During which step of a muscle contraction cycle is ATP needed? when myosin head does a power stroke and release of calcium ions into sarcoplasm when myosin head detaches from actin and release of calcium ions into sarcoplasm when myasin head does a power stroke and pumping of calcium ions back into SR when myosin head detaches from actin and pumping of calcium ions back into SR

Q: Muscle contraction can occur when: is it 1,2,3,4? A bands lengthen. myosin filaments shorten.…

A: Muscle is a specialized contractile tissue that is a distinguishing characteristic of animals.…

Q: During the cross-bridge cycle of muscle contraction, what is the role of troponin? it changes shape…

A: The biological cells possess three movement types. These are muscular, amoeboid, and ciliary. The…

Q: This mineral allows sarcomeres to contract resulting in muscle contraction.           potassium…

A: The muscles are the part of body which is responsible for producing movements

Q: What is the first and most direct energy source for muscle con￾traction? a. glucose b. ATP c.…

A: Answer- The muscle contraction is the crutial step in the movement and locomotion.

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: What causes a muscle cell to contract? A) ATP forms a bridge binding actin to myosin. B) Calcium…

A: The muscular system is made up of muscle tissue and is responsible for functions such as maintenance…

Q: What happens when troponin and tropomyosin block the active sites of actin? O The muscle contraction…

A: Troponin is basically a complex of three regulatory proteins which are troponin I, troponin C, and…

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: What is the function of calcium in muscle contractions? to bind to troponin and change its…

A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type 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: Describe the role of both ATP and calcium ions in muscle contraction.

A: Muscle contraction can be described as a process triggered by an action potential transported…

Q: In an isometric contraction the muscle develops tension but does not - exhibit elasticity does not…

A: * there are three types of muscle contractions present  are:  Concentric  Eccentric Isometric…

Q: an isotonic concentric contraction, muscle length shortens muscle tension exceeds the force of the…

A: Concentric and eccentric isotonic contractions are the two forms of isotonic contractions. The…

Q: The following are the basic steps of a muscle contraction:               I.  Neurotransmitters bind…

A: Muscle tissue is responsible for movement. There are found three types of muscles: Skeletal,…

Q: Which of the following factors can help to increase contractile force? small load large muscle…

A: Introduction Muscle contraction is defined as the tightening, shortening, or lengthening of muscles…

Q: During which phase of a twitch in a muscle fiber istension the greatest?a. resting phaseb.…

A: The phenomenon of lifting or moving an object (load) involves the sarcomeres present in the muscle…

Q: Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular…

A: Muscles are tissues that can contract and expand. The muscles can be grouped into three types based…

Q: Graded muscle contractions ________. depend on activation of more and more motor units depend…

A: Muscle cells are made up of two key protein filaments called actin and myosin. These proteins are…

Q: place the events that occur during muscle contraction and relaxation in their proper order.  Insert…

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

Q: What is the main role of the sarcoplasmic reticulum in muscle contraction? produce calcium store…

A: The sarcoplasmic reticulum (SR), which is comparable to the smooth endoplasmic reticulum in other…

Q: The events during the leg phase of a muscle fiber twitch begin with................ and end…

A: Muscle is a soft and contractile tissue that is responsible for body movement. Muscle cells consist…

Q: what are the events that initiate muscle contraction in order?  start with the neurotransmitter…

A: A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles.

Q: During muscle contraction, which of the following processes takes place? Select one: O a. AMP…

A: Please follow step 2 & 3 for detailed explanation.

Q: In the process of muscle contraction, which of the following steps immediately comes after the…

A: Muscle contraction can be defined as the activation of tension-generating sites within muscle…

Q: Which of the following is true when a muscle is at rest: calcium ions bind to the troponin complex…

A: Muscle contraction is the activation of tension-generating sites within muscle cells.

Q: ATP is needed during which of the following phases of a muscle twitch? relaxation period latent…

A: A muscle twitch is an uncontrollable contraction of the muscle fibres. Muscle fibres are controlled…

Q: Which of the following statements are true? Multiple Choice Muscles work in antagonistic pairs…

A: Tissue is the next level organization of the cells. There are 4 different types of tissue are…

Q: Acetylcholinesterase is the enzyme that breaks down and inactivates acetylcholine. Some nerve gases…

A: Nerve gas binds to acetylcholinesterase enzyme but only at 1 site. Nerve gas has a phosphorus group…

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: Skeletal muscle cells have the ability to do all of the following EXCEPT _____.     activating…

A: Skeletal muscle is a type of three major muscle types, the others being cardiac muscle and smooth…

Q: How is the list below to be properly put in order to describe a muscular contraction?

A: Muscle contraction can be defined as the activation of tension-generating sites that are present…

Q: Describe what is happening to the following parts of a sarcomere during muscle contraction. a. H…

A: H band or H-zone is the central region of the A zone. H zone only contains thick filaments i.e.…

Q: Which of the following would NOT occur as a result of regular exercise to a specific muscle group…

A: The exercising involves the training of muscles by putting heavy load on them, due to exercising the…

Q: Which of these statements are TRUE regarding fast-twitch fibers? S1 = Fast-twitch fibers contract…

A: Skeletal muscle fibres come in two varieties: 1. slow-twitch and 2. fast-twitch. Fast-twitch muscle…

Q: A muscle gets longer during this type of contraction  Concentric Contraction Cool Down Cycle…

A: Muscle  It is a bundle of fibrous tissue in human that has an ability to contract, producing…

Q: Which of the following happens within the sarcomere during muscle contraction?     The myosin…

A: Answer :- Option (A) is correct. - The myosin filaments "walk" along the actin filaments…

Q: In a resting (non-contracting) muscle, what is the position of myosin? It is attached to the…

A: Skeletal system that present in our body is responsible for our movement and locomotion. That's why…

Q: In some fitness exercises you will build muscle mass but do not train the muscle to be effective.…

A: Muscle buildup is important for the development of strength and agility. Muscle buildup is basically…

Q: How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP…

A: Muscle contraction is the contraction of contractile units of muscle fiber or sarcomere, in response…

Q: How would ine generate more muscle tension to pick up something heavy? Increase activation of motor…

A: The nervous system is one of the vital systems of a body. It is a system of nerves which carry…

Q: skeletal muscle is packed with myofibrils consisting of a repeating chain of contractile units we…

A: Sarcomere shortens and then the muscle contract. Sarcomere is considered as the smallest unit of…

Q: Smooth muscles relax when: a) myosin kinase phosphorylates the myosin head b) myosin phosphatase…

A: Smooth muscles relax when myosin phosphatase removes a phosphate group from myosin. (Option B is…

Q: Which of the following statements below will happen when a muscle is contracting? Point B will move…

A: The sarcomere is the structural component of muscle contraction. Myosin, a motor protein found in…

Q: What is the steps in the Sliding Filament theory of muscle cell contraction in correct order?…

A: Muscles play an important role in the movement, locomotion, contraction, digestion, etc. Muscles are…

Q: Explain in detail: What does the ‘sliding filament model of muscle contraction’ discuss or explain?…

A: Sliding filament theory of muscle contraction was given by Huxley.  The theory states that two…

Q: According to the size principle, which type of muscle fibers are recruited last during a muscle…

A: Size principle or Henneman's size principle was given by Elwood Henneman which demonstrates the…

Q: What does constant stimulation of a muscle fiber cause? O Decreased tension Constant tension…

A: The impulse from a connected neuron stimulates the muscle cells. Muscles are contractile tissue that…

Q: Muscle cells are stimulated by neurotransmitters released from the synaptic terminals of what…

A: ACTION POTENTIAL An action potential occurs when the membrane potential of a specific cell  rapidly…

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.