Sarcomeres that are very long at rest generate low amounts of tension because there is very little overlap between myosin heads and actin filaments. True False

Q: Match each protein with the appropraite myofilament

A: The sliding filament model, developed by Hugh Huxley and Jean Hanson and Andrew Huxley and Ralph…

Q: True or False? Rigor mortis is characterized by continued attachment of myosin heads to actin…

A: Even after death, in absence of oxygen the body may continue to produce ATP via anaerobic…

Q: Actin is sometimes called the "thick" filament. It splits ATP and is responsible for the "power…

A: The movements of different body parts are attributed to the systemic contraction and relaxation 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 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: the given below option what step causes a sarcomere to shorten? cross-bridge formation  calcium…

A: The component of a muscle fiber that contracts is called a sarcomere. Actin and myosin make up the…

Q: Select the correct statements regarding myosin-mediated contraction in the sarcomere. Ca2+ is…

A: Actin and myosin work together to produce muscle contractions and, therefore, movement.

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: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

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: What is the difference between a myofilament and a myofibril?

A: The muscle is a soft tissue that is highly specialized in creating stress, resulting in strength…

Q: a) Why are muscles not in a contracted state all the time? b) Several hours after the death of an…

A: Muscles These are defined as the soft tissues that are involved in the movement of the body and in…

Q: Define myofibril

A: The muscular system is one of the vital systems of the body. It collaborates with the skeletal…

Q: Why does a skeletal muscle cell generate the same amount of tension with each single stimulus? O…

A: Neural control initiates the formation of actin and myosin cross bridges, leading to the sarcomere…

Q: Compare and contrast myofibrils and myofilaments.

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

Q: What is the best description of a contraction of the sarcomere Myosin pushes the actin fibers away…

A: Muscles are the tissue that are responsible for providing the movement to the body. It also…

Q: When a(n) __________ moves along the sarcolemma, the membrane potential changes along the membrane…

A: The sarcolemma is the cell membrane of the muscle cells. When a muscle is stimulated by a neuron at…

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: 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: active muscle tension begins at approximately one hundred percent of resting length for a muscle…

A: Muscle tension is the condition where muscles of the body remain semi-contracted for a lengthy…

Q: TOPIC: FRACTURE - make a relevant and substantial information of the topic/disease; the structures…

A: Fracture- It  is a clinical condition in which the continuity of bone is partial or completely…

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: Embryonic myoblasts fuse to form single muscle fibers during development; thus skeletal muscle cells…

A: Embryonic stem cell is a pluripotent cell which has the ability to differentiate to all other cell…

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: Which of the following is the plasma membrane of the myofiber?

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

Q: There are at least 20 different types of myosin. What properties do all types share, and what makes…

A: Introduction Myosins are a group of motor proteins that play a key role in muscle contraction and a…

Q: List five proteins of the myofilaments

A: Muscle cell  The cell membrane of the muscle fiber/cell is known as sarcolemma. Muscle fibers are…

Q: Skeletal muscle fibers regularly divide by mitosis. True False

A: Muscle tissues are are the types of tissue which have proficiency to extend  , relax , possess…

Q: Tropmyosin and Troponin are called the regulatory proteins in muscle contraction. Describe the…

A: Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils…

Q: Which is the correct order from smallest to largest?     Myofilament, Myocyte, Myofibril…

A: The muscular system is one of the 11 major body organ systems of the body that aids in the…

Q: Why does continuouns calcium release within a muscle fiber cause greater tension? Acticates more…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: Why is myosin II the only myosin capable of producing contractile force?

A: Introduction Myosins are a group of motor proteins that play a key role in muscle contraction and a…

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: Indicate whether the sentence is True or False During the cross-bridge cycle, ATP binding to myosin…

A: Repeated relaxation and contractions in Skeletal muscles are responsible for the movement and…

Q: During the cross bridge cycle, what is the first event that occurs after ATP binds myosin? the power…

A: Introduction : ATPs are high-energy molecules that store the majority of the chemical energy in the…

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: Weight training increases muscle fiber size by increasing the number of myofibrils. Explain

A: Muscles are the organs of the body’s muscular system and there are three distinct types of muscles…

Q: Explain how the filaments of a myofibril interact during muscle contraction.

A: Myofibrils are very small contractile fibres that run in parallel columns along the length of…

Q: Activation of the myosin head is required for contraction and uses one ATP per cross-bridge cycle.…

A: Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils…