The mechanism of muscle contraction is best explained by the sliding filament model. According to this model, thin ___i___ filaments slide over thick ___ii___ filaments. The statement given above is completed by information in row   Row i ii A. myosin actin B. myosin myosin C. actin actin D. actin myosin

Q: Compare the composition of flight muscles with a powerful locomotive muscle in terms of…

A: Flight muscles are a type of muscle which is found in birds or insects. This muscle helps birds or…

Q: In tonic smooth muscle that contracts continuously for long periods, the highly efficient "latch…

A: Smooth muscles are unstriated and involuntary muscles. They are present in viscera such as GIT,…

Q: Select one or more: - a. No tension can be generated. b. Both contractile and elastic forces…

A: Stretching helps to keep our muscles flexible, strong, and healthy, and its very much needed for…

Q: Muscle contraction results from interactions between thin filaments, composed mainly of the…

A: Actin Myosin ATP

Q: The Sarcomere 2 Thin filaments are often named for which protein? a. actin b. myosin c. troponin d.…

A: The sarcomere is the smallest functional unit of a skeletal muscle fiber. It is a highly organized…

Q: A thick filament is made up of Select one: a. myosin and regulatory filaments b. actin and…

A: Muscular contraction is caused by the interaction between actin and myosin as they temporarily bind…

Q: Which region of the sarcomere does not change length between muscle relaxation and muscle…

A: Muscle is a kind of tissue as it is made up of group of cells. It is one of the four kind of primary…

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: The function of Ca2+ in skeletal muscle contraction is toa. cause an allosteric change in myosin so…

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

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: An unexpected discovery from studies of ameboid movement is that the same proteins found in the…

A: A crucial characteristic of animals is movement. Animal movement takes place in various forms in…

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: Considering the force of contraction of a skeletal muscle fiber,wave summation occurs because ofa.…

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

Q: Muscle contraction and cytokinesis both require motor proteins and microtubules. Select one: a.…

A: MOTOR PROTEINS AND MICROTUBULES IN MUSCLE CONTRACTION Skeletal muscle myosin, which produces the…

Q: Muscle fibers contractions differ with regard to tension and shortening. When a muscle Fiber begins…

A: Isometric and isoconcentric

Q: The decrease in active force that occurs at lengths longer than the optimal length is caused by: O…

A: According to the question, the decrease in active force that occurs at lengths longer than the…

Q: Describe the process of skeletal muscle contraction, beginning with an action potential in a motor…

A: Skeletal muscles are voluntarily controlled.

Q: The protein whose removal enables myosin to bind actin in smooth muscle is: (pick one from 1-5).…

A: Smooth muscle: Smooth muscle is present throughout the body, where it serves a variety of functions.…

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: When sarcomeres contract during muscle contraction, which of the following occurs?   A. The myosin…

A: Sarcomeres contract during muscle contraction.

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: During muscle contraction, some energy is supplied from creatine phosphate. Which of the following…

A: Muscle contraction occurs when tension-generating sites within muscle cells are activated.

Q: Fast oxidative glycolytic fibers in skeletal muscle are used Select one: O a. intermittently, for…

A: "Muscles" perform various functions as movement, which is the fundamental purpose of muscles is to…

Q: Part B Matching Choose the appropriate words or phrases from column "B" that match the terms in…

A: The muscle tissue is one of the tissues in the body that helps in movements. The muscle is of three…

Q: Which of the following is arranged in order from smallest tolargest?a. Motor unit < sarcomere…

A: When a nerve impulse travel to the muscle contraction that is an action potential causes the muscles…

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: According to the sliding filament model, when muscles contract,a. sarcomeres shorten.b. myosin heads…

A: Answer is option e.

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: You can choose one or more than one option   About human skeletal muscle contraction, what are the…

A: Actins are the functional unit of muscles. The movement of muscles and their actions are based on…

Q: Describe an aspect of skeletal muscle metabolism that is of interest to you, explain how it applies…

A: Skeletal muscle metabolism refers to the set of chemical processes and reactions that occur within…

Q: The repetitive contraction unit in muscle cells is called: Select one: O a. A Band O b. Fibril O c.…

A: There are types of muscle fibers: Skeletal muscle fibers, Smooth muscle fibers and cardiac muscle…

Q: What are the three muscle types shown in slide 2 (between cardiac, skeletal, and smooth)? Label A,…

A: The muscle is soft tissue and has a fibrous makeup. This tissue helps the body to maintain and aid…

Q: Match each description to the correct phase of a muscle twitch 73. Sección Ca2+ transported back…

A: Muscle contraction happens when the slender actin and thick myosin fibers slide past one another. It…

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: Which of the following statements about smooth muscle is correct: Select one: a. Endothelial…

A: Muscular tissue is an important specialized tissue that is present in animals and aid in the…

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.