What happens to calcium ions when muscle contraction ends and relaxation begins? O The ions diffuse back into the motor neuron O The ions must be actively transported back into the sarcoplasmic reticulum The ions diffuse back into the capillaries to be stored in the bones The ions remain stored within the Z-lines of the sarcomere The ions diffuse into the T-tubules and are stored there

Q: Which of the following is NOT true regarding actin? O It contains troponin and tropomyosin O It is a…

A: Among the given options, option (d) is the most appropriate. All the mentioned statements are true…

Q: Most skeletal muscles contain which of the following? O fast twitch fibers O slow twitch fibers O…

A: * Skeletal muscle functions in voluntary actions hence called as voluntary muscle. *Skeletal muscles…

Q: Weakening of muscles seen in aging is caused by loss of fiber function, with no change in fiber…

A: Aging is defined as progressive changes in biological, physiological, psychological, social, and…

Q: Which is the order of glycolytic capacity between these muscle fiber types O I> lla > Ilx O Ix > la…

A: The contraction of the muscle fibre is explained by the muscle contraction theory by the 2 muscle…

Q: Motor neurons innervate muscle fibers at specialized synapses called_______ . The release of…

A: In “motor neurons”, the cell bodies are located in the spinal cord, motor cortex, or brainstem. The…

Q: The endplate potential decreases with distance because

A: The end plate potential is a potential that propagates to the neighbouring patch of muscle fibre…

Q: Skeletal muscle tone :-a- is a dynamic stretch reflexb- has a dynamic state c- is increased during…

A: The muscular system of the body is the system of muscles that provides strength, shape and…

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

A: Option A: Fatigue

Q: Neurons controlling skeletal muscle contraction are which type? Multipolar motor neurons Bipolar…

A: The neurons are classified into different categories on the basis of certain features. They can be…

Q: Why does a skeletal muscle fibers always produce the same amount of tension with a single stimulus?…

A: Muscle is a delicate tissue found in many creatures. Muscle cells contain protein fibers of actin…

Q: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: The contraction of skeletal muscle fibers is prevented by regulatory proteins located on the: O thin…

A: Muscle contraction is referred to as the tightening of the muscles present in the body of an…

Q: What is the function of calcium in muscle contractions? to bind to troponin and change its…

A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…

Q: In your own words describe how acetylcholine ,calcium,and ATP are involved in the process of muscle…

A: Muscle contraction is a process where tension-generating sites in the muscles fibers are activated…

Q: complete tetanus    Has increased muscle length with no change in tension.   eccentric…

A: The contraction of the muscle generates a force called as muscle tension. There is also generation…

Q: During cross bridge cycling in skeletal muscle, force is created by the power stroke of the: actin…

A: The cross bridge cycling exhibits the shortening of muscles because of the movement of the…

Q: During muscle contraction, what does calcium bind to in skeletal muscles? Tropomyosin O Actin Myosin…

A: Skeletal muscles are one of the major type of muscle where it works under the voluntary control of…

Q: Which of the following correctly states the importance of an action potential to muscle contration?…

A: Muscle contraction helps in the movement of muscles. It causes the muscle fibers to contract to…

Q: As sarcomere shortening progresses during muscle contraction, which structure gets progressively…

A: A muscle contraction:-It can be defined as an increase in the tension of the muscle.-It can also be…

Q: Which of the following is in the correct order of largest to smallest O Muscle, bundle of…

A: The muscular system is a part of the cytoskeletal system, which is responsible for the movements…

Q: Why does a skeletal muscle cell generate the same amount of tension with each single stimulus? O…

A: Neural control initiates the formation of actin and myosin cross bridges, leading to the sarcomere…

Q: What is the best description of a contraction of the sarcomere Myosin pushes the actin fibers away…

A: Muscles are the tissue that are responsible for providing the movement to the body. It also…

Q: Based on your understanding of skeletal muscle fiber physiology, which of the following processes is…

A: ATP is the adenine tri phosphate and is the instant source of energy .It is used in many of the…

Q: an isotonic concentric contraction, muscle length shortens muscle tension exceeds the force of the…

A: Concentric and eccentric isotonic contractions are the two forms of isotonic contractions. The…

Q: An INCREASE in has no direct effect on increasing tension during skeletal muscle contraction.…

A: The muscles which are attached to the bones, can contract voluntarily and are mainly involved in…

Q: In the absence of _____, a contracted skeletal muscle will not relax but will develop rigor mortis…

A: Introduction After the death of an individual, several changes take place inside the dead body. The…

Q: Repetitive stimulation of a skeletal muscle fiber will cause an increase in contractile strength…

A: Muscles are tissues which helps in locomotion and motion . There are different types of muscles in…

Q: The Terminal Cisternae are: OA. The basic contractile unit in skeletal muscle O B. Equivalent to the…

A: Terminal cisternae In anatomy, these are defined as the areas that are present in the muscle cells…

Q: Which of the following is NOT true of fast oxidative skeletal muscle fibers? All of the above…

A: Introduction: Muscular fibres are cells found in muscle tissue that are designed specifically for…

Q: Which ion starts the muscular contraction by binding to myofilaments? Potassium Chloride Calcium…

A: The muscular system whose origin can be traced to the middle germ layeris responsible for the…

Q: The sarcomeres in a muscle are the cell membranes of skeletal muscle cells contractile units of the…

A: cells, contractile and elongated thread-like structures called myofibrils are seen. Myofibrils are…

Q: What happens after Na+ and K+ rush into and out the muscle cell at the neuromuscular junction (NMJ),…

A: Neuromuscular Junction is the junction between the terminal branch of the nerve fiber and the muscle…

Q: Why does continuouns calcium release within a muscle fiber cause greater tension? Acticates more…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: In which of the following locations would you most likely find the tissue known as perimysium?…

A: Skeletal muscle is responsible for movement of various parts of the body and locomotion. These…

Q: Contraction of muscle fibers in skeletal muscle is initiated by the uptake of calcium by the…

A: Movement refers to any change in body position. It is a fundamental characteristic of living beings.…

Q: When compared to normal muscle, the response of the denervated muscle to electrical stimulation…

A: Normal muscle fibers appear polygonal in shape whereas denervated muscle appears angular and…

Q: Acetylcholinesterase is the enzyme that breaks down and inactivates acetylcholine. Some nerve gases…

A: Nerve gas binds to acetylcholinesterase enzyme but only at 1 site. Nerve gas has a phosphorus group…

Q: Which of these statements below would NOT BE TRUE regarding skeletal muscle activity? most muscles…

A: A muscle is a group of tissues that aid in movement of different parts of our body. They are made of…

Q: The muscle fibers with the fastest contractions are slow oxidative fast oxidative O fast glycolytic…

A: The muscles are responsible for movement of body parts. These are also involved in generating heat…

Q: Which of the following statements are true? (choose all that apply) The Z-disc is found in the…

A: The unit of the muscle is known as sarcomere that shows massive molecular events during muscle…

Q: Which of the following would NOT occur as a result of regular exercise to a specific muscle group…

A: The exercising involves the training of muscles by putting heavy load on them, due to exercising the…

Q: What happens when the muscular action potential spreads through transverse (T) tubules of the…

A: T-tubules are augmentations of the cell membrane that enter into the center of skeletal and…

Q: ge-sensitive protein nels open and allow Acetylcholi syn elease from terminal of the SR. Ca2+ flows…

A: The skeletal muscle cells and neurons can get excited as they have a capacity to generate the action…

Q: Why does continuous calcium release within a muscle fiber cause greater tension? O Activates more…

A: Maximal tension in muscle happens when thick and thin fibers crossover greater extent inside a…

Q: Why does damage to upper motor neurons cause spasticity and muscle cramps? Extracellular calcium is…

A: Spasticity is defined as a condition or state in which the muscles will stiffen or tighten thus,…

Q: Now in your own words, EXPLAIN (1) howa neural impulse is transferred to a muscle cell this is the…

A: Neural impulse or a nerve impulse refers to a signal that is transferred along the nerve fiber. It…