Muscle contraction results from interactions between thin filaments, composed mainly of the protein________ , and thick filaments, composed mainly of the protein______. The “heads” of the thick filament protein grab on to the thin filament protein and flex. The energy of_______ is used to extend the head, which stores that energy to power the flexing movement of the head, pulling the thin filament past the thick filament.

Q: Contrast the role of Ca2+in the contraction of a skeletalmuscle fiber and a smooth muscle cell.

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

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: Why is muscle 1 more powerful than muscle 43

A: The shape of the force-velocity (F-V) relationship affects many aspects of muscle physiology,…

Q: What does the integrated curve (in BIOPAC) represents ?

A: BIOPAC  is a digital platform used for teaching student, specifically developed for secondary…

Q: Which is the order of glycolytic capacity between these muscle fiber types O I> lla > Ilx O Ix > la…

A: The contraction of the muscle fibre is explained by the muscle contraction theory by the 2 muscle…

Q: Name the system that provides a ready supply of phosphocreatine to muscle cells and describe where…

A: Phosphocreatine It is also known as creatine phosphate. It is a phosphorylated form of creatine…

Q: In relaxed muscle, the myosin-binding site on adin is blocked by ?

A: Step 1 Contractile elements of muscle fibre are myofibrils. They are made up of contractile units…

Q: A skeletal muscle can often maintain a moderate level of active tension for long periods of time,…

A: A neuromuscular junction also called the myoneural junction is a chemical synapse between the motor…

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: During a single muscle twitch, the sarcomeres within a muscle contract maximally. How can you…

A: A contraction of muscle fibers generate when an action potential pass down the motor neurons. A…

Q: Motor neurons innervate muscle fibers at specialized synapses called_______ . The release of…

A: In “motor neurons”, the cell bodies are located in the spinal cord, motor cortex, or brainstem. The…

Q: At the level of the sarcomere, explain the sliding filament model for how muscle contracts

A: Muscle contraction and relaxation is one of the main reasons that aid the movement or locomotion of…

Q: Discuss about Ca2+-dependent thin-filament regulation of skel-etal muscle contraction.

A: Movement of skeletal muscle in mammalians show large variability in its functions with their…

Q: Explain how ATP and creatine phosphate function inskeletal muscle fiber contraction.

A: The process of contraction of muscle fiber occurs in a series of events, that initiates with the…

Q: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: Skeletal muscle will be released in its contracted (rigor) state when: Group of answer choices ATP…

A: Please note that the correct statement for the question should be "Skeletal muscle will be released…

Q: distance runners. All of tl igher concentration of gl

A: Elite sprinters make use of type II fibers more than other muscle fibers and are fast glycolytic…

Q: In your own words describe how acetylcholine ,calcium,and ATP are involved in the process of muscle…

A: Muscle contraction is a process where tension-generating sites in the muscles fibers are activated…

Q: What structures/s is/are responsible for the banding pattern in skeletal muscle cells? (EXPLAIN)…

A: Striated muscles are generally voluntary muscles that are under the conscious control of brain.…

Q: Please describe when the myosin heads grab and pull on the active sites in the actin fibers

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: describe the physiological properties that all muscletypes have in common;

A: Muscles are classified into various types based on their structures, locations, and ability.

Q: name the major proteins of a muscle fiber and state thefunction of each

A: Tendons attach skeletal muscles to the bone. Numerous bundles which make up the skeletal muscle are…

Q: Describe how the terms pennate, parallel, and circular relate to muscle fiber orientation?

A: The skeletal muscle fibers (muscle cells) are long and thin in shape. They are bundled together in a…

Q: Explain how the sliding filament model is responsible for muscle contraction.

A: Muscle contraction can be defined as the phenomenon in which shortening of the muscle occurs that…

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: Describe the sequence of events that occurs when an action potential arrives at a muscle fiber’s…

A: When the action potential arrives at the end of motor neurons, it excites the skeletal muscles to…

Q: We control muscle force using motor unit recruitment. When we recruit more motor units, what is…

A: The process of activating different motor units to achieve a specific level and kind of muscular…

Q: Thick myofilaments contain which of the following? (Select all that apply) troponin actin myosin…

A: Myofilaments are key regulators of the contraction in cardiac and skeletal muscles. The thick-thin…

Q: active muscle tension begins at approximately one hundred percent of resting length for a muscle…

A: Muscle tension is the condition where muscles of the body remain semi-contracted for a lengthy…

Q: The ________ opposes or resist, the action  caused by the prime mover Antagonist  Prime mover…

A: Muscles contract to produce movements and motion. Muscle always works in pair.

Q: The functions of tropomyosin in skeletal muscle include sliding on actin to produce shortening…

A: 1. acting as a relaxing protein at rest by covering up the sites where myosin binds to actin  2.…

Q: Provide the levels of biological organization in a muscle.

A: Muscles are a type of soft tissue that are responsible for movement and the maintenance of posture…

Q: In addition to glucose, brain cells also need the amino acid phenylalanine to move from the blood…

A: Introduction:- Phenylalanine is an essential amino acid that is used to produce proteins and…

Q: Describe how the sliding filament model explains thecontraction of muscle fibers.

A: The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in…

Q: Describe how glycolysis, creatine, and mitochondria are important to a skeletal muscles fiber's…

A: ATP provides the energy required for muscular contraction. In addition to its direct role in the…

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: Describe how thick and thin filaments interact during a musclecontraction

A: For a muscle to contract , the sarcomere must shorten . However , thick and thin filaments which are…

Q: Tropmyosin and Troponin are called the regulatory proteins in muscle contraction. Describe the…

A: Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils…

Q: Muscles typically shorten when they contract.  Explain the three ways by which they return to their…

A: Muscles are made up of fibers. There are over 600 muscles which comprises of muscular system. They…

Q: Describe the Neural excitation of the muscle and Describe how a signal arriving at the axon terminal…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: Muscle contraction What makes the thick filament? What makes the thin filament?

A: The muscles are the components of the body that enable locomotion. The nervous system regulates the…

Q: Which type of muscle fiber arrangement is most appropriate for the shoulder muscle that leads to…

A: Introduction: The muscle is a contractile tissue responsible for the movements of the body. Muscles…

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.