Question 1 In a NMJ, what happens to the sarcolemma when acetylcholine is released into the synpatic cleft? allow influx of sodium ions and trigger action potential in muscle fiber n allow influx of calcium ions and trigger action potential in muscle fiber allow influx of calcium ions and trigger release of another neurotransmitter into the sarcoplasm allow influx of sodium ions and trigger release of another neurotransmitter into the sarcoplasm

Q: true or false 6. Muscle cells are mesenchymal in origin. 7. Myomesin binds to titin molecules and…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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: When an individual sarcomere undergo contraction, which of the following happens? H band and I band…

A: A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main…

Q: Looking at this diagram explain the order of size dependent recruitment of motor units during muscle…

A: Car rental refers to the performance of additional vehicles to achieve increased contraction…

Q: Question 3 During muscle contraction, the agonist while the antagonist 1. Shortens; lengthens 2.…

A: Muscles that produce movements work in groups during contraction. Therefore, classification of the…

Q: Both skeletal and (contractile) heart muscle cells A Have unstable resting membrane potentials B…

A: The skeletal muscles are the class muscles that are attached to the bones and are responsible for…

Q: Question 1 of 16 Which statement is NOT true regarding cross bridges? Select the correct response:…

A: The mechanism of contraction of skeleton muscles was best explained through sliding filament theory…

Q: Considering these events, what is the right sequence in muscle contraction? i. Ca2+ released from…

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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: Muscles with pacemakers are unique in that they have __.     motor neurons in the brain and spinal…

A: Muscles need innervation to work—and even to keep up muscle tone, staying away from atrophy. In the…

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: Question 16 Which type of neuron activates striated muscle fibers to cause muscle contraction? Upper…

A: The correct answer  to the given question is Alpha motor neurons.The final shared pathway for motor…

Q: con 19 What do all types of muscle tissue have in common? O interactions between actin and myosin a…

A: Muscle tissue is made up of cells with the unique capacity to shorten or contract in order to move…

Q: List five proteins of the myofilaments

A: Myofilaments The functional unit of muscles are the myofibril . It contains the contractile  unit…

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: Your unfortunate friend Greta has a condition where her Ca2+-ATPase works too fast. She comes to…

A: Calcium ions (Ca2+) play a crucial role in muscle contraction. They are stored in the sarcoplasmic…

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: QUESTION 17 What type of muscle would we find as the predominant muscle type in marathon runners?…

A: The objective of the question is to identify the predominant muscle type in marathon runners.

Q: D Question 38 1 pts You take a human smooth muscle cell and block the release of calcium from the…

A: Q 38.) :- ans.In smooth muscle cells, contraction is triggered by the presence of calcium ions…

Q: atent phase V [ Choose ] Active return of Ca2+ into SR Ca2+ released from SR Power stroke of…

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Q: 90% of the ATP used in skeletal muscle contraction is due to myosin-actin catalyzed ATP hydrolysis…

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Q: Question 2 of 16 The relatively light portion of the A band of skeletal muscle Select the correct…

A: Skeletal muscle- Skeletal muscle forms about 40-50% of body mass and is responsible for movement and…

Q: Which muscle filament in skeletal muscle contains the calcium-binding protein? O Thick O Sarcomere O…

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Q: QUESTION 20 A plank would be an example of what type of exercise? OA Isotonic muscle contraction OB.…

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Q: Question 6 of 16 Which of the following is mismatched with its function in muscle contraction?…

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Q: What is the correct order that a motor nerve stimulation encounters structures in triggering a…

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

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Q: 13 QUESTION 13 Which of the following is a characteristic of Slow-twitch (Oxidative) muscles? O A.…

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Q: Question 4 of 16 The physiologic event that takes place at the sarcolemma of a skeletal muscle cell…

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Q: Which of the following is NOT TRUE of the neuromuscular junction? O presynaptic calcium influx…

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

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Q: Increased blood volume in the heart increases the force of contraction The most common way of…

A: No, that statement is not correct. Increased blood volume in the heart does not directly increase…

Q: Put the following events of excitation-contraction coupling in the order in which they occur. 1.…

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Q: Tropmyosin and Troponin are called the regulatory proteins in muscle contraction. Describe the…

A: Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils…

Q: which type of muscle fibers is ATP synthesized aerobically in mitochondria?…

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Q: QUESTION 15 What section of a sarcomere does not shorten during muscle contraction? Al Al Z disk…

A: INTRODUCTION Sarcomere It is a part of a striated muscle, which is a functional unit and works in…

Q: Which of these is an example of isotonic muscle contraction? O Swinging a bar O Swimming Running a…

A: Basically in an isotonic muscle contraction, tension remains the same throughout the muscle while…

Q: QUESTION 9 Which of the following is true about skeletal, smooth and cardiac muscle? OA. They are…

A: The question is asking us to identify the common characteristic among skeletal, smooth, and cardiac…

Q: QUESTION 8 How does the nervous system grade the force of muscle contraction? O a. Only by…

A: Introduction: The nervous system is primarily responsible for information transmission via…

Q: Question one: Which of the following is TRUE concerning motor units?

A: Muscles are involved in movement and locomotion. Muscles originate from the mesoderm.  Agglutination…

Q: During which step of a muscle contraction cycle is ATP needed? when myosin head does a power stroke…

A: Muscle contraction occurs when tension is generated in the muscle fibers. It occurs due to the…

Q: Need help with both please #3 and #7

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Q: Each of the following statements is a particular step involved in the sliding filament theory of…

A: Muscular movement of skeletal muscles occurs due to the contraction of muscles. Muscle is made up of…

Q: Draw the neuromuscular junction and skeletal muscle fiber & provide your reasoning why it's an…

A: Note: As per the guidelines, we are answering the first question here, Please repost the other part…

Q: In which type(s) of muscle cells does each cell have its own neuromuscular junction?…

A: As per the guidelines, first is answered. Cells called muscle fibres are composed of skeletal muscle…

Q: 4. As skeletal muscle shortens with contraction, the length of the I band remains constant as the…

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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.