Considering the Length-Tension Relationship of skeletal muscle fibers, over stretching a muscle fiber or not stretching a muscle fiber enough, results ina decrease in force developed (during contraction) because: A. An "over-stretched" muscle fiber or an “under-stretched" muscle fiber will not allow Calcium, from the sarcoplasmic reticulum, to adequately diffuse into the cytoplasm. B. An "over-stretched" muscle fiber or an “under-stretched" muscle fiber will not allow an optimum amount of contact and overlap for the contractile proteins. C. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow the Action Potential to reach the troponin-activation channels. D. An "over-stretched" muscle fiber or an "under-stretched" muscle fiber will not allow the Sodium current to depolarize the membrane.

Q: Compare the composition of flight muscles with a powerful locomotive muscle in terms of…

A: Flight muscles are a type of muscle which is found in birds or insects. This muscle helps birds or…

Q: The mechanism of muscle contraction is best explained by the sliding filament model. According to…

A: Many different forms of cell motions are caused by actin filaments, which are often linked to…

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: While running, we expect the amount of calcium outside the sarcoplastic reticulum, inside the muscle…

A: In this question asked about calcium level in muscle during running.  Detailed solution in step 2.

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: The sliding filament mechanism describes the process during which: a. actin and myosin slide…

A: The muscles of the body serves main role in the movement of the body parts such as legs, arms and…

Q: At right are pictures showing a part①Fully relaxed sarcomere of a muscle fiber of a skeletal muscle…

A:

Q: The correct order for the smallest to the largest unit oforganization in muscle tissue is…

A: Muscle tissues represent the soft tissues present in the many animals. Muscle tissues are composed…

Q: Which of the following statements best describes the sliding filament mechanism of muscle…

A: Actin- It is the main component of thin filament in muscle fibre, cytoskletal protein. Myosin-motor…

Q: Muscle fibers that have a high number of mitochondria, contain largeamounts of myoglobin, and…

A: BASIC INFORMATION  MUSCLE It is a type of soft tissue which are found in most of the animals. The…

Q: Suppose theres a drug that works towards blocking the entry of calcium from the extracellular fluid.…

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

Q: What role (function) does calcium have within a muscle fiber? a. trigger muscle potentials along…

A: Calcium is present in the sarcoplasmic reticulum until and unless it is released by the stimulus. It…

Q: A skeletal muscle can often maintain a moderate level of active tension for long periods of time,…

A: A neuromuscular junction also called the myoneural junction is a chemical synapse between the motor…

Q: Why is the latent period longer during an isotonic twitch of a skeletalmuscle fiber than it is…

A: Muscle tissue is a well-vascularized soft tissue present in the muscles of an animal body. Muscle…

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: Total force in the length:force relationship is the result of a.) ideal overlap between the myosin…

A: The length-tension relationship in muscle tissue describes the force a muscle can generate at…

Q: Which of these statements is true about leg muscle fibers from an Olympic sprinter versus an Olympic…

A: The movement of the limbs is mainly due to the contraction and relaxation of the muscle fiber. The…

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: Explain the following two statements: Muscles can only actively contract; muscle fibers lengthen…

A: The statements "muscles can only actively contract" and "muscle fibers lengthen passively" are…

Q: A muscle cell dies, so that there is no ATP left in the sarcoplasm.  However, there is lots of Ca2+…

A: Rigor mortis is the stiffening of a dead body after hours of death. The word translates into…

Q: Summation in a single muscle fibre means that Select one: a. the fibre increases the frequency of…

A: Introduction Muscle contraction:- It is the activation of tension-generating sites within muscle…

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 figure seen here represents which type of muscle fiber? a.) Type IIx- very fast, fatigable b.)…

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

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 functions of tropomyosin in skeletal muscle include                 A. releasing calcium ions…

A: Skeletal muscles are muscles that work along with the skeletal system and are present in close…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: Recently, it has been observed that several muscle diseases and disorders are linked to problems…

A: Some individuals with inherited genetic mutations are susceptible to malignant hyperthermia. Certain…

Q: An increase in the cross sectional area of muscle is known as hypertrophy. Hypertrophy allows muscle…

A: The question given is about hypertrophy. Hypertrophy is defined as an increase in tissue mass caused…

Q: Suppose a person had an unusual mutation in the troponin protein of his skeletal muscles, such that…

A: The muscular system is a system of muscles where muscles are connected to bones and also to envelope…

Q: A) tetany is rapid spasm in the muscle. B) Tetany is usually caused by an increase in the blood…

A: Introduction: Tetany occurs in muscles that have no absolute refractory phase. The heart's muscles…

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: 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: a. Individual organ a. myofibril b. An individual cel b. muscle c. A bundle of proteins c. fascicle…

A: Introduction: Skeletal muscles are voluntary muscles as their relaxation and contraction are under…

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: 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: Which of these statements about the molecular structure of myofilaments is true?a. Tropomyosin has a…

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

Q: Describe the process of skeletal muscle contraction, beginning with an action potential in a motor…

A: Skeletal muscles are voluntarily controlled.

Q: The size of a motor unit (i.e., the # of muscle fibers innervated) can directly influence which of…

A: Motor unit This unit constitutes a motor neuron and all of the skeletal muscle fibers innervated by…

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: 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: Part B Matching Choose the appropriate words or phrases from column "B" that match the terms in…

A: The muscle tissue is one of the tissues in the body that helps in movements. The muscle is of three…