Match each description to the correct phase of a muscle twitch 73. Sección Ca2+ transported back into the sarcoplasmic reticulum 74. Sarcomeres shorten 75. Depolarization occurs in the T-Tubule 76. Muscle Tension decreases A. Latent period B. Contraction phase

Q: Which of the following statements accurately describes the pattern of recruitment in a muscle when…

A: The contraction of muscle is responsible for the development of muscle movement. The generation of…

Q: Delayed onset muscle soreness (DOMS) is most closely associated with which type of muscle actio a.…

A: It is experienced by many and characterized by pain and stiffness in muscle.

Q: Which of the following describes the addition of muscle fibers to take part in a contraction? a.…

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

Q: 3) Paula is a scientist who is developing a drug called Fremtol that will be used to treat muscle…

A: ATP works as a cell energy currency and it helps the cell to rapidly accumulate energy and transfer…

Q: Hill's equation gives a relation between muscle contraction rates νν and muscle tension TT…

A: We have to rewrite the equation in a form to show that T is dependent on v including T0, alpha and…

Q: Striated muscle twitch force reaches a maximum after nearly all of the calcium is pumped out of the…

A: The correct answer is:D.) Calcium is the initial switch to turn the actin thin filament on and then…

Q: e following are reg itch? (choose all that apply) e first phase where the "cross-bridge" c

A: The contraction of a muscle fiber in response to a stimulus by the nervous system is called as a…

Q: What structure in skeletal muscle cells functions in calcium storage?   a.myofibrillar network…

A: Skeletal system is one of the important organ systems of the body. It provides a structural and…

Q: Which of these events occurs during the lag (latent) phase of musclecontraction?a. cross-bridge…

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of myosin and…

Q: Indicate if the statements are TRUE or FALSE. ________ 11. Actin is found only in the striated…

A: A muscle fiber is produced when numerous muscle cells fuses during the course of development. There…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: Which of the following statements about the microscopic structure of smooth muscle fibers is…

A: Muscles have a vital role in the body. Muscles do a lot for our bodies as well. They circulate blood…

Q: The release of which of the following minerals from muscle cell storage sites stimulates muscle…

A: Sarcoma muscles store calcium in sarcoplasmic reticulum. It gets released when a muscle cell or…

Q: What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?…

A: Muscle contraction is the activation and formation of tension sites with muscle fibres, while muscle…

Q: Select ALL that would INCREASE the strength of a muscle contraction: recruiting more slow-twitch…

A: Skeletal muscle cells are long and cylindrical, has voluntary control in action that is in under our…

Q: The plasma membrane of a skeletal muscle fiber is called thea. sarcoplasmic reticulum.b.…

A: Skeletal muscles are involved in movement. Contraction of skeletal muscles makes movement possible.…

Q: In a skeletal muscle fiber, Ca2+ is released from a. ACh receptors. b. the motor end plate. c. the…

A: Skeletal muscle mainly attaches to the skeletal system via tendons to maintain posture and control…

Q: When muscle fibers are stimulated so frequently they do not have an opportunity to relax, they are…

A: There are two types of skeletal muscle fibers, fast-twitch and slow-twitch, and they each have…

Q: Which of the following does NOT contribute to muscle fatigue? A. K+ accumulation B. ADP and…

A: Introduction Muscle fatigue is a condition in which muscles loses the ability to perform overtime.…

Q: A muscle has a limit to how much it can contract, based on the limit of contraction of each…

A: The study of the human body can be divided into anatomy and physiology. The anatomy studies about…

Q: Which of the following is the site of calcium ion storage within muscles? a. T tubules b.…

A: Muscles are the body tissues that are principally accountable for causing movement in the body.…

Q: The series-elastic component of muscle contraction is responsible for a.increased muscle shortening…

A: Muscle is a delicate tissue found in many creatures, and is one of the four fundamental creature…

Q: Order the following steps of muscle contraction: Drag and drop options into correct order and…

A: The action potential is initiated and propagated through the motor neurons to finally reach the…

Q: During muscle contraction, the I band a. hides the H zone. b. shortens or narrows. c. overlaps the Z…

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

Q: Arrange the steps of muscle innervation and contraction in response to touching a hot plate.…

A: Sensory neurons(afferent neurons) are defined as the type of nerve cells where they get activated…

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: Put the following in order to accurately follow the sequence of events associated with muscle fiber…

A: Relaxing of muscle filaments starts with the motor neuron, which stop delivering its compound sign,…

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

A: The term excitation-contraction coupling (ECC), first coined by Alecxander sandow in 1952, describes…

Q: The actual contractile units of muscle, called _____, extend from middle of one _____ to middle of…

A: Muscles are referred to as the soft tissue of the body, contraction, and relaxation of the muscle is…

Q: Muscle contractions where the muscle shortens but tension remains constant are called A. isometric…

A: Muscular system is a type of body system in which regular contraction as well as relaxation leads to…

Q: During muscle contraction, binding sites for myosin are uncovered by the movement of A. Tropomysin…

A: A. Tropomyosin   During muscle contraction, the binding sites for myosin on the actin filament are…

Q: Explain the requirements for Ca2+ and ATP in muscle contraction and relaxation.  Remember that…

A: A sarcomere is the basic contractile unit of muscle fiber. it has two protein filaments  1. actin 2.…

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: 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: Describe and explain the sliding filament model of contraction. Be sure to include in your response…

A: The fundamental contractile unit of muscle fiber is called a sarcomere. Actin and myosin, the two…

Q: he factor(s) that determine the duration of a twitch in various types of fibers is the speed of the…

A: Muscle contraction is a complex biological process that involves the interaction of various…

Q: What causes relaxation in a skeletal muscle fiber Select one: a. Myosin remains attached to actin b.…

A: Each skeletal muscle is an organ that consists of various integrated tissues. These tissues include…

Q: Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple…

A: Skeletal muscle is found tethered to bones. It has fibers with many nuclei. Skeletal muscles are…

Q: C 5. State the structure and function of each of the following parts of a muscle fiber. (See pg. 13…

A: All the muscles in the body are contractile and mesodermal in origin. Muscles are classified into…