Describe in detail the events at the neuromuscular junction and how these events allow for the excitation-contraction coupling event to occur.  Be sure to also include in detail all the steps at the NMJ and the steps of the excitation-contraction coupling event, including the cross bridge cycle.

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: Summation of contraction is also known as wave summation . Describe the role of calcium in wave…

A: The primary function of wave summation is to produce a smooth and continuous muscle contraction. It…

Q: Describe the mechanical and biochemical properties of human skeletal muscle fiber types.

A: The Muscle is a soft tissue that is responsible for producing force and motion facilitated by the…

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: 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: subtractive technique that uses nerve stimulation at two points and subtracting the difference…

A: Nerve impulse  conduction is a complex phenomena and it starts at the point of stimulation which is…

Q: Why is Excitation Contraction Coupling important?

A: Muscles contraction  The contraction of muscle activated by the tension generating sites present in…

Q: Identify the steps that show how an action potentialproduced in the motor end-plate of the…

A: The muscular system comprises three major types of muscle cells - smooth muscle, cardiac muscle, and…

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: phase of muscle contraction in YOUR OWN WORDS.

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

Q: movement of sodium ions into the muscle cell at the nueromuscular junction causes wha

A: Neuromuscular Junction (NMJ) is the junction between the terminal branch of the nerve fiber and the…

Q: Isovolumetric contraction:

A: Isovolumetric contraction refers to an event during which the ventricular blood volume remains…

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: Describe the structural features of a neuromuscular junction andthe role of acetylcholine in…

A: Introduction  Complex organisms such as Multicellular organisms needs control and coordination…

Q: Shown below are changes that occur in skeletal muscle during vigorous physical activity.  For each…

A: Answer 1:  ↓ Po2 - decreased HbO2 saturation, decreased free O2

Q: Define and describe the function of slow oxidative myofibers.

A: Myofibers are the basic contractile unit of muscle tissue, and each myofiber is composed of many…

Q: The motor unit firing patterns are measured in a human hand muscle using an electromyography (EMG)…

A: The EMG pattern observed as the individual voluntarily attempts to make a low-level force of…

Q: List five proteins of the myofilaments and describe their physical arrangement.

A: The myofilaments are the proteins that make up the contractile elements of muscle cells. There are…

Q: Discuss how calcium is a signaling molecule that causes the contraction of the sarcomere.  This…

A: In an eccentric contraction of the skeletal muscle, the muscle lengthens under tension because there…

Q: Describe the major events that occur when a muscle fiber contracts. Include all chemicals,…

A: Numerous bundles which make up the skeletal muscle are called fascicles and each of these is…

Q: The following is an oscilloscope tracing displaying the muscle twitch of an intact, viable frog…

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: Briefly explain ultrastructrure of myofibril.

A: The human skeletal muscles are made up of many muscle bundles or fascicles. Different muscle bundles…

Q: Describe a cycle of cross-bridge activity during contraction and discuss the role of ATP inthis…

A: 1. when Ca+ binds to the troponin, the active site on the actin is exposed 2.  myosin and actin form…

Q: Discuss some of the differences, and similarities if any, of smooth muscle contraction compared to…

A: The organ system that is involved majorly in the movement of the body is known as the muscular…

Q: What is the maximum distance that diffusion is effective for oxygenating a muscle cell? How does the…

A: Introduction :- Muscle cells are also known as myocytes and these are of different types :- skeletal…

Q: Determine the isoelectric point of myofibrillar proteins here in this experimental data

A: myofibrillar proteins are proteins found in muscles that help to contract them, comprising roughly…

Q: explain how the shortening velocity can be varied from very fast to very slow even though the load…

A: Muscle contraction will depend upon two types of velocity. The twitch and tetanic. The twitch refers…

Q: Describe the function and source of calcium ions in initiatingcontraction in skeletal muscle?

A: Introduction  Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride…

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: G7

A: We know that Every branch of motor nerve cells forms one junction with the muscle fiber. This…

Q: Order the following events of excitation and excitationcontraction coupling. Put 1 by the first…

A: A motor neuron is responsible for the transmission of a stimulus to the muscle tissues. A motor unit…

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: Distinguish between concentric, isometric and eccentric contractions, the physiology of the…

A: Through the cycling of actin and myosin cross-bridges, a muscle fibre produces tension. The muscle…

Q: Describe and explain the cross-bridge cycle very well. PLEAS

A: Sarcomeres are the ultimate units of muscle contraction. It was prove that the A band occupies about…

Q: Which of the following are true regarding length/tension relationships in muscle?

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: Discuss why fast glycolytic fibers develop more force than slow oxidative fibers.

A: Muscle tissue is a specialized tissue found in animals which allows movement. Muscle tissue consists…