explain how the shortening velocity can be varied from very fast to very slow even though the load on the muscle remains constant

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: Describe the relationship between the resting muscle length and the strength of its contraction.

A: Muscles are stretched even at rest i.e. when muscles are not contracting they are actually stretched…

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

A: Actin Myosin ATP

Q: (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to…

A: NOTE:- "As you have posted two parts under one, we will solve the first part for you, to get the…

Q: Discuss the specific role of ATP in muscle contraction.

A: ATP is Adenosine triphosphate which is also referred as the cellular energy currency.

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: Identify the major events that occur during skeletal musclefiber contraction.

A: The skeleton is composed of bones, cartilages, tendons, and ligaments. The body movement is…

Q: Explain why maximal aerobic power decreases at altitude and what effect this has on performance in…

A: Answer: Introduction: Maximal aerobic power decreases at altitude and what effect this has on…

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 the characteristics of these muscle fibers: slow twitch, fast twitch oxidative and fast…

A: Skeletal muscle fibers are striated tissues. These tissues are under the control of the somatic…

Q: Discuss the relationship between force and speed of movement during a muscular contraction.

A: Muscles respond to stimulus with a simple twitch. After perceiving the stimulus, there is a brief…

Q: Define the all-or-none principle.

A: According to All-Or-None principle, When threshold stimulus is applied to a neuron then it will…

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: Summation in a single muscle fibre means that Select one: a. the fibre increases the frequency of…

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

Q: Describe the structure of the sarcomere and explain how it enables muscle contraction according to…

A: Answer- The sarcomere is the functional unit of the muscle and it has the central role in the muscle…

Q: Using the tension graph, explain why skeletal muscle can exhibit tetany (sustained contraction) but…

A: Physiologic tetanus refers to sustained muscle contraction, which occurs due to the generation of…

Q: Explain the types of exercise that require more fast-twitchversus slow-twitch muscle fibers.

A: Skeletal muscles are made up of different types of muscle fibers (cylindrical muscle cell) which…

Q: Describe possible mechanisms for why blood pressure may have a greater change during the Valsalva…

A: Physical fitness is essential in our everyday lives, it benefits us in so many ways and makes us…

Q: List the three typical stages of a muscle twitch, as seen in amyogram.

A: Myogram is a graphic representation of the phenomena of muscular contractions.

Q: Graph and describe the relationship between movement velocity and the amount of force exerted during…

A: As the force-velocity curve suffering from muscular strength coaching by most circumstances, the…

Q: Describe the role of both ATP and calcium ions in muscle contraction.

A: Muscle contraction can be described as a process triggered by an action potential transported…

Q: Illustrate the Mechanics of Single-Fiber Contraction?

A: A muscle fiber is a cylindrical, single, multinucleated muscle cell composed of numerous myofibrils…

Q: Explain the length-tension relationship in skeletal muscle contraction.

A: Tension in muscles is composed of the forces generated by many cross-bridge formations. It is the…

Q: Describe the underlying causes of the decrease in V̇ O2 max that occurs with cessation of endurance…

A: The cells are the primary unit of life. An organism may be unicellular or multicellular, based on…

Q: Explain the key steps in the contraction of a skeletal muscle fiber beginning at the neuromuscular…

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

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: Explain what happens to the length of the A band,I band, and H zone during contraction.

A: A band, I band and H zone are the zones present in sarcomere

Q: Explain how the length of a muscle fiber at the time it is stimulated to contract affects the…

A: Introduction:- The functional unit of striated muscle is the sarcomere. This is the most fundamental…

Q: Explain the movement of ions into, out of, and within the muscle fber after Acetylcholine (ACh)…

A: The sarcolemma is the plasma membrane of the muscle cell that is surrounded by a basement membrane…

Q: explain why the force of a muscle contraction dependson the muscle’s length prior to stimulation.

A: The length-tension relationship of our human muscle states that specifically, the isometric tension…

Q: Compare the mechanisms involved in the major typesof muscle fatigue.

A: Muscle fatigue is defined as a decrease in maximal force or power production in response to…

Q: Explain why the hamstring muscles fatigue faster with the 5-lb ankle weight.

A: Hamstring injury is more commonly seen in athletes and sportspersons. In the back of the thigh, a…

Q: Including the muscle activity in the measurements of BCI make this system as: Dependent BCI…

A: Since we only answer 1 question in case of multiple question, we’ll answer the first question as the…

Q: Describe the difference in distribution of these three types of muscle fiber: slow twitch, fast…

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

Q: Explain the sliding filament theory of muscle contraction, including the following parts; thich…

A: Muscle contraction is the mechanism of generation of tension in the muscle fibers. The contraction…

Q: A&P1 Explain the difference between concentric and eccentric muscle contractions and give an…

A: Difference between concentric and eccentric muscle contractions.   Concentric muscle contraction…

Q: Describe what is happening to the following parts of a sarcomere during muscle contraction. a. H…

A: H band or H-zone is the central region of the A zone. H zone only contains thick filaments i.e.…

Q: Using a well annotated diagram explain the sliding filament theory of muscle contraction

A: Sliding filament theory explains the concept of muscle contraction which occurs due to protein like…

Q: Describe the importance and flow of calcium during a muscle contraction and muscle relaxation in a…

A: The muscle which can be controlled voluntarily are termed as skeletal muscles and the muscles which…

Q: A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast…

A: In skeletal muscle fibers, contraction in Slow oxidative (SO) fibers is relatively slow and use…

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.