Stimulation of a muscle fiber by a motor neuron occurs ata. the neuromuscular junction.b. the transverse tubules.c. the myofibril.d. the sarcoplasmic reticulum.e. none of the above.

Q: During the contraction of a vertebrate skeletal muscle fiber,calcium ions(A) break cross-bridges as…

A: Skeletal muscles are voluntary muscles. It attached to bone by tendons. It helps in movement of…

Q: The sliding filament mechanism describes the process during which: a. actin and myosin slide…

A: The muscles of the body serves main role in the movement of the body parts such as legs, arms and…

Q: f a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative…

A: T tubules or the transverse tubules are the extensions of the cell membrane that penetrate into the…

Q: When a higher voltage is applied to the skeletal muscle, the force of contraction _____ and…

A: Skeletal muscle fibres has the ability to cause muscle contraction if it encounters an appropriate…

Q: As skeletal muscle contracts, one or more bands of the sarcomere become narrower and disappear, and…

A: When the myosin binds to the actin filaments, it forms the cross-bridge that causes a shortening of…

Q: Why is the latent period longer during an isotonic twitch of a skeletalmuscle fiber than it is…

A: Muscle tissue is a well-vascularized soft tissue present in the muscles of an animal body. Muscle…

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: What happens to sarcomeres when actin and myosin filaments in a muscle fiber interact during the…

A: Answer - According to the question option B is correct which says : -  sarcomeres usually get…

Q: ___ fibers can temporarily store ___ in myoglobin. a. Fast-twitch . . . ATP b. Slow-twitch . . .…

A: Answer: Introduction: Skeletal muscles formed by distinct muscle fibers. And like muscles…

Q: The type of muscle used to move the leg when walking isa. skeletal.b. cardiac.c. smooth.d. All of…

A: A group of cells having a similar structure, function, and origin is called tissue. Muscles are the…

Q: Which of the following is responsible for muscle movement? A. Antagonists B. Isometric Contraction…

A: Q.1  Answer :-  Antagonist and agonist muscles often occur in pairs, called antagonistic pairs.…

Q: Nervous stimulation of musclesa. occurs at a neuromuscular junction.b. results in an action…

A: Answer is d.)  All of these Correct.

Q: The function of Ca2+ in skeletal muscle contraction is toa. cause an allosteric change in myosin so…

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

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: The decrease in active force that occurs at lengths longer than the optimal length is caused by: O…

A: According to the question, the decrease in active force that occurs at lengths longer than the…

Q: A muscle fiber is the same thing as a: a) myofibril. b) myocyte. c) myofilament. d) fascicle.

A: MUSCULAR TISSUE:- These tissues are different from other tissues as they have the ability to…

Q: Which of the following does NOT contribute to muscle fatigue? A. K+ accumulation B. ADP and…

A: Introduction Muscle fatigue is a condition in which muscles loses the ability to perform overtime.…

Q: How could the nervous system cause a skeletal muscle to produce themost forceful contraction it is…

A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…

Q: Which of the following is false regarding smooth muscle? A. It contracts slower than skeletal…

A: There are three types of muscles skeletal, cardiac and smooth muscles.

Q: if, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a…

A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…

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: e events involved from the time a motor neuron fires an action potential to the time when the muscle…

A: Neurons are the nervous system's basic functional unit. They play a role in neurotransmitter…

Q: A motor neuron, plus the muscle fibers to which it attaches, constitutes a functional unit called a…

A: Introduction Motor neurons are the part of CNS (Central Nervous System) they arise from the spinal…

Q: All of the following characteristics apply to skeletal muscle except

A: Option (d) is right answer.  Because they do not contain intercalated discs.

Q: What type of muscle fibers would you expect to find in the leg muscles of a well-trained marathon…

A: Correct answers : d) Fibers with many mitochondria   It is the correct answer because a well…

Q: How would muscle contractions be affected if skeletalmuscle fibers did not have T-tubules?

A: Muscles:                    In animals, soft tissues found known as muscles. Muscles cells contain…

Q: Describe the organization of a motor unit in vertebrate skeletalmuscle, and explain how recruitment…

A: Skeletal muscles are attached to bones by tendons, and they produce All the movements of body parts…

Q: - The sacromere is: a- A functional unit of the skeletal muscle b- The area between two intercalated…

A: Muscle cells, commonly known as myocytes, are the cells that makeup muscle tissue. There are three…

Q: Rigor mortis occurs following death because a. tropomyosin remains over the myosin binding sites of…

A: Introduction: Rigor mortis helps in assessing the time since death to determine if the body had been…

Q: When a muscle fiber is stimulated with repeated stimuli, the contraction force is summed due to: a)…

A: INTRODUCTION Summation is that the . occurrence of additional twitch contractions before the…

Q: a. Ca2+ does not affect muscle force. b. The muscle cell eventually habituates to the level of Ca2+…

A: Structure of muscle cell A muscle cell consists of hundreds of fibers. A single fiber consists of…

Q: A bacterial toxin is known to block the release of ACh at the motor end plate of skeletal muscle.…

A: (c) the ability to stimulate the muscle is impaired

Q: Which of the following statements is unique to skeletal muscle? O a) skeletal muscle has striations…

A: Muscular tissue is the specialized tissue in animals which applies force by contraction  for the…

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

A: Skeletal muscles -- are the muscle which are in our voulantry control These  are attached to the…

Q: As you fatigue, the force of your muscles decreases. What physiological processes explain the…

A: Fatigue can be explained as, a temporary decrease in the ability to perm physical exercise or…

Q: Post a diagram on how a muscle sarcomere contracts.please make reference to the parts of…

A: Pls refer below for solution :

Q: .. The difference between FF (type II, glycolytic) motor unit and S (type I) motor unit is that a S…

A: Introduction:- When identifying muscle fibres, two factors to consider are how fast some fibres…

Q: The transverse tubular system: A)speeds the transmission of an action potential down the length of a…

A: *Tansverse tubular system is a network of interconnecting rings that surrounds a myofibril. *It…

Q: post a diagram on how a muscle sarcomere contracts. please make reference to the parts of the…

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

Q: The muscle cell membrane of the neuromuscular junction is called the A. Synaptic cleft B. Motor end…

A: Introduction The neuromuscular junction (NMJ) is a highly specialised synapse that connects a motor…

Q: Which of the following sentences is NOT correct? A. White fibers make up fast-twitch muscle B.…

A: Living organisms are highly organized as they contain specialized, coordinated parts. All living…

Q: A decline in a skeletal muscle's ability to maintain a constant level of force or tension after…

A: Skeletal muscles Skeletal muscles are the muscles that cover the bone of the body.

Q: Calcium is released from the sarcoplasmic reticulum following death. Without available ATP, rigor…

A: Muscles are required in breathing, talking, running, walking, and anybody's movement. Actin and…

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.