers.…

Q: This thick filament motor protein composed of 6 polypeptide chains uses ATP hydrolysis to interact…

A: Skeletal muscles are attached with the skeleton. Muscle is made up of contractile, structural and…

Q: skeletal muscle is packed with myofibrils consisting of a repeating chain of contractile units we…

A: Sarcomere shortens and then the muscle contract. Sarcomere is considered as the smallest unit of…

Q: How does calcium release in the muscle fiber result in the cross-bridge for contraction? Use key…

A: Thin filaments contain the protein actin, nebulin, tropomodulin, tropomysoin and troponin. Troponin…

Q: On the molecular level, why does lifting weights consume energy?  A. To contract a muscle,…

A: ANSWER;- c) To contract a muscle, myosin binds and pulls actin, ATP binding, and hydrolysis are…

Q: Contraction of muscles requires binding of various components of muscle fiber. Which of the…

A: Introduction Muscle contraction can be defined as the activation of tension-generated sites within…

Q: If you were to watch muscle tissue contract: Under a light microscope, would you see the muscle…

A: Muscles play a vital role in the force and motion of the body. They contain protein filaments of…

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.