What is the first and most direct energy source for muscle con￾traction? a. glucose b. ATP c. creatine phosphate d. glycogen

Q: What is a muscle fiber? How is it formed?

A: A single muscle cell is present in the muscle fibre. The physical forces within the body are…

Q: Muscle relaxation occurs when ________. a. calcium ions are actively transported out of the…

A: The human body is a well built machine in which all the organs coordinate together to make it work.…

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: Single-unit smooth muscle cells can stimulate each other because they have:|- a. pacemakers. b.…

A: Smooth muscles are involuntary in nature and non-striated muscle cell which lines the inner side of…

Q: What are the steps and ions involved in muscle contractions ?

A: Muscle contraction can be defined as the activation of tension generated sites within muscle fibers.…

Q: An energy storage compound that can be stockpiled in muscle cells for short-term use is (a)…

A: Creatine phosphate - is an energy storage compound that can be stock piled in muscle cells for short…

Q: Which statement best summarizes why muscles often work in pairs

A: A tissue that is soft and is found in most of the animal’s skeletal system is known as muscle.…

Q: Through which ATP-generating mechanism can long-lasting muscle contractions be sustained? a.…

A: Introduction :- Muscle contractions are defined by changes in the length of the muscle during…

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: Graph a simple muscle twitch and a contraction that results in tetanus.

A: Simple twitches are muscular contractions which are involved in normal body movements. Summation…

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: What happens to the I band and H zone as muscle contracts? Do the lengths of the thick and thin…

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

Q: Skeletal muscle is associated to the _________________. What makes up the muscle fiber?

A: Skeletal muscle is one of the three major types of muscles the other two being are the mood muscles…

Q: What happens when a muscle cell cannot generate enough ATP byaerobic respiration?

A: When a cell is very low on ATP, it will start squeezing more ATP out of ADP molecules by converting…

Q: Identify which muscle fiber types would be recruited for each of the following functions. Explain…

A: Muscle fibers  are composed of myofibrils that make up the skeletal muscles that involve in the…

Q: What are the function of muscle fibre?

A: Muscle is a widely occurring soft tissue in most animals. Muscle cells contain actin and myosin…

Q: The muscles of a professional sprinter are most likely to have ________.a. 80 percent fast-twitch…

A: Skeletal muscles can be grouped into fast and slow fibers based on how quickly they can contract and…

Q: In a skeletal muscle fiber, Ca2+ is released from a. ACh receptors. b. the motor end plate. c. the…

A: Skeletal muscle mainly attaches to the skeletal system via tendons to maintain posture and control…

Q: After a vigorous exercise, you may experience cramps in your leg muscles. Why does this happen?

A: Exercise is any bodily activity that enhances or maintains physical fitness and overall health and…

Q: What is the action of the muscle labeled G? A B C HOPU

A: According to guidelines we have to answer the first question only. so please kindly post the…

Q: •What is the role of tropomyosin in muscle contraction?

A: Tropomyosin prevent myosin from continuing to slide up the actin filament.

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: Muscle fatigue is caused by ________. a. buildup of ATP and lactic acid levels b. exhaustion of…

A: All living cells require energy to continue the physiological functions. For extracting energy they…

Q: when muscle fatigues, what does sarcomere look like?

A: A group of muscle fibers works together to produce a force. A muscle comprises muscle cell fibers…

Q: If a person exercises to achieve bigger muscles, what effort must be exerted and what actually…

A: Muscle hypertrophy: It refers to the increase in muscle cells due to excessive exercise. During…

Q: What Are the thick and thin filaments in muscle fibers that slide past each other called?

A: Thick filaments are composed of myosin proteins (myosin filaments) whereas thin filaments are…

Q: Relate the types of muscle fibers to muscle performance, and distinguish between aerobic and…

A: Aerobic means in the presence of oxygen and anaerobic means in absence of oxygen.  Muscle fiber…

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: What are some examples of movement created by the contraction of sarcomeres of the muscle cells?

A: Muscle tissues are of three types: Skeletal muscle, cardiac muscle, and smooth muscle. Each consists…

Q: The excess ATPs are stored in muscles as CPs? A. True B. False

A: Adenosine triphosphate (ATP) is a three-phosphate nucleotide. The addition of phosphorous to the…

Q: Which is true for striated muscles? a) may have spontaneous activity b) is not under the control…

A: Muscle are group of cells which perfom a specific function. They are responsible for movement. They…

Q: How would muscle contractions be affected if ATP wascompletely depleted in a muscle fiber?

A: Myofibril is also referred to as muscle fibril. They are the rod-like constitutions of the muscle…

Q: In which of the following types of exercise would creatine phosphate (CP) be an important source of…

A: Introduction The phosphate-storage molecule group includes creatine phosphate. This chemical can be…

Q: Write an account of Skeletal muscle contraction.

A: Introduction :- Skeletal muscles make up 30 to 40% of your total body weight. They're the muscles…

Q: What

A: Introduction :- ATP is critical for muscle contractions because it breaks the myosin - actin cross…

Q: Explain the elation between muscles,ATP energy, and the calcium ion.

A: Muscle is a form of tissue that allows the movement or support to the body of organisms.It contains…

Q: What can you conclude about normal muscle contraction?

A: Muscle is a soft tissue that is found in most animals. Muscle cells contain protein filaments of…

Q: Two muscles have the same diameter, but one is twice as long as the other. Which  muscle produces…

A: Given 1. Two muscles have same diameter 2. length of one is twice as compared to other.

Q: Regarding the muscles, why electric impulses are important in the contraction mechanisms? Explain.

A: Neuromuscular junction or NMJ is accountable for the transfer of electrical signals from the neurons…

Q: Predict the effect of the following on muscle contraction: A. Bitten by a black widow B. Curare C.…

A: Muscle contraction refers to the generation of tension at specific sites in the muscle fibers. It…

Q: What structure invaginates into the middle of the muscle cell to transport Ca2+ into the middle of…

A: Muscle contraction is a process in which the actin and myosin filaments slide past each other.…

Q: What will happen to the muscle if ATP was added, then salt? Explain

A: Muscles are the tissues that consists of longitudinal cells that helps in the movement in the body.…

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.