What is the cause of the fused/complete tetanus (4) in the figure below? * Average tension (constant) Stimuli Complete tetanus (fused) Twitch Summation Incomplete tetanus (unfused) Time (msec) 02011 Pearson Education, Inc successive stimuli arrive before the relaxation of the preceding muscle twitch has been completed. At higher stimulus frequencies, there is no relaxation at all between stimuli. A single stimulus causes a muscle twitch. Each successive stimulus arrives after the preceding muscle twitch is completely relaxed. Tension (g)

Q: which decreases cytoplasmic calcium ion concentration The relaxation of skeletal muscle relies on…

A:

Q: Which of the following alters the force of skeletal muscle contraction?  the frequency of…

A: Skeletal muscle contraction refers to the process, that when a motor neuron signals a skeletal…

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: Which of the following is correct about muscle spindles? Detect changes in muscle length Perceive…

A: Muscle spindles are skeletal muscle sensory receptors within the body of a muscle that are able to…

Q: Outline the major neural adaptations a muscle undergoes to gain strength in the absence of muscle…

A: Ans. Muscles are specialized tissues in the human body that have the unique ability to contract and…

Q: On a muscle twitch recording, label the latent period, period of contraction, and period of…

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: Based on the picture below describe the different criteria that contribute to how skeletal muscles…

A: Muscles allow the body to move, keeps posture, and circulates blood throughout the body. Tendons are…

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 might stretching a cramping muscle INCREASE the cramping, as well as why would contracting the…

A: Muscles are the tissues that govern physiological processes by their contraction and relaxation. The…

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: Neutral stimulations modulate muscle force output. In the illustration below, fused tetanus is shown…

A: Fused tetanus is a physiological phenomenon observed in muscle contraction, particularly when…

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: The single-fiber twitch experiments shown here were generated by stimulating the muscle cell…

A: When a muscle is triggered by a single vibration, an action potential is generated that causes the…

Q: If the number of active cross bridges in skeletal muscle begins to decline although the rate of…

A: Option A: Fatigue

Q: Match the word/term with the appropriate characteristic fast fibers/ Type Ilb or Ilx fibers fast to…

A: Introduction :- Individual muscle fibres make up skeletal muscles. Muscle fibres, like muscles…

Q: γ-motor neurons control muscle tone by :-a- adjusting the supraspinal facilitatory dischargeb-…

A: Muscle tone refers to the maintenance of partial contraction which important for maintaining posture…

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: please explain in detail in your own words Differentiate between muscle tone, postural tone and…

A: Due to our answering policy, we can only answer one question at a time. Please repost the other…

Q: II. Real life problem. You are a trainer and are called on to the field where a player is down with…

A:

Q: How does the activation of vertebrate skeletal muscle differ from the activation of arthropod muscle…

A: Arthropods are lower animals and their complexity is not profound as compare to the higher animals.…

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: Muscle spindles are the sensory receptors that monitor the length of skeletal muscles. When the…

A: The muscles are involved in movements happening in an organism. These movements can be voluntary or…

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: Discuss the function of Golgi tendon organs in monitoring muscle tension.

A: Anything that triggers a response (or a reaction) and permits the organisms (plants and animals) to…

Q: What is the approximate amplitude in mV of the twitch in recording B? Be careful and note the…

A: Introduction  The amplitude is typically calculated from peak to peak. A high-frequency response is…

Q: Using the biceps brachii as an example, describe the biochemical and mechanochemical series of…

A: The biceps brachii is a bi-articular muscle, which implies that it assists to regulate the action of…

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: Select ALL that would INCREASE the strength of a muscle contraction: recruiting more slow-twitch…

A: Skeletal muscle cells are long and cylindrical, has voluntary control in action that is in under our…

Q: Given what you have learned from the first experiment, you prepare the other leg for a fresh…

A: Curare," which is a class of drugs that block nicotinic acetylcholine receptors (nAChRs) located on…

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: Real life problem.  You are a trainer and are called on to the field where a player is down with a…

A: In Reciprocal innervation, the extensor and flexor muscles of an arm or leg have a function opposite…

Q: true or fasle :  Eccentric muscle contractions at a constant velocity are be considered isokinetic.…

A: Concentric refers to a muscle that shortens under tension. Eccentric refers to a muscle that…

Q: dings forming a neuromuscular junction with a single muscle fiber. Membranes of axonal endings and…

A: Synspse is a structure that permits a neuron  to pass an electrical or chemical signal to another…

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 do these results tell you about when and how much you use your extensor muscles?

A: Humans have a well-developed muscular and skeletal system for the movement and locomotion of the…

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: Each of the pairs of phrases below describe steps during skeletal muscie contraction. The 2nd phrase…

A: Muscle tissue is a type of tissue which contain actin , Troponin and myosin proteins so as to allow…

Q: Muscle contraction is not the only process controlled in temperature-regulating reflexes. True or…

A: Muscle contraction is considered as the process, in which tension develops in the site present in…

Q: Which of the following is correct about muscle spindles?

A: Sensory receptors are specialised cells or multicellular structures that sense changes in both the…

Q: Which one of the following statements is the best description of a motor unit?     A single…

A: Motor unit is defined as a single motor neuron and all of the muscle fibers it innervates.

Q: Any stimulus above a maximal stimulus will elicit

A: Any stimulus above a maximal stimulus will elicit the same maximal response. Therefore, OPTION 4 -…

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: 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: When electrically stimulating a skeletal muscle and measuring the force of muscle contraction, which…

A: A skeletal muscle needs an action potential to be trigger contraction of the muscle fibers. The…

Q: Why do you think movement variability can be functional?

A: We will answer the first question since the exact one was not specified. Please submit a new…

Q: Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular…

A: Muscles are tissues that can contract and expand. The muscles can be grouped into three types based…

Q: The group la afferents from intrafusal fibers are rapidly adapting and show

A: Option B is the correct answer  increased firing during the dynamic phase that is maintained while…

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.