Explain how your musculoskeletal system uses this mechanism to generate force. What is represented by (1) and (2) in the third figure? In comparison to the other mechanisms available to generate force (by muscles), how effective is this mechanism for controlling the generation of force?

Q: Briefly explain how does cross-bridge formation affect muscle force.

A: During muscle contraction, a force is generated in the muscle. This is termed the muscle force. This…

Q: Assuming that the mass (weight) of these three different muscles is the same, WHICH most power, for…

A: Understanding Muscle powerA vital component of human biomechanics, Muscular power generation is…

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: ney: Load (L) = 5 kgs E = Effort F = Fulcrum Weight of forearm = 1.8 kgs L- Load Biceps brachi…

A: Muscle is utilized to support joints and keep them protected from collapsing under stress. Smooth…

Q: Why do some muscles have larger EMGs than other? Explain what’s happening at the cellular level.

A: Ans. Muscles are contractile tissues in the body that enable movement by contracting and relaxing.…

Q: Which of the following muscle cell components helps spread the depolarization of the muscle cell…

A: The objective of the question is to identify the muscle cell component that is responsible for…

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: 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: 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: Describe the three pathways by which muscles can produce theATP they need to contract.

A: Man needs the energy to do work, that energy is not directly obtained from the food he/she consumes.…

Q: 83% of the total number of fibers examined in the vastus lateralis and nearly 61% of the…

A: Fast-twitch muscles fibers : These muscles are specialized for powerful forces but can be employed…

Q: identify the incorrect statement about skeletal muscle  (A) the epimysium, perimysium, and…

A: Concentric isotonic contractions - contractions that involve shortening of the muscle are referred…

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: Explain why some domesticated birds, like turkeys andchickens, have mostly fast-twitch fibers in…

A: A muscle fiber is a bundle of cylindrical shaped structure found in the muscle. Their primary…

Q: In making maximal-effort arm movements (e.g., throwing, striking, projecting an object as far and…

A: Muscles are the structural and functional entities of the muscular system of the body. Muscles work…

Q: In most fish, the bulk of the trunk muscles are fast glycolytic, which are not used for steady…

A: Introduction :- The metabolic mechanism that transforms glucose to pyruvic acid is known as…

Q: If the muscle fiber is stretched to 150% of muscle length and thentechnically stimulated, what would…

A: Muscle contraction is shorting of length of muscle which  lead to locomotion and movement. Most…

Q: What is the main active muscle group across the (i) right knee joint and (ii) right ankle joint…

A: INTRODUCTION Muscles are group of muscle fiber they can contract and relax and they produce force.…

Q: Describe in details the biochemical and mechanochemical series of events that enables motor neurons…

A: Muscle contraction means activation of tension-generating sites within our muscle cells and the…

Q: explain why the I band and H zoneshorten during muscle contraction, while the length of theA band…

A: Muscles are one of the four primary body tissues which are primarily responsible for the movement in…

Q: Individual motor units can vary based on which of the following? (SELECT ALL THAT APPLY) a.) The…

A: Motor units It consists of a motor neuron and every skeletal muscle fiber that the neuron's axon…

Q: How can the body regulate how much force the muscle should generate?

A: The force  a  muscle generates is dependent on the length of the muscle and its shortening velocity.…

Q: Epimysium Myosin Myofibril Muscle fiber Tendon D www Dece

A: 1)  Epimysium :Definition and Composition:Epimysium is the outermost layer of connective tissue…

Q: Chickens are capable of only brief bursts of flight, and their flying muscles consist of fast…

A: Introduction: Wings of birds are responsible for giving them flight. They possess feathers and the…

Q: and placed in a solution of sodium chloride, potassium chloride, and sodium bicarbonate, will muscle…

A: Muscles contract and relax and thus produce motion. There stimulation needs action potential to be…

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: What would happen without input from gamma motor neurons? A) Information about velocity would…

A: Intrafusal fibers are specialized muscle fibers. They are found in the muscle spindles. Muscle…

Q: Tessa and her laboratory partners were given the followingassignment: Explain how the structure of…

A: The muscular system is regarded as one of the vital systems of the body involved in the locomotion…

Q: What are the differences in the cellular and molecular levels in a bodybuilder arms muscles compared…

A: There is a lot of difference between the muscles of a bodybuilder compared to those of a weaker,…

Q: If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from…

A: Introduction  The biceps muscle is located in the front of the upper arm. The biceps consists of a…

Q: Match the following types of contractions:

A: Skeletal muscles are one of the three major categories of muscle (the other two being the cardiac…

Q: Muscles need energy to function properly. Identify a minimum of two pathways generating ATP during…

A: Muscle contraction is a complex process. It occurs when the thin actin and thick myosin filaments…

Q: Define the kinetic properties of the flight muscle ?

A: A wing (flight) muscle is among the muscles that is employed in flying. Classification  Direct…

Q: Explain how muscle velocity changes with varying muscle force (tension) during the different types…

A: The process in which the fascicles i.e. the muscle fibers become short and enlarges to produce…

Q: Explain why myosin II in a sarcomere can produced force only for that sarcomere contraction and not…

A: SARCOMERE   It is the basic structural and functional unit of muscle tissue. COMPONENTS: Each…

Q: Describe in your own words the events that occur duringskeletal muscle contraction.

A: The musculoskeletal system is made up of the body's bones (the skeleton), muscles, cartilage,…

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.