On the sustained contraction recording, indicate when the muscle twitches began to combine (summate), andlabel the period of tetanic contraction and the period of fatigue.

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: Describe the Exercise-Induced Muscle Soreness?

A: Exercise-Induced Muscle Soreness is the pain and stiffness felt in muscles several hours to days…

Q: Explain the different muscle contractions in relation to the squat exercises.

A: A squat can be described as a kind of strength exercise in which the trainee lowers their hips from…

Q: 1. A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. II.…

A: The spinal cord is the place where motor neurons are located. It is the site of interneurons and…

Q: Define isometric contraction

A: The contraction of the muscles can be explained by the sliding filament theory. According to sliding…

Q: What factors affect muscle contraction during bicep curls. Explain

A: The biceps curl mainly targets the biceps brachii, brachialis and brachioradialis muscles. These…

Q: Is there a difference in the time to fatigue of the dominant and non-dominant arm? Cite relevant…

A: The dominant forearm is the strongest forearm naturally. It is the hand that is always chosen to…

Q: GIVE 3 EXERCISE THAT CAN BE CONSIDERED AS A LOCOMOTOR MOVEMENT WITH FLEXION AND EXTENSION MOVEMENT…

A: Locomotor- These are the movements by which the body moves from one point to another either by…

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: Can you help me the name of the muscle of the labels in the picture?

A: The facial muscles, also known as craniofacial muscles, are a set of approximately 20 flat skeletal…

Q: Is the length of muscle contraction at the beginning of tetanic contraction the same or different…

A: A tetanic contraction can be defined as a sustained muscle contraction that evokes when the motor…

Q: If an individual completed 60-min of exercise at 40% of their maximal effort, which type of muscle…

A: Muscle fibres, also known as muscle cells or myofibers, are the basic structural units that comprise…

Q: What is the physiologic basis of muscle fatigue?

A: The muscular system of the body is comprised of three different types of muscles. These are-…

Q: Maximal muscle force changes continuously throughout the elbow flexion according to the joint angle.…

A: Introduction: The myofibrils are made of parallel bundles of protein microfilaments referred to as…

Q: Underline the error in each of the following statements and provide the correction. ii. Smooth…

A: Introduction Smooth muscles are involuntary muscles i.e. these muscles are not under conscious…

Q: Define passive tension

A: The main stimulus for the development of muscle size and strength is tension. It includes the right…

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: Explain why muscles are stiff (contracted) when rigor mortis occurs.

A: Rigor mortis is the condition in which there is the occurrence of biochemical changes after few…

Q: State three or more reasons why muscle twitch strengthcan vary even when stimulus intensity remains…

A: A muscle twitch is also known as muscle fasciculation. It can be defined as the process in which…

Q: A

A: Introduction Muscles are soft tissues that contract to produce a particular movement, fascicles are…

Q: State the difference/s of striated myofilament contraction and smooth myofilament contraction.

A: Muscle is a tissue which enables a person to perform the majority of the locomotor tasks. Muscle…

Q: Define synergist

A: Synergist is referred to as the muscle that is responsible for performing movements of the same set…

Q: Diagram the molecular events of the contraction-relaxation cycle. Be sure to highlight the roles of…

A: The muscular system is an organ system comprising skeletal, smooth, and cardiac muscles. It grants…

Q: What causes the variation of the measurements for the periods (latent, contraction, relaxation…

A: Motor neurons that are located in the motor cortex of the brainstem or the spinal cord innervate…

Q: Explain how the power curve differs between an athlete with a high percentage fast twitch fibers and…

A: There are two types of skeletal muscle fibers. The slow-twitch muscle fibers are also referred to as…

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: Why is tetanic tension so much greater than twitch tension?

A: Tetanic contraction is a muscle contraction produced through the high rate action potential…

Q: Identify and discuss the main muscle groups needed to perform 400 meter event.

A: Energy method and muscles used in 400 m race

Q: Identify and describe the three phases of a twitch contraction

A: Decrease in the length of a muscle or an increase in tension across it results in the contraction of…

Q: Based on the graph, describe the relationship (or lack thereof) between the maximum EMG activity and…

A: Electromyography (EMG) measures muscle response or electrical activity in response to a stimulation…

Q: 1. What is a neuromuscular junction? 2. Explain the "all-or-none" law of muscle contraction.

A: The muscular system consists of skeletal, smooth and cardiac muscles. These are responsible for the…

Q: Before testing a true 1-RM exercise, why should you allow your client to complete 3 trial…

A: RM (repetition maximum ) is often expressed as a one-repetition maximum or 1-RM. It signifies the…

Q: Station Name/recognize the muscle Provide: O: Origin I: Insertion A: Action Innervation le)

A: The skeletal muscles are a part of muscular system of the body. They are attached to the bone by the…

Q: A E

A: The muscular system of the human body is made up of muscles which are soft tissues that are found…

Q: In the EMG experiment. the measured force came from the contraction of which muscles? Check all that…

A: The electrical activity of the muscles and the nerves regulating the muscles can be measured using a…

Q: Differentiate isotonic, isometric, and isokinetic exercises

A: Isotonic exercises are the exercise where changes in it's length and joint angle. Isometric…

Q: At what frequency of stimulation did tetanic contraction occur?

A: The muscles are stimulated by the nerve impulses causing the contraction of the muscles. The muscle…

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.