Diagram the arrangement of thick and thin filaments in a striated-muscle sarcomere, and label the major bands that give rise to the striated pattern. How does the position of the bands change during muscle 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: 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: Describe the relationship between the resting muscle length and the strength of its contraction.

A: Muscles are stretched even at rest i.e. when muscles are not contracting they are actually stretched…

Q: What are the detailed structures of the skeletal muscle tissue? Including Fascicles to Myofibrils…

A: Skeletal muscle is an organ of the muscular system and it is one of the chief muscle types in the…

Q: which arrangement best describes bipennate muscle?

A: Pennate ( feathers ) muscle are the one's that can hold muscle fibers within them , produce more…

Q: List the Functions of ATP in Skeletal Muscle Contraction?

A: Muscle is a bundle of fibrous tissue, which is present in many higher animal bodies. There are three…

Q: Why might stretching a cramping muscle INCREASE the cramping, as well as why would contracting the…

A: Muscles are the tissues that govern physiological processes by their contraction and relaxation. The…

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

A: Muscle contraction and relaxation is one of the main reasons that aid the movement or locomotion of…

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: Is the length of muscle contraction at the beginning of tetanic contraction the same or different…

A: A tetanic contraction can be defined as a sustained muscle contraction that evokes when the motor…

Q: What happens to the I band and H zone as muscle contracts? Do the lengths of the thick and thin…

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

Q: Summation in a single muscle fibre means that Select one: a. the fibre increases the frequency of…

A: Introduction Muscle contraction:- It is the activation of tension-generating sites within muscle…

Q: Explain how ATP and creatine phosphate function inskeletal muscle fiber contraction.

A: The process of contraction of muscle fiber occurs in a series of events, that initiates with the…

Q: When sarcomeres contract during muscle contraction, which of the following occurs?   A. The myosin…

A: Sarcomeres contract during muscle contraction.

Q: Give the diagram of a sarcomere of skeletal muscle showing different regions?

A: Skeletal muscles are made up of muscle cells. A sarcomere is the unit of the striated muscle tissue…

Q: •What is the role of tropomyosin in muscle contraction?

A: Tropomyosin prevent myosin from continuing to slide up the actin filament.

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: when muscle fatigues, what does sarcomere look like?

A: A group of muscle fibers works together to produce a force. A muscle comprises muscle cell fibers…

Q: what are the events that initiate muscle contraction in order?  start with the neurotransmitter…

A: A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles.

Q: Does the H zone length change when a muscle contracts? Explain.

A: A muscle cell contracts and the the sarcomere shortens . However, the thick and thin filament of…

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 are ion channels affected by receptors that stimulatesmooth muscle contractions? That inhibit…

A: Due to change in membrane potential muscle contraction occur.

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: 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: Which protein has binding sites that the myofilament "head" is able to attach to? Select one: a.…

A: Answer1- d. actin When muscle contracts, the globular heads of the thick myosin filaments attach to…

Q: What are some examples of movement created by the contraction of sarcomeres of the muscle cells?

A: Muscle tissues are of three types: Skeletal muscle, cardiac muscle, and smooth muscle. Each consists…

Q: Draw the diagram of a sarcomere of skeletal muscle showing different regions.

A: Muscle is formed by skeletal muscle fiber and they contain cytoplasm with cellular structures such…

Q: List the phases of a muscle twitch, and describe theevents that occur in each phase.

A: Phases of Muscle twitch:                   When an stimulant action potential travels down through…

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: Which choice lists the components of a muscle from the smallest unit to the largest unit?   A.…

A: Muscles tissue are soft tissues that help the animal body to contract and relax in the way the body…

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…

Q: What creates the striated appearance of a skeletal muscle cells?

A: Muscle tissue can be divided into three major types as cardiac muscles, smooth muscles, and skeletal…

Q: In the sliding filament theory of contraction, what prevents the filaments from sliding back to…

A: Sliding filament theory of muscle contraction: this theory states that sliding of actin filament…

Q: Regarding the muscles, why electric impulses are important in the contraction mechanisms? Explain.

A: Neuromuscular junction or NMJ is accountable for the transfer of electrical signals from the neurons…

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: How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP…

A: Muscle contraction is the contraction of contractile units of muscle fiber or sarcomere, in response…

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: What is the energy utilization involved in causing a muscle to contract ?

A: Muscle contraction occurs when the actin and myosin filaments slide past each other. This process is…

Q: What structure invaginates into the middle of the muscle cell to transport Ca2+ into the middle of…

A: Muscle contraction is a process in which the actin and myosin filaments slide past each other.…

Q: Explain in detail: What does the ‘sliding filament model of muscle contraction’ discuss or explain?…

A: Sliding filament theory of muscle contraction was given by Huxley.  The theory states that two…

Q: Give an example of what types of activities promote each of the three types of muscle fiber: slow…

A: Twitch muscles are the muscles of skeletal system. It helps in providing support and movement. There…

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…

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.