3.4. About human skeletal muscle contraction, what are the correct statements? PHYSIOLOGY_basic (OJO) A muscle fiber is made by the parallel apposition of sarcomers. Generation of force relies on the formation of cross-bridges between actin and myosin filaments. In the process of contraction, adenosine triphosphate (ATP) is required both to drive the actin-myosin association-dissociation cycle and to recycle calcium back to the endoplasmic reticulum. Each muscle fiber is innervated by one neuron only. T tubules are plasma membrane invaginations of the sarcolemma that allow excitation-contraction coupling.

Q: /hich statement about muscle contractions is INCORRECT ? Once maximum muscle tension is achieved, no…

A: Muscle contraction occurs when actin and myosin slide past each other. The required calcium for…

Q: Thick filaments are part of the I band contain actin O contain myosin but thin filaments do/are not.…

A: In each microfibril, actin thin filaments and myosin thick filaments are organized into a linear…

Q: 11. Arrange the following in statements in the order that they occur, by adding a number: nf.e ACh…

A: In the above question, given statement is about the mechanism of muscles contraction and relaxation.…

Q: The dark A band of a sarcomere contains regions where the actin and myosin filaments overlap.  True…

A: The sarcomere is the basic unit of muscle fibers that is responsible for the contractile function.…

Q: During sarcomere contraction, which of the following does NOT change length? A the distance between…

A: 1. troponin, tropomyosin and myosin After the release of calcium from the sarcoplasmic reticulum,…

Q: 30- Which of the following is true about muscle contraction: a- Results by the actin sliding along…

A: Muscle contraction us the tightening , shortening or lengthening of muscles when you do some…

Q: Antigarvity muscles maintain stretch reflex for prolonged periods withoutfatigue, because :-a- they…

A: The stretch reflex is a muscle contraction in response to stretching within the muscle. The major…

Q: In relaxed muscle, the myosin-binding site on adin is blocked by ?

A: Step 1 Contractile elements of muscle fibre are myofibrils. They are made up of contractile units…

Q: Myosin heads bend when attached to actin

A: Correct option is C  Myosin heads bend when attached to actin

Q: Arrange the steps of muscle contraction in the correct order Myosin head forms cross bridge with…

A: Tissue comprises structurally and functionally similar cells. It is a level of organization in…

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: Know the Sliding Filament Theory & neurological events leading up to contraction. (i.e. from the…

A: The level of calcium ions in the cytoplasm is controlled by muscle contraction. Calcium ions work at…

Q: In both smooth and skeletal muscle calcium must be actively transported out of the fluid surrounding…

A: As per our honor code, we are authorized to answer only one question at a moment. As you have not…

Q: 34- Which of the following sentences is incorrect: a- Muscle fibers and neurons are similar because…

A: there needs a correction in question part. it is saltatory conduction.

Q: number graded recruitment constant summation contraction Not all muscle contractions are of equal…

A: The muscle fiber helps in the process of muscle contraction, which helps in the movement.  When the…

Q: According to the when its______ Group of answer choices sliding-filament model of muscle…

A: The sarcomere is defined as the region between two Z line. It is the basic fundamental unit of…

Q: Skeletal Muscle Smooth Muscle Cardiac Muscle Striated? [a] [b] [c] [f] # of Cells? [d] [e] Shape?…

A: Tissue comprises of structurally and functionally similar cells. It is a level of organization in…

Q: True or False

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 21. Summarize the events that occur during the Excluation-Contraction Coupling Phase in a skeletal…

A: Neurons are the cellular components of the nervous system that help in nerve impulse transmission.…

Q: 7. Identify each of the following when given images of skeletal muscle fibers such as the ones…

A: The nerve impulses from the axon terminal of motor neuron goes to the skeleton muscles. The junction…

Q: 4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin…

A: Since two questions are asked in this section. It can be possible to answer one question in the…

Q: The terms sarcolemma and sarcoplasm in muscle refer to, in order, cell membrane and myofibril cell…

A: The movement of the body part leading to a change in the position or location of the body is called…

Q: Which of these statements below would NOT BE TRUE regarding skeletal muscle activity? O most muscles…

A: Skeletal muscles are the voluntary muscles which works with the will of a person. These muscles are…

Q: dings forming a neuromuscular junction with a single muscle fiber. Membranes of axonal endings and…

A: Synspse is a structure that permits a neuron  to pass an electrical or chemical signal to another…

Q: Which of the following is NOT correct regarding muscle contraction? A neurotransmitter is released…

A: A muscle is composed of a group of muscle fibers, and the plasma membrane of the muscle fiber is…

Q: The site where the motor nerve impulse reaches the muscle fiber is called the Z lines action…

A: The site where the motor nerve impulse reaches the muscle fiber is called the neuromuscular…

Q: Based on your understanding of skeletal muscle fiber physiology, which of the following processes is…

A: ATP is the adenine tri phosphate and is the instant source of energy .It is used in many of the…

Q: While Colette is researching weight lifting techniques, she finds contradictory information about…

A: Skeletal muscle cells are long and cylindrical, voluntary in action and are referred to as muscle…

Q: The human body has mainly two types of muscle fibres: slow-twitch and fast-twitch.  The { slow or…

A: Individual muscle fibres make up skeletal muscles. Not all muscle fibres are the same, much like…

Q: 6 As calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the…

A: Excitation–contraction coupling: It is a physiological process which involves the conversion of an…

Q: The sliding filament model of contraction involves O the shortening of thick filaments so that thin…

A: The mechanism that takes place within the muscles for contraction is described by the sliding…

Q: Fill in the blank using information available from the diagram above: With every action potential…

A: Various steps during the contraction of a muscle fiber include- - Arrival of a nerve impulse to a…

Q: v a two-state model of a muscle sarcomere - representing relaxed and contracted forms. are your…

A: Muscle fibre consists of A and I bands. These bands are formed due to the regular parallel and…

Q: MULTIPLE ANSWER QUESTIONS. Select all that apply. Which of the following occurs when the muscle is…

A: The sarcomere is the basic unit of a muscle and is dependable for contraction. It is present in both…

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.