Number the following statements in the proper sequence to describe the contraction mechanism in a skeletal muscle cell ( select number from 1 to 12) Action potential (AP) arrive at axon terminal at neuromuscular junction (NMJ) [ Choose ] The muscle cell relaxes and lengthens [ Choose ] SR releases calcium and it binds to troponin [ Choose ] Myosin heads bind to actin and contraction begins [ Choose ] Ion permeability of sarcolemma changes and sodium begins entering muscle cell causing depolarization Calcium flows into presynaptic terminal to initiate neurotransmitter release [ Choose ] AP travels across the entire sarcolemma [ Choose ] Ach is released and binds to receptors on the sarcolemma [ Choose ] Local depolarization (end plate potential) ignites AP in sarcolemma [ Choose ] Troponin moves tropomyosin out of the way of myosin binding sites on actin [ Choose ] AP travels along T tubules [ Choose ] Cross bridge cycling continues until ATP runs out and/or calcium is reuptaken into the SR

Q: Assuming that the mass (weight) of these three different muscles is the same, WHICH most power, for…

A: Understanding Muscle powerA vital component of human biomechanics, Muscular power generation is…

Q: Once an action potential arrives at the neuromuscular junction, there is a sequence of events that…

A: When a muscle fibre is activated, a short electrical signal called an action potential is produced…

Q: During the cross-bridge cycle of muscle contraction, what is the role of troponin? it changes shape…

A: The biological cells possess three movement types. These are muscular, amoeboid, and ciliary. The…

Q: Skeletal muscle cell(key terms: striated, contracting proteins, contractions, nucleus location) One…

A: muscles are the tissues which helps in movement and locomotion . they  contract and relax based on…

Q: Explain the structure and organization of muscle fascicles and the role in generating force include…

A: Bones, ligaments, muscles, tendons, etc. constitute the musculoskeletal system. The body movement is…

Q: Treppe increases skeletal muscle contraction strength by:

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Q: Which protein is responsible for blocking the myosin binding site to actin, while the muscle is at…

A: Myosin and actin slides onto each and plays a major role in muscle contraction..

Q: In relaxed muscle, the myosin-binding site on adin is blocked by ?

A: Step 1 Contractile elements of muscle fibre are myofibrils. They are made up of contractile units…

Q: Hill's equation gives a relation between muscle contraction rates νν and muscle tension TT…

A: We have to rewrite the equation in a form to show that T is dependent on v including T0, alpha and…

Q: Discuss about Ca2+-dependent thin-filament regulation of skel-etal muscle contraction.

A: Movement of skeletal muscle in mammalians show large variability in its functions with their…

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: Order the steps of the sliding filament model from beginning (contracting) to ending (relaxing).…

A: Muscle contraction involves nerve stimuli and action potential. The contraction cycle is powered by…

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: The I band of a sarcomere is widest when a muscle is relaxed true or false

A: Muscular system is a type of body system which is involved in contraction and relaxation of muscles…

Q: skeletal muscles:       0.Troponin has a strong affinity              for Ca2+ Creation of…

A: Muscles There are three type of muscles cell found in human Cardiac muscle cells  Smooth muscle…

Q: Below are data indicating the percentage of muscle fibers (Type I or Type Ilb) for three different…

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Q: I= band at the time of relaxation H= zone at the time of relaxation Sacomere at the time of…

A: During the muscle cell contraction, the sarcomere must shorten. However, thick and thin filaments…

Q: The total tension a muscle can develop depends upon two factors. What  are they?

A: Muscle contraction and relaxation helps muscular system to be function properly. When a muscle…

Q: What structures/s is/are responsible for the banding pattern in skeletal muscle cells? (EXPLAIN)…

A: Striated muscles are generally voluntary muscles that are under the conscious control of brain.…

Q: type. [ Select ] * is striated and involuntarily controlled by the nervous system [ Select ] * has a…

A: Skeletal muscles  : Voluntary muscles  Striated appearance because of alternating dark and light…

Q: Which of the following statements regarding summation in skeletal muscle fibers is true?…

A: The correct options are 2 and 4.In skeletal muscles, the muscle fibers are innervated by motor…

Q: When discussing the hierarchy of skeletal muscle organization, the is the Highest level of…

A: Humans consists of various systems one such system is the muscular system that consists of muscle in…

Q: Discuss how calcium is a signaling molecule that causes the contraction of the sarcomere.  This…

A: In an eccentric contraction of the skeletal muscle, the muscle lengthens under tension because there…

Q: Muscle spindles :-a- are found in all skeletal musclesb- are found only in large skeletal musclesc-…

A: Muscle spindles are sensory receptors that regulate the contraction of muscles by detecting change…

Q: Match the statement on the left with the best response on the right. Breaking the high energy bond…

A: Introduction :  A synapse is a small space that represents the junction between two axon terminals…

Q: As sarcomere shortening progresses during muscle contraction, which structure gets progressively…

A: A muscle contraction:-It can be defined as an increase in the tension of the muscle.-It can also be…

Q: Which of the following muscle fiber types has the highest mitochondrial concentration? A Type Ilb в…

A: Muscle fibers are made up of myofibrils, which are made up of the proteins actin and myosin in…

Q: All the following are necessary for a skeletal muscle cell to full relax, except one. Which answer…

A: Muscle is a delicate tissue found in many creatures. Muscle cells contain protein fibers of actin…

Q: Briefly describe why contraction of the muscle cell is called “sliding filament theory” (what is…

A: During skeletal muscle contraction, a motor neuron stimulates the skeletal muscle fibers. The…

Q: List TWO (2) differences between smooth muscle contraction and skeletal muscle contraction.

A: Muscle cells are intended to produce power and movement. There are three kinds of mammalian muscles…

Q: Put these events that occur in skeletal muscle in the correct chronological sequence: 1. Activation…

A: The membrane potential on the T-tubule membrane is sensed by a protein called the dihydropyridine…

Q: atent phase V [ Choose ] Active return of Ca2+ into SR Ca2+ released from SR Power stroke of…

A: Alpha motor neurons are the neurons which  innervate the skeletal muscle fibers. On entering a…

Q: Describe four muscle proteins and their functions.

A: We can say that Muscle contraction can be described as the process occurring within the muscle…

Q: Part A- Phases of a Muscle Twitch Drag and drop the correct terms in the correct sequence of events.…

A: Muscle contracts when it is stimulated. Contraction of muscle is a physical or mechanical event .…

Q: Describe and explain the sliding filament model of contraction. Be sure to include in your response…

A: Muscle contraction is defined as the tightening, shortening, or lengthening of muscles during an…

Q: 2 T tubule 3. ATP 4. lateral sacs of the sarcoplasmic (c) supplies energy for the reticulum 5.…

A: Muscle contraction begins when the impulse arrives at a particular muscle which is going to be…

Q: What is NOT related to temporal summation for muscle contraction? residual Ca2+ in the muscle…

A: Temporal summation of muscle contraction can be described as a sensory summation involving the…

Q: Order the following steps of muscle contraction: Drag and drop options into correct order and…

A: The action potential is initiated and propagated through the motor neurons to finally reach the…

Q: 6. Identify each of the following structures when given images of skeletal muscle fibers such as the…

A: Muscle is originated from mesoderm. They help in locomotion and movement. There are three types of…

Q: Thick myofilaments contain which of the following? (Select all that apply) troponin actin myosin…

A: Myofilaments are key regulators of the contraction in cardiac and skeletal muscles. The thick-thin…

Q: Which of the following are true regarding length/tension relationships in muscle?

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: The ________ opposes or resist, the action  caused by the prime mover Antagonist  Prime mover…

A: Muscles contract to produce movements and motion. Muscle always works in pair.

Q: Compare and contrast the connective tissue types of loose, cartilage, dense, bone, and blood.

A: As its name suggests, connective tissue connects other tissues in the body by supporting and tying…

Q: Describe the three steps (in detail) and the regions where these steps occur required for a skeletal…

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Q: Arrange the following

A: The sliding filament mechanism describes the mechanism of contraction of skeletal muscles.