Briefly explain ultrastructrure of myofibril.

Q: Briefly explain how does cross-bridge formation affect muscle force.

A: During muscle contraction, a force is generated in the muscle. This is termed the muscle force. This…

Q: What is isovolumetric contraction?

A: IT IS THE CONTRACTION IN WHICH THE VENTRICLES CONTRACT AND THE VOLUME OF THE VENTRICLE REMAINS…

Q: What would happen if ATP suddenly were not available after the sarcomere had started to shorten?

A: The muscular framework is an organ framework comprising of skeletal, smooth and cardiac muscles. It…

Q: Explain why stretching exercises may reduce the incidence of muscle injuries?

A: Skeletal muscle injury represents the great part of all traumas in sports medicine, with an…

Q: What is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: List five proteins of the myofilaments

A: We know that Muscles are the soft tissue found in our body. Muscles work to create strength and…

Q: Describe the general structure of a skeletal muscle.

A: The Muscle is a soft tissue that is responsible for producing force and motion facilitated by the…

Q: List the various Myofibril Structures?

A: Myofibrils are made up of proteins organized into filaments. The filaments can be thick filaments or…

Q: Identify the structure highlighted in green: 三三園 Sarcolemma Myofibril Sarcoplasm

A: The image given is of  excitation-contraction coupling mechanism in skeletal muscle.

Q: How do calcium ionsparticipate in musclecontraction? Why do bothmuscle contraction andmuscle…

A: Muscle contraction is the process of activating tension generating sites in the muscle fibers.…

Q: Relate tension production to the length of a sarcomere?

A: Muscles are involved in the movement of limbs by itself undergoing contraction and relaxation.…

Q: Describe the structural features of a neuromuscular junction andthe role of acetylcholine in…

A: Introduction  Complex organisms such as Multicellular organisms needs control and coordination…

Q: List the three typical stages of a muscle twitch, as seen in amyogram.

A: Myogram is a graphic representation of the phenomena of muscular contractions.

Q: Describe the location, structure, and function of the sarcoplasmicreticulum in skeletal muscle…

A: Muscles are required in breathing, talking, running, walking, and for any body movements. Actin and…

Q: Describe the neural control of skeletal muscle contraction.

A: Muscle is a type of soft tissue that is located in most animals. The cells consist of protein…

Q: Illustrate the Mechanics of Single-Fiber Contraction?

A: A muscle fiber is a cylindrical, single, multinucleated muscle cell composed of numerous myofibrils…

Q: Describe the gross structure of a skeletal muscle.

A: The muscles with alternate light and dark bands which remain associated with the skeleton and can…

Q: what is a myofibril

A: To describe: To describe myofibril and its structure.

Q: Discuss ATP-driven myosin movement along actinfilaments.

A: The actin filament is linear globular actin polymer subunits. These occur as microfilaments in the…

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: If a single twitch of a skeletal muscle fiber lasts 40 msec, what action potential stimulation…

A: In human physiology, skeletal muscle is defined as the vital organ of muscular system which is also…

Q: Explain myosin regulatory lightchain

A: When a cell is destined for division, first its nuclear content would be shared between cells. It…

Q: name the major proteins of a muscle fiber and state thefunction of each

A: Tendons attach skeletal muscles to the bone. Numerous bundles which make up the skeletal muscle are…

Q: Compare and contrast myofibrils and myofilaments.

A: Muscles are required in breathing, talking, running, walking, and anybody movement. Actin and…

Q: Trace the conduction of muscle impulses along muscle fibers.

A: The heart refers to the organ that pumps the blood, thereby delivering nutrients and oxygen to all…

Q: Describe the effect of increasing the load on a skeletal muscle fiberon the velocity of shortening?

A: A skeletal muscle is a type of muscle that remains attached to the skeletal system i.e. bones in the…

Q: What do you mean by myofibrils?

A: Muscle cells are also referred to as myocytes. These are the cells that made up the muscle tissue.…

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: Define and describe hypertrophy of skeletal muscles. Whatconditions stimulate it?

A: Hypertrophy is described as a condition where there is an increase in the skeletal muscles. This…

Q: explain why the force of a muscle contraction dependson the muscle’s length prior to stimulation.

A: The length-tension relationship of our human muscle states that specifically, the isometric tension…

Q: State the function of myofibrils.

A: Muscle is a soft tissue observed in maximum animals. The characteristic of muscle is to provide…

Q: Place these structures in order from LARGEST structure to SMALLEST: A) Myofibril  B) Myofilament…

A: Each skeletal muscle is an organ that consists of various integrated tissues. These tissues include…

Q: In light of the "all or none" law of muscle contraction, how can you explain the graded response?

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

Q: Myosin myofilaments area. attached to the Z disk.b. found primarily in the I band.c. thinner than…

A: The actin-myosin interaction is most commonly known for its role in sliding filament theory, where…

Q: Which of the following is required for contraction of myofibrils? Select one: a. bicarbonate ions b.…

A: Introduction:- Myofibrils are relatively small contractile fibres that run in parallel columns along…

Q: What voltage produced maximal contraction of this muscle?

A: Muscle is a soft tissue which is found in most animals. They are helpful in providing movement and…

Q: How are myofilaments and sarcomeres of myofibrils related?

A: Muscle is a soft connective tissue found in most animals. A myocyte or a muscle cell is the type of…

Q: Explain the organization of myofibrils, myofilaments, and sarcomeres

A: Muscular tissues consists of muscle fibers having the properties of contraction. Muscular tissues…

Q: List five proteins of the myofilaments and describe their physical arrangement.

A: In muscle cells, myofilaments are the three protein filaments of myofibrils.

Q: Why is it advantageous to have a highly folded sarcolemma at the motor end plate?

A: Neuromuscular junction is area or junction or connection between the end of the motor nerve plate…

Q: Place the following gross anatomic and microscopic anatomic structures in order from largest to…

A: The cells are the primary unit of life. The cells collectively form tissues. The tissues with the…

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.