Which of the following shortens in length during skeletal mucle contraction? select all that apply Action filaments H- zone A- band  I- band

Q: Light less dense area of sarcomere that contains reminder of thin filaments but no thick filaments…

A: SARCOMERE It is the complicated unit of striated muscle tissue. It is the repeating unit between two…

Q: Muscle contraction can occur when: is it 1,2,3,4? A bands lengthen. myosin filaments shorten.…

A: Muscle is a specialized contractile tissue that is a distinguishing characteristic of animals.…

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: ATP within actin subunits is hydrolyzed after assembly into a filament but before disassembly from…

A: During the lifespan of an F-actin filament, most subunits hydrolyze a single molecule of ATP to ADP.

Q: The power stroke in muscle contraction is the: Group of answer choices product of force and velocity…

A: The cells that make up muscle have the unique capacity to shorten or contract to cause movement of…

Q: Actin filaments in microvilli require the help of myosin so that they can associate with the…

A: The cytoskeleton is defined as a complex, dynamic network of interconnecting protein filaments which…

Q: Which is the order of glycolytic capacity between these muscle fiber types O I> lla > Ilx O Ix > la…

A: The contraction of the muscle fibre is explained by the muscle contraction theory by the 2 muscle…

Q: Note the color of each three types of muscle fiber: slow twitch, fast twitch oxidative and fast…

A: Slow twitch muscle fibers:  Resistant to fatigue  For sustained,smaller movements and control of…

Q: What best explains the inability to fully contract a muscle when the muscle is first shortened prior…

A: Muscle contains muscle fiber cells which are specialized for contraction. The muscle movement is a…

Q: Which of the following are correct     Dynein head elongates like a lever arm.     ATP…

A: Movement of the body part is done by contraction and relaxation of contractile proteins.…

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

A: Skeletal muscle cells are the cells that help us move and are compartmentalized in the body into…

Q: Type II (fast twitch) muscle fibers contain what properties?    Select 2 correct answer(s)…

A: Skeletal system are the major organ system of the human body that provides framework and structural…

Q: Name the stages of sliding filaments in order. Briefly explain each.

A: Sliding filament refers to the theory that describes the contraction of muscles involving actin and…

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: During cross bridge cycling in skeletal muscle, force is created by the power stroke of the: actin…

A: The cross bridge cycling exhibits the shortening of muscles because of the movement of the…

Q: Myofibis in muscle fibres are made up of repeating units of dark and light bonds called

A: Myofibril is a muscle cell that is shaped like a rod. Many chains of Myofibril bound together to…

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: Compare the characteristics of skeletal and smoothmuscle cell contractions.

A: Ans: Skeletal muscle: The skeletal muscle is the form of striated muscle tissue and is one of the…

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: 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: Each of the pairs of phrases below describe steps during skeletal muscie contraction. The 2nd phrase…

A: Muscle tissue is a type of tissue which contain actin , Troponin and myosin proteins so as to allow…

Q: Humming birds and rattlesnakes can contract and relax skeletal muscle very quickly, i.e. in 10-20…

A: In all vertebrates three major types of muscles are present. These are- cardiac muscles, smooth…

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: Which statement or statements describe why depletion of ATP after death leads to rigor mortis?

A: Rigor mortis is the third phase of death. It is one of the unmistakable indications of death,…

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 statements is true?     Fast glycolytic fibers have a small diameter.…

A: Fast glycolytic Fibers:  Fast glycolytic fibers, also known as type IIb fibers, are a type of muscle…

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: Describe the structure of myosin molecules and how theycombine to form a myosin myofilament

A: The myofibrils are comprised of actin (thin filament) and myosin (thick filament). Muscle…

Q: Thick and thin myofilaments have different properties. For each phrase below, indicate whether the…

A: Myofilaments are the parallel striated muscle cells or muscle fibres that constitute the fasicles…

Q: Describe the structural relationships among the following in aresting skeletal muscle fiber: A band,…

A: A sarcomere is defined as the segment between two neighbouring Z - lines . In electron micrographs…

Q: ***** ANTWO 777 • A hands: Dark areas that correspond to the areas where thick filaments are…

A: Sliding filament theory is a mechanism that helps the muscles to contract. Hence according to this…

Q: 5. Diagram the structure and organization of the actin and myosin filaments including the myosin…

A: Note-  As we are allowed to do only one question at a time so I will provide answer to one question…

Q: What step DIRECTLY causes a sarcomere to shorten? cross- bridge formation  calcium transport into…

A: A sarcomere is the unit of muscle fiber responsible for contraction. Each sarcomere is composed of…

Q: Letter C is labeling А Tendon

A: Muscle are basically a soft tissue which have property of undergo contractions with action potential…

Q: Draw a graph of the isometric force–length relationshipof striated muscle, indicating where maximal…

A: Muscles are naturally elastic due to the presence of titin. Tendons attach skeletal muscles to…

Q: Which of the following regions of a sarcomere does not change length during a contraction because it…

A: Skeletal muscles are voluntary muscles. The contraction and relaxation in the skeletal muscle enable…

Q: Question: According to the sliding filament model of contraction, the components of the sarcomere…

A: Given To find the components of sacromere that shorten when muscles contract.

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: Why does continuous calcium release within a muscle fiber cause greater tension? O Activates more…

A: Maximal tension in muscle happens when thick and thin fibers crossover greater extent inside a…

Q: In the structure of a sarcomere, w A-band? actin myosin

A: The basic contractile unit of muscle fiber is formed by the sarcomere. Two main protein filaments-…

Q: Slow-twitch (type I/red) fibers have a distinctive feature:     fatigue easily     relatively…

A: The muscle fibers are multi-nucleated (exclusively in the case of skeletal muscle fibers),…

Q: Why is ATP required for skeletal muscle contraction? Choose all that apply. Release myosin and actin…

A: release myosin and actin and reset the myosin head Attaching ATP to the myosin head initiates the…

Q: Which of the following happens within the sarcomere during muscle contraction?     The myosin…

A: Answer :- Option (A) is correct. - The myosin filaments "walk" along the actin filaments…