Which of the following regions of a sarcomere at rest is characterized by the presence of myosin only? a) A band b) H zone c) I band d) Z line

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: 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: Describe the structure of a sarcomere. What is its function?

A: Muscles are a group of tissues that contract together to produce a force. It consists of fibers 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: 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: 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: Explain Structure of myosin

A: Myosin is a protein that belongs to the class of molecular motor proteins. This class comprises two…

Q: What are the three functional types of proteins found in a myofibril?

A: A muscle fiber is made of many Myofibril and myofibrils are made of many myofilaments. Myofibrils…

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: Name, and describe the function of each of the contractile and structural protein components of a…

A: Sarcomere is the functional unit of the skeletal muscles comprising of alternate light and dark…

Q: A)Fill in the blanks below regarding sarcomeres: In a sarcomere, thin filaments are composed…

A: Sarcomere is the functional unit of striated muscle. Our skeletal muscle is made up of sacromeres .…

Q: There are no known motor proteins that move along intermediate filaments, in contrast to the variety…

A: The cytoskeleton does the mechanical support, motility and maintenance of the cellular structure in…

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: (a) What are myofibrils? (b) Which components of the sarcoplasm separate the myofibrils in a fiber…

A: The three muscle types in the human body are skeletal, smooth, and cardiac muscle. Skeletal muscles…

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: 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: a) Why are muscles not in a contracted state all the time? b) Several hours after the death of an…

A: Muscles These are defined as the soft tissues that are involved in the movement of the body and in…

Q: The formation of the most abundant collagen in the body involves the production of a number of…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: 18) in a sarcomere, which of the following is found in the light band? a) actin and myosin b) none…

A: The smallest functional unit in a striated muscle is a sarcomere. It is located between two Z-lines.…

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: The ability of myosin to walk along an actin filament may be observed with the aid of an…

A: Myosin is the motor protein, actin filaments are the tracks along which myosin moves, and ATP is the…

Q: Troponin binds to actin to cover the myosin binding site. a.) True b.) False

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: What do Intermediate filaments provide?

A: Intermediate filaments:                   The key function of intermediate filaments is to provide…

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: Describe the basic structure of a sarcomere.

A: Muscle fibres are made up of two protein filaments known as Myosin filaments which are thicker and…

Q: During an experiment, the protein troponin from a skeletal muscle fiber was removed. This resulted…

A: The muscle contraction involves interaction between actin (thin filament) and myosin (thick…

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: Are there any diseases linked to actin filaments? Are any mutations that could halt the growth of…

A: Actin filaments are long, thin protein fibers that are found in all eukaryotic cells. They are part…

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: Which of the following can respond to increased stimulation with a graded response: a) motoraxon…

A:

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: 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: 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: 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: You are attempting to crystallize the head group of a myosin-like muscle protein from a newly…

A: Papain and Trypsin are enzymes very commonly used in animal tissue culture experiments to digest…

Q: How is filament polarity detectable?

A: Microfilaments in the cell form structures associated with the plasma membrane.

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.