Which of the following can respond to increased stimulation with a graded response: a) motoraxon b) whole muscle c) motor unit

Q: Discuss the sequence of events between a Motor Neuron Action Potential and Skeletal Muscle Fiber…

A: The nervous system comprises the brain, nerves and spinal cord. The nerves are responsible for…

Q: Define the term Twitch Contractions?

A: A twitch is often described as a period of muscle contraction and relaxation in a muscle in response…

Q: Which Factors Determining Muscle Tension?

A: The soft tissue-like structure found in the majority of the animals including human beings is known…

Q: explain the sliding filament mechanism of muscle contraction?

A: The Muscle is a soft tissue that is composed of multiple muscle fiber called myofibril stacked with…

Q: Name the types of muscle contraction and briefly explain each.

A: The muscular system comprises of skeletal muscles, smooth muscles and tendons. This system plays an…

Q: Distinguish three types of skeletal muscle fibers?

A: The skeletal muscle is one of the three critical muscle tissues in the human body. Each skeletal…

Q: Explain why stretching exercises may reduce the incidence of muscle injuries?

A: Skeletal muscle injury represents the great part of all traumas in sports medicine, with an…

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 is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: What are the steps and ions involved in muscle contractions ?

A: Muscle contraction can be defined as the activation of tension generated sites within muscle fibers.…

Q: List the types of Skeletal Muscle Fibers?

A: Muscles are one of the four main types of tissues present in the human body.

Q: What is the time relationship between a skeletal muscle fiber action potential and the resulting…

A: A skeletal muscle is a part of the “muscular system” of our body. A fiber of a skeletal muscle is…

Q: What are Twitch Contractions?

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

Q: How can I describe skeletal muscle contraction using the words "upper motor neuron" and "lower motor…

A: Skeletal muscles represent one of the three types of muscles including smooth muscle and cardiac…

Q: What conditions will produce the maximum tension in a skeletal muscle fiber?

A: Muscles are required in breathing, talking, running, walking, and any body movements. Actin and…

Q: Explain Molecular Mechanisms of Skeletal Muscle Contraction?

A: The soft tissue-like structure found in the majority of the animals including human beings is known…

Q: What cellular changes could cause the skeletal muscle to become rigid?

A: Skeletal muscle cells do not relax or remain in a rigid state due to lack of ATP and so muscle…

Q: Which type of contraction develops more muscle tension: isotonic or isometric?

A: Muscles are the tissues that can change their length and cause movement of the body parts.

Q: myofibrils or sarcomeres present in smooth muscle fibers?

A: Myofibrils are the long filaments which are arranged parallel to each other to form muscle fibers.…

Q: Identify three processes in a muscle twitch that require ATP?

A: When one muscle fiber contracts in response to a command (stimulus) from the nervous system, it is…

Q: Which of the following is the smallest: muscle fiber, thick filament, or myofibril? Which is…

A: Myofibrils are made up of small structures known as Myofilaments. There are basically two main kinds…

Q: Which types of muscle have t-tubules, sarcoplasmic reticulum?

A: t- tubules or transverse tubules are basically the extensions of cell membrane. They are formed from…

Q: A skeletal muscle can be stimulated, under laboratory conditions, with a supramaximal stimulus. Is…

A: As the nervous system produces electrical stimuli called an action potential, it passes through a…

Q: What effect does increasing the frequency of action potentials in askeletal muscle fiber have upon…

A: With alternative arrangements of light and dark band, skeletal muscles are striated muscles. They…

Q: What is muscle tone?

A: To answer this question we must have knowledge about physiology of our body.

Q: Based on various types of muscle fibres, what factor(s) determines the speed and duration of a…

A: Muscle contains muscle fiber cells which are specialized for contraction. Based on location,…

Q: List the four primary signal transduction pathways in skeletal muscle.

A: Signal transduction is defined as the ability of a cell to change behaviour in response to a…

Q: What factors determine the duration of an isotonic twitch in skeletal muscle? An isometric twitch?

A: To a single action potential, twitch is the mechanical response of a muscle fiber. Before the…

Q: Muscle fibers contain which of the following?

A: Muscles are protein filaments that allows the body to move, speak and chew. They contain…

Q: What is the process of an action potential in muscle tissue?

A: The question asks about the process involved in an action potential of muscle tissue.

Q: Where would you expect to find the greatest concentration of calcium in resting skeletal muscle ?

A: The human and other vertebrates contain three important muscle types, such as skeletal muscle,…

Q: Skeletal muscle cells have the ability to do all of the following EXCEPT _____.     activating…

A: Skeletal muscle is a type of three major muscle types, the others being cardiac muscle and smooth…

Q: If individual muscle fibers always contract the entire way when stimulated, how are we able to…

A: A muscle fiber is a long cylindrical cell with multiple oval nuclei just beneath its sarcolemma or…

Q: What factors are responsible for the amount of tension a skeletal muscle develops?

A: The muscular system, composed of tissues, capable of changing their shape, is responsible for…

Q: why does a rapid series of muscle twitches yield a stronger overall contraction than a single…

A: Muscle contraction that results from a single action potential is called a twitch. When there is a…

Q: How does varying the frequency effect contraction force? Which interval caused the greatest…

A: * contractions is of three types mainly Isotonic  Eccentric Concentric *Concentric contractions…

Q: Why does repeated stimulation of the muscle (at maximum stimulus) before it has completely recovered…

A: Muscle contraction is the phenomenon of decreasing in size or shortening or compacting the muscle…

Q: What causes increases rate of contraction?

A: The heart and blood vessels are the main organs of the cardiovascular system. The heart, which is…

Q: What is the energy utilization involved in causing a muscle to contract ?

A: Muscle contraction occurs when the actin and myosin filaments slide past each other. This process is…

Q: What are two observable differences in shape and size of nuclei of the muscle fibres compared to…

A: The nucleus is a central organelle of the cell, containing most of the cell's genetic material. It…

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.