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: During the contraction of a vertebrate skeletal muscle fiber,calcium ions(A) break cross-bridges as…

A: Skeletal muscles are voluntary muscles. It attached to bone by tendons. It helps in movement of…

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: f a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative…

A: T tubules or the transverse tubules are the extensions of the cell membrane that penetrate into the…

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: Botox  has become popular for reducing wrinkles.  It is a dilute solution of a toxin which inhibits…

A: Botox injections block specific chemical signals from nerves, for the most part signals prompt…

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: What type of cells sit outside the sarcolemma of a muscle fiber but below the basement membrane of…

A: Sarcolemma The plasma membrane of the muscle cell is called sarcoplasm and it is surrounded by he…

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: 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: 31) which of the following are included in a triad found in skeletal muscle? a) actin, myosin and…

A: Skeletal muscle is one of the three types of muscles found in the muscular system. The other two…

Q: The figure seen here represents which type of muscle fiber? a.) Type IIx- very fast, fatigable b.)…

A: The muscle fibers are multi-nucleated (exclusively in the case of skeletal muscle fibers),…

Q: 9. Which of the following correctly describes the end plate potential (EPP)? A)It is primarily…

A: End plate potentials (EPPs) are the voltages which cause depolarization of the muscle fibers caused…

Q: 18) Which of the following is NOT correct statement regarding muscle fatigue? A) Gradual increase in…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

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: Describe how each of the following factors influences motor unit recruitment: a) Increasing…

A: Alpha motor neurons (also called inferior motor neurons) don't have striated muscle and cause…

Q: Discuss the following statement: “The basal lam-ina of muscle fibers serves as a molecular bulletin…

A: Muscle fibres are the contractile cells which are present in the muscles. These are responsible for…

Q: A muscle fiber is the same thing as a: a) myofibril. b) myocyte. c) myofilament. d) fascicle.

A: MUSCULAR TISSUE:- These tissues are different from other tissues as they have the ability to…

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: Fast twitch muscle fibers are characterized by all of the following EXCEPT: O a) fatigue resistant…

A: Fast twitch muscle fiber contracts quickly especially during high-intensity physical activity or…

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: Cardiac and skeletal muscle are both “striated” types of muscle and yet they have very distinct…

A: The skeletal muscles are a part of muscle tissue in the body. They are attached to the bones by the…

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: 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 fibres are very metabolically active and are adapted to create a lot of ATP from…

A: The purpose of this answer is to explore how the three different organ systems (respiratory,…

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: The following events happens in neuromuscular junction, putthese events in the correct temporal…

A: In skeletal muscles, cells' contraction occurs after the release of calcium ions by the neural…

Q: what role does calcium play in muscle contraction? a) calcium is not involved in skeletal muscle…

A: The musculoskeletal system of the human body provides a frame and shape to the human body. This…

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: Acetylcholinesterase is an important molecule in the engine end plate to share: a) stimulates…

A: Introduction:  Acetylcholinesterase is primary cholinesterase in body. It is also known as AChE or…

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: In skeletal muscle, the sarcolemma is directly covered by: a) epimysium. b) perimysium. c)…

A: Muscles:              In animals, soft tissues found known as muscles. Muscles cells contain myosin…

Q: Pick the right order for muscle contraction a) ATP attaches to myosin, muscle cell uses calcium,…

A: Within the muscle cell the actin and myosin interaction occurs. The acting is a cytoskeleton protein…

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: when a skeletal muscle contracts, it usually moves the bone at one end much more than the bone at…

A: Muscle is a type of tissue that is found in the body and has the ability to contract. Muscles are…

Q: Describe the position where wrist and finger are in full extension.  What sensation will be felt in…

A: Muscles are constantly contracting and relaxing to allow for movement. The type of contraction a…

Q: 11. The period of time (a few milliseconds) between the stimulation of a muscle fiber and the onset-…

A: Due to our answering policy, we can only answer one question at a time. Therefore, please repost the…

Q: Which part of a skeletal muscle does shorten during muscular contraction? A) Thick filaments B) Thin…

A: Skeletal muscles are throughout the body and considered an organ of the muscular system. They vary…

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.