During muscle contraction, which of the following processes takes place? Select one: O a. AMP molecules combine with P to form ADP. O b. ADP molecules are broken down to give AMP + P. ADP molecules combine with P to form ATP. O C. O d. ATP molecules are broken down to give ADP + P.

Q: Under what conditions will lactic acid accumulate in skeletal muscle? A. when citric acid enzymes…

A: Lactic acid is the end product of anaerobic Glycolysis where Glucose is oxidised to lactic acid.

Q: Determine whether the following statement regarding the mechanism of the SERCA pump is TRUE (T) or…

A: SERCA, or SR Ca2+-ATPase, is a calcium ATPase-type P-ATPase. Its significant function is to ship…

Q: You discover a mutant mouse whose skeletal muscles do not work properly.  You remove a piece of…

A: Acetylcholinesterase or acetylhydrolase is a cholinesterase enzyme primarily found at neuromuscular…

Q: Which of the following is true? A) Tendons join bone to bone B) Tendons join muscle to bone and…

A: Bone tendons and ligaments are a type of dense connective tissues. All these contains large amounts…

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: Fast-twitch muscle fibers have fewer mitochondria and less myoglobin to store oxygen than…

A: Aerobic respiration is the cellular respiration which occurs in the presence of the oxygen  where as…

Q: A mutation has occurred that prevents ATP from binding from the heads of myosin. What impact would…

A: Mutation is defined as any sudden change in the nucleotide sequence of genes. It may also be defined…

Q: Myofibrils in muscle fibres are made up of repeating units of dark and light bands called: A…

A: The myofibril is a rod-like organelle that is found in muscle cells. Skeletal muscles are made up of…

Q: At low intracellular Ca2+ concentration, _________________ the active sites on the thin actin…

A: Muscular system is one of the body system which aids in contraction and relaxation of muscle so that…

Q: An athlete participates in aerobic exercise three times a week. One of the changes is an increased…

A: During aerobic exercise, the rate of breathing is faster and deeper than when the heart rate is at…

Q: When ATP levels return to normal after intense muscle activity, is creatine predominantly…

A: During intense muscle activity excess and immediate amount of ATP is required, in this case the…

Q: high levels of Pi and no other metabolites, what would you observe

A: Muscle fatigue is a common complaint in clinical practice in humans. Muscle fatigue is known as an…

Q: How are motor neurons involved in muscle contractions? Select all that apply. The release of calcium…

A: It is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord and…

Q: Which of the following thin filament structures directly interacts with the myosin heads to form a…

A: The mechanism of contraction of skeletal muscle was best explained through - "sliding filament…

Q: Skeletal muscles would be expected to contain large numbers of ————— because of their high energy…

A: Skeletal muscles are specialized contractile tissue found in animals. they are found between bones…

Q: During an experiment, the protein troponin from a skeletal muscle fiber was removed. This resulted…

A: The muscle contraction involves interaction between actin (thin filament) and myosin (thick…

Q: If we need ATP for both contraction and relaxation, how would you explain why rigor mortis appears…

A: Rigor mortis is the onset of stiffness in the dead body several hours after the person dies. It is a…

Q: Choose the best description of how myosin and actin are arranged within the two types of protein…

A: In order to facilitate movement, muscles are attached to bones. They function by shortening…

Q: A study of muscle fibers between chimpanzees and humans revealed that although muscle mass per body…

A: Red muscles have slow-twitch fibers which can contract slowly for a long period of time without…

Q: When ADP and Pi are bound to myosin in the cross-bridge cycle... (MULTIPLE SELECT) A. There is no…

A: The cross-bridge cycle of muscle contraction is the process in which the actin filament and myosin…

Q: Which of the following statements about glycolytic fibers is true?

A: There are various types of muscle fibers. Some may be slow oxidative fibers, fast oxidative fibers,…

Q: Thick Filaments contain ⒸA. Actin OB. Troponin O C. Tropomyosin O D. Myosin OE. All of the above

A: Muscular system is a type of body system which is involved in regular contraction and relaxation so…

Q: As ADP and Ⓟ are released from a myosin head,a. actin filaments move toward the H band.b. a…

A: During muscles contraction, energy for the movement of myosin head is obtained by the breakdown of…

Q: b. Gardiac Smooth C. 2. Put the following steps of muscle contraction in order: a. b. C. d. The…

A: The muscle is made up of muscular tissues that consist of muscle fibers specialized for contraction.…

Q: [ANIMAL PHYSIOLOGY] The glycolytic system by which muscles obtain ATP. Select one: O a. relies on…

A: The glycolytic system is not an efficient system for the production of energy since it generates…

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.