What step DIRECTLY causes a sarcomere to shorten? cross- bridge formation  calcium transport into SR calcium release  power stroke myosin heads in high energy state

Q: Light less dense area of sarcomere that contains reminder of thin filaments but no thick filaments…

A: SARCOMERE It is the complicated unit of striated muscle tissue. It is the repeating unit between two…

Q: What intracellular protein of smooth muscle cells binds calcium and leads to contraction?…

A: Smooth muscles or involuntary muscles are types of muscles found in visceral organs. These…

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: depolarization of the transverse tubules (T-tubules) promote

A: Every cell in the body has a cell membrane which separate it from the external environment of the…

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: Elite sprinters have a high concentration of muscle fibers with the fastest cross-bridge cycling and…

A: Different kinds of muscles are present in the body, which help in locomotion and movement. These…

Q: Even though calcium is removed from troponin and tropomyosin, please describe in detail what else…

A: The events that result in the contraction of human muscle fiber starts with the signal by a…

Q: similar to peak bone mass: approximately 30 Similar to menopause: approximately 50 Into the 60's…

A: Muscle hypertrophy is the natural phenomenon of an increase in muscle mass. The decline in muscle…

Q: Neurons controlling skeletal muscle contraction are which type? Multipolar motor neurons Bipolar…

A: The neurons are classified into different categories on the basis of certain features. They can be…

Q: Why does a skeletal muscle fibers always produce the same amount of tension with a single stimulus?…

A: Muscle is a delicate tissue found in many creatures. Muscle cells contain protein fibers of actin…

Q: Smooth muscle cells lack transverse tubules. True or False True False

A: Muscles constitute a set of specialized tissues which play an important role in body movements along…

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: Identify the structures within this sarcomere. A band M line Z line Myosin H zone I band Actin H |||

A: MUSCLE CONTRACTION-When you perform an activity, your muscles are tightened, lengthened, or…

Q: What happens as a result of the movement of tropomyosin? O Calcium is pumped into the sarcoplasmic…

A: The sliding filament theory is proposed to explain the mechanism lying in the contraction of…

Q: During muscle contraction, what does calcium bind to in skeletal muscles? Tropomyosin O Actin Myosin…

A: Skeletal muscles are one of the major type of muscle where it works under the voluntary control of…

Q: Why are calcium ions so important for the muscle contraction process

A: Muscle contraction is a process carried out by the interaction of the actin and myosin proteins. It…

Q: Which of the following correctly states the importance of an action potential to muscle contration?…

A: Muscle contraction helps in the movement of muscles. It causes the muscle fibers to contract to…

Q: Fast twitch muscle fibers have lower force production than slow twitch.     True   False

A: Introduction:- The muscular system is an organ system that connects bones, tendons, and heart…

Q: Release of calcium from the terminal cisternae Binding of acetylcholine to the acetylcholine…

A: Adenosine triphosphate is a natural compound and hydrotrope that gives energy to drive many cycles…

Q: IIT Skeietal ction, calcium O increases action potential transmission along the sarcomere releases…

A: Skeletal muscle responds to the nerve impulses received by it. Contraction of muscles is the…

Q: Label the molecular components of the myofilaments from a close up view of a model of a relaxed…

A: Sarcomere: A sarcomere is the essential contractile unit of a muscle fiber. A sarcomere is made out…

Q: Tetanus is a phenomenon where muscle fibers are continuously contracted. What best explains this?…

A: Tetanus is a sustained muscle contraction evoked when the motor nerve that innervates a skeletal…

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: Calcium is the trigger for contraction of all muscle types. How does its binding site differ in…

A: In the human body, there are three types of muscles, skeletal muscles, cardiac muscles, and smooth…

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 of the following is NOT a microscopic change associated with strength training? increased…

A: Strength training is practiced to increase the endurance of a person. To do this, an outside…

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: Which of the following is associated with smooth muscle contraction? Troponin as…

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: In the absence of _____, a contracted skeletal muscle will not relax but will develop rigor mortis…

A: Introduction After the death of an individual, several changes take place inside the dead body. The…

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: T-tubules are invaginations of the sarcolemma of a muscle cell. True or False True False

A: The skeletal muscle cell (myocyte) contains sarcoplasm surrounded by sarcolemma. It comprises…

Q: Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back…

A: The muscle tissue present in the human body is primarily responsible for the movement in the body.…

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: arcoplasmIC hypertruphy a liml SIZE training? It adds more actin and myosin. It decreases glycogen…

A: Sarcoplasmic Hypertrophy  Cytoplasm of the muscle fiber or cell is referred as Sarcoplasm .…

Q: Contractile muscle cells cannot be created in culture.     True     False

A: Contractile muscle cell present in body as a skeletal muscle, smooth muscle and heart muscles. The…

Q: Put the steps of excitation-contraction in order: 1 Myosin "heads" pivot, cause [ Choose ] Calcium…

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

Q: What contains troponin, is involuntary and intracellular calcium is necessary in muscle contraction?…

A: Calcium lets out from the sarcoplasmic reticulum through calcium particle channels when the membrane…

Q: Arrange the following in statements in the order that they occur during muscle contraction: 1-10…

A: Muscle contraction is the activation of tension-generating sites within muscle fibers. It does not…

Q: Compared to skeletal muscle, smooth muscle None of the choices are correct Has equal thick and thin…

A: Similar to skeletal muscle, smooth muscle's main job is to contract. To produce movement, however,…

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…

Q: Why does damage to upper motor neurons cause spasticity and muscle cramps? Extracellular calcium is…

A: Spasticity is defined as a condition or state in which the muscles will stiffen or tighten thus,…

Q: In the structure of a sarcomere, w A-band? actin myosin

A: The basic contractile unit of muscle fiber is formed by the sarcomere. Two main protein filaments-…

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.