The mechanism of muscle contraction is best explained by the sliding filament model. According to this model, thin ___i___ filaments slide over thick ___ii___ filaments. The statement given above is completed by information in row   Row i ii A. myosin actin B. myosin myosin C. actin actin D. actin myosin

Q: Select one or more: - a. No tension can be generated. b. Both contractile and elastic forces…

A: Stretching helps to keep our muscles flexible, strong, and healthy, and its very much needed for…

Q: Muscle contraction results from interactions between thin filaments, composed mainly of the…

A: Actin Myosin ATP

Q: When a skeletal muscle cell contracts and the muscle shortens,

A: During muscle contraction, some myosin heads bind to actin (forming crossbridges) while others…

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: During a concentric contraction of a skeletal muscle fiber, myofibrils a. lengthen. b. remain the…

A: Muscle fibers are composed of myofibrils. The myofibrils are made up of myosin and actin filaments…

Q: Which region of the sarcomere does not change length between muscle relaxation and muscle…

A: Muscle is a kind of tissue as it is made up of group of cells. It is one of the four kind of primary…

Q: Which of the following statements about the connective sheath of skeletal muscle is false? a. the…

A: Muscle system is one of body system  which concerned with the contraction and relaxation of muscle…

Q: Match the following terms with the correct definition._____ Z-disc                              a.…

A: The arrangement of the thin actin and the thick myosin filaments in the sarcomere which lies on the…

Q: If you compare electron micrographs of a relaxed skeletal muscle fiber and a fully contracted muscle…

A: Muscle is a type of connective tissue that exists in both animals and humans. Muscle cells are made…

Q: During muscle isometric tension, the maximum tension occurs when: O a. There is no overlapping…

A: Isometric contraction occurs when muscle length remains relatively constant as tension is produced.…

Q: The function of Ca2+ in skeletal muscle contraction is toa. cause an allosteric change in myosin so…

A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…

Q: During muscle contraction, calicum ions bind to A. Actin Filaments B. Tropomyosin C. Troponin D.…

A: C. Troponin   During muscle contraction, calcium ions bind to the regulatory protein troponin, which…

Q: Which of the following statements about the microscopic structure of smooth muscle fibers is…

A: Muscles have a vital role in the body. Muscles do a lot for our bodies as well. They circulate blood…

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: Considering the force of contraction of a skeletal muscle fiber,wave summation occurs because ofa.…

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of myosin and…

Q: Muscle fibers contractions differ with regard to tension and shortening. When a muscle Fiber begins…

A: Isometric and isoconcentric

Q: The decrease in active force that occurs at lengths longer than the optimal length is caused by: O…

A: According to the question, the decrease in active force that occurs at lengths longer than the…

Q: The protein whose removal enables myosin to bind actin in smooth muscle is: (pick one from 1-5).…

A: Smooth muscle: Smooth muscle is present throughout the body, where it serves a variety of functions.…

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

A: Sarcomeres contract during muscle contraction.

Q: Which of the following describes a similarity between cardiac and smooth muscle cells?a. An action…

A: Introduction: The soft tissue present in mammals is muscle. The muscle cells comprise protein…

Q: When a skeletal muscle fiber undergoes a concentric isotonic contraction,a. M lines remain the same…

A: When the mesodermally derived muscle tissue encounters any changes in either their length or the…

Q: A muscle has a limit to how much it can contract, based on the limit of contraction of each…

A: The study of the human body can be divided into anatomy and physiology. The anatomy studies about…

Q: The actin myosin bond is broken by the attachment of A. Tropomyosin B. Phosphate C. ATP D. ADP

A: Myosin and actin filaments are two types of proteins involved in muscle contraction. Myosin is a…

Q: Which of the following is the site of calcium ion storage within muscles? a. T tubules b.…

A: Muscles are the body tissues that are principally accountable for causing movement in the body.…

Q: if, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a…

A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…

Q: Which of the following is arranged in order from smallest tolargest?a. Motor unit < sarcomere…

A: When a nerve impulse travel to the muscle contraction that is an action potential causes the muscles…

Q: According to the sliding filament model, when muscles contract,a. sarcomeres shorten.b. myosin heads…

A: Answer is option e.

Q: The ability of a muscle to generate tension immediately after stimulation is dependent on: a. myosin…

A: Muscle contraction is the enactment of tension-creating sites inside muscle strands. In physiology,…

Q: The repetitive contraction unit in muscle cells is called: Select one: O a. A Band O b. Fibril O c.…

A: There are types of muscle fibers: Skeletal muscle fibers, Smooth muscle fibers and cardiac muscle…

Q: Match each description to the correct phase of a muscle twitch 73. Sección Ca2+ transported back…

A: Muscle contraction happens when the slender actin and thick myosin fibers slide past one another. It…

Q: The actual contractile units of muscle, called _____, extend from middle of one _____ to middle of…

A: Muscles are referred to as the soft tissue of the body, contraction, and relaxation of the muscle is…

Q: Match the appropriate definition to the appropriate vocabulary word. The muscle that contracts and…

A: The muscle that contracts and causes desired action -- Agonist The muscle that assist the primer…

Q: During muscle contraction, binding sites for myosin are uncovered by the movement of A. Tropomysin…

A: A. Tropomyosin   During muscle contraction, the binding sites for myosin on the actin filament are…

Q: Which of the following statements about smooth muscle is correct: Select one: a. Endothelial…

A: Muscular tissue is an important specialized tissue that is present in animals and aid in the…

Q: Describe what is happening to the following parts of a sarcomere during muscle contraction. a. H…

A: H band or H-zone is the central region of the A zone. H zone only contains thick filaments i.e.…

Q: When neurotransmitters contact a muscle cell's receptor proteins, those receptors change their shape…

A: Introduction: Receptors:Receptors are specialised structures that can be found in the cell membrane.…

Q: When the length of the muscle stays the same but the force increases during contraction it is…

A: The muscular system of the body is made up of three distinct types of muscle fibers which differ…

Q: What do skeletal muscle contractions share in common with smooth muscle contractions?a. Both types…

A: The skeletal muscles are a form of striated muscle under voluntary control of the somatic nervous…

Q: Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple…

A: Skeletal muscle is found tethered to bones. It has fibers with many nuclei. Skeletal muscles are…

Q: The structure (a specialized synapse) that allows neurons to control our skeletal muscle fibers is…

A: Neuromuscular junction

Q: the statements that are true about the structures in the image:

A: Q1. The true statements are:1. The sarcolemma is the specialized plasma membrane of a muscle cell.2.…

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.