What is the fundamental contractile unit of skeletal muscle? b. What are the names of the bands, lines and zone of the contractile unit of skeletal muscle? c. Each of the contractile unit region names in (b) contains a letter. What does each of these letters stand for? d. What changes occur in the contractile unit regions during contraction?

Q: What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal…

A: Muscles are the tissues able to contract in response to stimuli.

Q: Do both skeletal and cardiac muscle have a striated appearance? Explain?

A: Muscles are the soft tissue that has filaments to change its shape and length. The filaments present…

Q: Without ATP, relaxed muscle cannot contract and a contracted muscle cannot relax. Explain why.

A: The actin and myosin filaments are linked with several types of cell movements. The myosin converts…

Q: Name at least two distinguishing histological characteristics of smooth muscle as seen in a…

A: Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic…

Q: f a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative…

A: T tubules or the transverse tubules are the extensions of the cell membrane that penetrate into the…

Q: What is Cardiac muscle ? Explain the functions of Cardiac muscle ?

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

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: At the level of the sarcomere, explain the sliding filament model for how muscle contracts

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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: What do smooth muscle plasma membranes contain?

A: BASIC INFORMATION  MUSCLE It is a type of soft tissue which are found in most of the animals. The…

Q: Gather information on the structure and function of skeletal, cardiac and smooth muscle. Combine all…

A: Actin can exist in two forms—one, G-actin, is globular; the other, F-actin, is fibrous.

Q: Describe the major events that occur when a muscle fiber contracts. Include all chemicals,…

A: Numerous bundles which make up the skeletal muscle are called fascicles and each of these is…

Q: Compare the inner layer of smooth muscle with circumferentially running muscle cells,to the outer…

A: Internal soft organs have visceral smooth muscle in their walls (viscera). Muscle cells are joined…

Q: Explain why cardiac muscle cannot undergo tetanic contractions?

A: Cardiac muscles are the muscles present in the heart. They are involuntary in action which means…

Q: ongue ana respo 0. Where are the nuclei located in the muscle fibres (cells)?..

A: According to Bartleby's policy, when multiple questions are posted we can only answer the first…

Q: What factors determine the duration of an isotonic twitch in skeletal muscle? An isometric twitch?

A: To a single action potential, twitch is the mechanical response of a muscle fiber. Before the…

Q: Identify the structure of the muscle fiber as indicated by the arrow in the image.

A: Muscle fibers are cylindrical muscle cells that formed by the fusion of developmental myoblasts and…

Q: What are Regulatory Molecules That Mediate ExerciseInduced Changes in Muscle?

A: Muscle is soft tissue and consists of protein filaments of myosin and actin. These filaments slide…

Q: As skeletal muscle shortens with contraction, the length of the I band remains constant as the…

A: Muscle contraction is defined as the process of stimulation of tension generation sites present…

Q: Why is the innervation of single-unit smooth muscle often restricted to only a few cells in the…

A: Smooth muscle (also known as visceral muscle because of where it is found) is one of the three major…

Q: Muscles that maintain posture are composed primarily of what type of skeletal muscle fibers?

A: Skeletal muscle fibre basically refers to the multiple bundles of the fibres that are joined…

Q: structural organization of muscle fibers makes it possible to produce contractile force

A: Answer: Sarcomere of Muscles fibre or myofibre is the basic contractile unit of skeletal muscle.

Q: 79. Identify the muscle tagged by the arrow? 80. State two actions for the muscle tagged by the…

A: 79. The muscle which is tagged by the arrow is the extensor digitorum longus. 80. The two actions of…

Q: 1. What progressive muscle relaxation performed in Two scenarios shown in the picture?

A: Introduction:- Muscles is soft tissues. Many stretching fibers make up muscles.humna body's have…

Q: a. At what time point did would a nerve begin to fatigue? Comment on the percentage decrease in…

A: Introduction Muscle fatigue:- It is a decrease in maximal force or power production in response to…

Q: Identtidy which among the list represents the hierarchy of muscle structure from the largest unit to…

A: Muscles are connected to bones by means of tendons. They contract to produce movement and thus help…

Q: Mention the two main proteins of the skeletal muscle with their subdivisions

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Q: What are the three muscle types shown in slide 2 (between cardiac, skeletal, and smooth)? Label A,…

A: The muscle is soft tissue and has a fibrous makeup. This tissue helps the body to maintain and aid…

Q: A.What type of contractions do skeletal muscles do? B. What type of contractions do cardiac muscles…

A: Muscles are usually of three types that is Skeletal,smooth and cardiac  Skeletal muscles are found…

Q: What is represented on the image above? (A) A cross-section of a cardiac muscle B A longitudinal…

A: Introduction Muscles are soft tissues, Many, stretchy fibers make up our muscles, muscle is a group…

Q: Explain what the zone of overlap is, and how it contributes to muscle contraction (hint: include…

A: We are answering the first part only. For rest of question pls repost.

Q: Graph A in this diagram represents A) summation and tetanus of a smooth muscle fibre. C) a simple…

A: Skeletal muscles Skeletal muscles are attached to the body part which is involved in movement like…

Q: isotonic and isometric  contractions.

A: The particular organ system, which consists of several types of cardiac, skeletal, and smooth…

Q: Why do smooth muscle fibers in cross section have different diameters and why do some of these fail…

A: Smooth muscle fibres are involuntary muscle fibres present in organ which shoe contractions to…

Q: For the hierarchy of skeletal muscle organization, which accurately lists the order of structures…

A: The smallest functional unit of skeletal muscle organization is sarcomere. It is a highly organized…

Q: Which statement about striated skeletal muscle is true?   A. The tension generated by a muscle is…

A: Muscle  contains muscle fiber cells which are specialized for contraction. Based on location,…

Q: a) Describe how the isolated muscle behaved as it was stretched progressively. b) What effect…

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Q: 22. There are three types of muscle fibers, which differ in terms of how fast they contract and how…

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Q: How is a muscle designed for overcoming greater load different from a muscle designed for sustaining…

A: Skeletal muscle adapts itself with mechanical overload by increasing the size of the muscles. During…

Q: If a muscle is contracted and shortening, what happens to the following: (a) width of the A band,…

A: A myofibril has light bands (A-bands or anisotropic bands) and dark bands (I-bands or isotropic…

Q: What are two observable differences in shape and size of nuclei of the muscle fibres compared to…

A: The nucleus is a central organelle of the cell, containing most of the cell's genetic material. It…

Q: Name the characteristics of muscles. Name the muscle functions. Name the types of muscles and…

A: As per our honor code we are authorized to answer only one question at a moment. In case you need…

Q: Define the term Dilation of Muscle Capillaries?

A: The muscle capillaries are regularly in the state of contraction and relaxation. This contraction…

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.