1. During muscle contraction, hydrolysis of ATP results in a change in the conformation of actin a change in the conformation of myosin association of myosin head to actin D) dissociation of myosin from actin E) no effect on muscle contraction A) B)

Q: 23) which of the following is true about skeletal muscle?  a) they depend entirely on anaerobic…

A: Skeletal muscles are made of long, cylindrical thin cells that contain highly organised proteins and…

Q: A typical relaxed sarcomere is about 2.3 um in length and contracts to about 2 um in length. Within…

A: a) To find: The overlap of thick and thin filaments in the relaxed and contracted sarcomere

Q: 34. in an experimental study of skeletal muscle function, an isolated muscle strip is electrically…

A: Muscle tension Muscle tension interchangeably called "muscle force" is the amount of force produced…

Q: A weightlifter tries to lift a weight off the floor, but cannot upset it. Is the contraction: a)…

A: Muscles of the body help in the movement of the body of several types. there are different types of…

Q: Identify the organelle most likely responsible for each cellular job within skeletal muscle  a)…

A: Skeletal muscles are those which are connected with the skeleton and are voluntary in nature. These…

Q: Which of the following muscle cell components helps spread the depolarization of the muscle cell…

A: The objective of the question is to identify the muscle cell component that is responsible for…

Q: What part of the sarcolemma contains acetylcholine receptors? A) motor end plate B) any part of the…

A: Skeletal muscles are muscles which are under voluntary control. They are also known as striated…

Q: 1. Which myosin type II property is most different from kinesin-1? A) myosin has two heads that can…

A: The actin-myosin interaction is most commonly known for its role in sliding filament theory, where…

Q: 3) Smooth muscle contraction is regulated by: a) activation (excitation) of myosin. b)…

A: Muscles are of three types: Skeletal muscle  Smooth muscle  Cardiac muscle  Smooth muscle is an…

Q: 13) skeletal muscle fibers contract because thick filaments slide over and between thin filaments…

A: Muscles are an important aspect of our bodies because they protect us and aid in movement. Because…

Q: Total force in the length:force relationship is the result of a.) ideal overlap between the myosin…

A: The length-tension relationship in muscle tissue describes the force a muscle can generate at…

Q: Which of the following does NOT happen when your muscles are fatigued? A) Lactic acid buildup causes…

A: The inability of a muscle to maintain force of contraction after prolonged activity is called muscle…

Q: What happens to sarcomeres when actin and myosin filaments in a muscle fiber interact during the…

A: Answer - According to the question option B is correct which says : -  sarcomeres usually get…

Q: ach

A: B. ACH or Acetylcholine is the only neurotransmitter that is present in the somatic muscular…

Q: a) At what time point would a muscle begin to fatigue? Comment on the percentage decrease in…

A: Muscle fatigue can be explained as transient reduction in the force and the temporary inability to…

Q: What happened to the number of fibers contracting as you increased the voltage? b) In light of the…

A: In physiology if a isolated muscle fibre /motor neuron is stimulated, it will consistently offers a…

Q: 1. Which of the following is a possible way to distinguish between muscle types? A) Skeletal muscle…

A: Muscle tissues are densely packed with cells and are well-vascularized; they are responsible for the…

Q: 28) the large protein that attaches to myosin and stabilizes it when the sarcomere shortens is: a)…

A: The mechanism muscles contraction is explained by the sliding filament theory . In this myosin (a…

Q: property of muscle? a) cells are non- elastic b) cells are excitable

A: One of the four primary types of tissue is formed by the muscle. The three types of muscle tissue…

Q: In 2013, Zach Bitter set a new record for running a 100 mile Ultra-Marathon in less than 12 hours.…

A: The muscle fiber is an individual muscle cell that consists of hundreds or thousands of myofibrils.…

Q: The size of a motor unit (i.e., the # of muscle fibers innervated) can directly influence which of…

A: Motor unit This unit constitutes a motor neuron and all of the skeletal muscle fibers innervated by…

Q: In order to excite a skeletal muscle, the neurotransmitter must bind to: a)calcium channels. b)…

A: Neurotransmitters such as acetylcholine bind to receptors on the muscle surface and elicit a…

Q: An athlete is aiming to optimize their protein intake for muscle repair and growth. Which of the…

A: Optimizing dietary protein intake is an important consideration for athletes aiming to enhance…

Q: When an action potential runs down the surface of the sarcolemma, the muscle doesn't immediately…

A: Muscles  play an important part in locomotion and movement. They are derived from mesodermal layer…

Q: list that has the order from the smallest to the larges a) Sarcomere , Myofibrilactin , myosin b)…

A: Correct option: b) Actin, -sarcomere, -Myofibril, -Muscle Fibre

Q: Please fill in the blanks: 21) the binding of ______________ to troponin removes troponin from…

A: Introduction :- Troponin is a complex of three regulatory proteins (troponin C, troponin I, and…

Q: Individual motor units can vary based on which of the following? (SELECT ALL THAT APPLY) a.) The…

A: Motor units It consists of a motor neuron and every skeletal muscle fiber that the neuron's axon…

Q: 1) Which of the following components of skeletal muscle tissue is absent from smooth muscle tissue?…

A: Smooth muscle is a type of muscle tissue that is used by various systems to apply pressure to…

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 sample of muscle obtained from an experimental animal is bathed in a solution containing elements…

A: The human body is made up of 4 types of essential/fundamental tissue- Nervous tissue, epithelial…

Q: During the cross-bridge in muscle cells, myosin motors hydrolyzes ATP as a fuel to create a pulling…

A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…

Q: What type of muscle fibers would you expect to find in the leg muscles of a well-trained marathon…

A: Correct answers : d) Fibers with many mitochondria   It is the correct answer because a well…

Q: Skeletal muscle contraction is influenced by A) frequency of stimulation B) calcium release from the…

A: The muscular system allows body movements and maintains body posture. It includes skeletal, smooth,…

Q: What would happen without input from gamma motor neurons? A) Information about velocity would…

A: Intrafusal fibers are specialized muscle fibers. They are found in the muscle spindles. Muscle…

Q: Give typed explanation  Put the events of a single cross-bridge cycle in the proper order. Start…

A: Cross-bridge cycle explains the calcium-based interaction of actin filament and myosin during…

Q: 2 a) What does calcium do in a skeletal muscle cell and where in the cell does it come from?…

A: Skeletal muscle contraction is a complex phenomenon and involves various processes requiring special…

Q: Which is true for striated muscles? a) may have spontaneous activity b) is not under the control…

A: Muscle are group of cells which perfom a specific function. They are responsible for movement. They…

Q: Why is myosin II the only myosin capable of producing contractile force?

A: Introduction Myosins are a group of motor proteins that play a key role in muscle contraction and a…

Q: When a muscle fiber is stimulated with repeated stimuli, the contraction force is summed due to: a)…

A: INTRODUCTION Summation is that the . occurrence of additional twitch contractions before the…

Q: Which of the following statements is true about the control of muscle glycogen phosphorylase? a) It…

A: Introduction: Glycogen phosphorylase is a key enzyme that takes part in the first step of…

Q: 48. During muscle contraction, actin-myosin complex is formed and produces a conformational change…

A: Introduction  Muscle contraction occurs when tension-generating regions within muscle cells are…

Q: f you completely stopped working out for 6 months, the following would occur:

A: Muscle Fibres: The Tiny Titans of MovementMuscle fibres are the workhorses of your muscles,…

Q: hich of the following labeled zones in the electron -E (OC) OB) OA) 00) D E) -C -8

A: Muscles are the structures that are attached to the body's skeleton and are composed of cells that…

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.