18. The binding of calcium to troponin will directly cause A. the hydrolysis of ATP B. the binding of ATP to myosin C. the further release of calcium into the cytoplasm D. the movement of tropomyosin, thereby exposing the myosin-binding site on the actin molecule E. the movement of tropomyosin, thereby exposing the actin-binding site on the myosin molecule F. release of neurotransmitters from the axon terminals G. Both B and F

Q: 19. The function of transverse (T) tubules A. They store calcium B. They provide elasticity to the…

A: There are different type of muscles like   Cardiac muscle: The cardiac muscle is a striated muscle…

Q: Muscle relaxation occurs when ________. a. calcium ions are actively transported out of the…

A: The human body is a well built machine in which all the organs coordinate together to make it work.…

Q: The dark A band of a sarcomere contains regions where the actin and myosin filaments overlap.  True…

A: The sarcomere is the basic unit of muscle fibers that is responsible for the contractile function.…

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: The binding of calcium to troponin will directly cause A. the hydrolysis of ATP B. the binding of…

A: Actin-binding proteins and calcium ions play an important role in muscle contraction and relaxation.

Q: A typical relaxed sarcomere is about 2.3 μm in length and contracts to about2 μm in length. Within…

A: The muscles fibers are composed of myofibrils and in turn myofibrils are composed of myosin and…

Q: 38. Which of the following (are) is true when 50% of the motor units are stimulated?   A. the…

A: A motor unit is composed of a Motor neuron and the skeletal muscle fibers supplied (innervated) by…

Q: 1. A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. II.…

A: The spinal cord is the place where motor neurons are located. It is the site of interneurons and…

Q: 30- Which of the following is true about muscle contraction: a- Results by the actin sliding along…

A: Muscle contraction us the tightening , shortening or lengthening of muscles when you do some…

Q: 2. Which of these activities is not related to the muscular system? A. The secretion of hormones…

A: Since there are multiple questions in this particular question, I will answer the first one for you.…

Q: a Outline the steps involve in the investigation of suspected Acromegaly or Gigantism. b. Different…

A: Thyroid gland is the gland which is situated in the neck and is an endocrine gland. This two-lobed…

Q: 33. Which of the following sentences is NOT correct? A. Cancellous bone (trabecular) is spongy bone…

A: A bone forms a part of the vertebrate skeleton in animals. They protect the various organs of the…

Q: The binding of calciun to troponin will directly cause A. the hydrolysis of ATP B. the binding of…

A: Muscle contraction and relaxation is a very important process for the movement of the muscles, with…

Q: Stimulation of a muscle fiber by a motor neuron occurs ata. the neuromuscular junction.b. the…

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

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: 29- Which of the following binds to Ca to trigger muscle contraction: A. Tropomyosin B. Troponin C.…

A: Skeletal muscles are usually attached to bones and tendons composed of connective tissue . Thin…

Q: 34- Which of the following sentences is incorrect: a- Muscle fibers and neurons are similar because…

A: there needs a correction in question part. it is saltatory conduction.

Q: The function of ATP during muscle contraction is toa. cause an allosteric change in myosin so it…

A: ATP(adenosine triphosphate) causes an allosteric change on myosin so it detaches from actin and…

Q: In muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules.…

A: Calcium triggers contraction by reaction with regulatory proteins that in the absence of calcium…

Q: How would a myosin head mutant unable to bind ATP likely influence the myosin Il cycle? The myosin…

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

Q: Which of the following is false regarding smooth muscle? A. It contracts slower than skeletal…

A: There are three types of muscles skeletal, cardiac and smooth muscles.

Q: if, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a…

A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…

Q: Once the calcium binds, what happens next? The myosin binding sites become available so myosin binds…

A: Muscles contract" in a sequence of binding and delivering amid the sarcomere's two thick and thin…

Q: 17. Which of the following choices is CORRECT? A. Myofibrils extend the length of a muscle fibre B.…

A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…

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

A: Answer is option e.

Q: According to the sliding filament theory: a. The tension increases linearly as actin-myosin overlap…

A: Introduction : The sliding filament theory states that the myosin filaments which are thick…

Q: 9. The binding of the myosin head to the free binding site of the actin filament results in the…

A: Introduction  Actin and myosin, coupled with the regulatory proteins known as troponin, tropomyosin,…

Q: Provide one difference and one similarity in the process of contraction of smooth, skeletal, and…

A: Muscles are divided into three categories: cardiac, smooth, and skeletal. Cardiac muscle is found in…

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

A: In muscle fibers, sarcomeres are the basic contractile units. There are two main protein filaments…

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: 17. Which of the following choices is CORRECT? A. Myofibrils extend the length of a muscle fibre B.…

A: Muscle is a soft tissue that helps in movement of the body, maintains posture, and circulates blood…

Q: The purpose of transverse tubules is to Select one: a. ensure a supply of glycogen throughout the…

A: Transverse tubules are basically the structures present in the muscles,they are the invaginations or…

Q: 5. Diagram the structure and organization of the actin and myosin filaments including the myosin…

A: Note-  As we are allowed to do only one question at a time so I will provide answer to one question…

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: a. Ca2+ does not affect muscle force. b. The muscle cell eventually habituates to the level of Ca2+…

A: Structure of muscle cell A muscle cell consists of hundreds of fibers. A single fiber consists of…

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: A bacterial toxin is known to block the release of ACh at the motor end plate of skeletal muscle.…

A: (c) the ability to stimulate the muscle is impaired

Q: 51- are links between the Filamentous F-actin of thin filaments and myosin heads of thick filaments.…

A: Introduction Muscle contraction is the activation of tension-generating sites within muscle cells,…

Q: You wish to use the polymer ultra-high-molecular- weight polyethylene (UHMWPE) as a scaffold to make…

A: Scaffolds are considered to be the most effective solution for the several challenges imposed in the…

Q: Match the ATP duty of myosin to its description…

A: Introduction  ATP Is Essential For Muscle Contractions Because It Frees The Myosin For The Next…

Q: What are the steps of the sliding filament model? Select all that apply. Sarcomeres are in a relaxed…

A: Following are the steps of contraction of the disease 1. Release of neurotransmitter at motor…

Q: 5. What would happen if tropomyosin couldn't change confirmation in the presence of Ca2+ binding to…

A: When the muscle cell is stimulated to contract by an action potential, calcium channels open in the…

Q: Which statement about this diagram is NOT correct? A. Each pink sphere is an actin protein molecule…

A: Actin and myosin are two major proteins of which muscles are built up. These are mostly found in…

Q: In the presence of myosin cross-bridges are able to bind to complementary sites on the actin…

A: Every skeletal muscle is composed of my 5 deals full stop this my fibrils are composed of my…

Q: 1. actin 2. myosin shafts 3. myosin heads V D 4. thin filament - VE 5. thick filament - V F 6.…

A: A  -  3. Myosin head B  -  4. thin filament C  -  2. Myosin shafts D  -  1. Actin

Q: The thick filament is composed almost entirely of _____ molecules. (This is a multiple choice…

A: Each organized skeletal muscle in our body is made up of a number of muscle bundles or fascicles ,…

Q: Explain what how the muscle cell maintains resting membrane potential and explain the two main parts…

A: According to our guidelines we are allowed to answer single question at a time. So if you want to…

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.