Muscle fatigue is caused by ________. a. buildup of ATP and lactic acid levels b. exhaustion of energy reserves and buildup of lactic acid levels c. buildup of ATP and pyruvic acid levels d. exhaustion of energy reserves and buildup of pyruvic acid levels

Q: 19. The function of transverse (T) tubules A. They store calcium B. They provide elasticity to the…

A: There are different type of muscles like   Cardiac muscle: The cardiac muscle is a striated muscle…

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: A person with a high Vo2maxa. needs less oxygen than someone with a low Vo2max.b. has stronger…

A: VO2 max test is typically conducted in a sports performance lab to establish an athlete's aerobic…

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: Why might multiple, small motor units be advantageous over a single large motor unit?   A. They…

A: Motor units participate in regulation of movement of muscle fibers.

Q: Muscles may be named using?  a. speed b. age c. action d. myofilament type

A: Muscle is a soft tissue present in human beings and animals. Muscle cells are composed up of protein…

Q: Which of the following statements best describes the sliding filament mechanism of muscle…

A: Actin- It is the main component of thin filament in muscle fibre, cytoskletal protein. Myosin-motor…

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: During a concentric contraction of a skeletal muscle fiber, myofibrils a. lengthen. b. remain the…

A: Muscle fibers are composed of myofibrils. The myofibrils are made up of myosin and actin filaments…

Q: muscle that assists the muscle primarily responsible for a given action is a __________.…

A: Myofibrils are the the smallest part of the muscle which helps in the contraction. By alternating…

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: Which statement is accurate about an agonist? a. It opposes the function of the prime mover. b. It…

A: The majority of the animals consist of soft tissue called muscles. They are responsible for…

Q: Muscular atrophy occurs when: A. A patient lacks the coordination needed to walk normally. B. Muscle…

A: Muscular atrophy refers to the loss of skeletal muscle. The atrophied muscle normally smaller and…

Q: What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?…

A: Muscle contraction is the activation and formation of tension sites with muscle fibres, while muscle…

Q: Why take magnesium when cramping a muscle

A: A muscle cramp is an involuntarily and forcibly contracted muscle that does not relax. These are…

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: In order to excite a skeletal muscle, the neurotransmitter must bind to: a)calcium channels. b)…

A: Neurotransmitters such as acetylcholine bind to receptors on the muscle surface and elicit a…

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: In relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c.…

A: Tropomyosin is known to block myosin-binding sites on actin molecules. It prevents the formation of…

Q: 2 T tubule 3. ATP 4. lateral sacs of the sarcoplasmic (c) supplies energy for the reticulum 5.…

A: Muscle contraction begins when the impulse arrives at a particular muscle which is going to be…

Q: structural organization of muscle fibers makes it possible to produce contractile force

A: Answer: Sarcomere of Muscles fibre or myofibre is the basic contractile unit of skeletal muscle.

Q: When an action potential runs down the surface of the sarcolemma, the muscle doesn't immediately…

A: Muscles  play an important part in locomotion and movement. They are derived from mesodermal layer…

Q: a. Explain why the muscles of the legs of a childwith Duchenne’s muscular dystrophy appearlarge.b.…

A: Duchenne's muscular dystrophy is a non-inflammatory, progressive disease of skeletal muscle. It is a…

Q: Type I of muscle fibers are utilize both oxidative metabolism O and anaerobic glycolysis O utilize…

A: The three types of muscle fibres are slow oxidative (SO), fast oxidative (FO) and fast glycolytic…

Q: Select the best answer or answers from the choices given: The function of the T tubules in muscle…

A: Muscle contraction can be defined as the process in which the length of the muscles decreases and…

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: Chickens are capable of only brief bursts of flight, and their flying muscles consist of fast…

A: Introduction: Wings of birds are responsible for giving them flight. They possess feathers and the…

Q: Find the false statement about white muscle fibers (glycolytic fibers)? Se ect one: a. Fiber…

A: Depending upon the presence or absence of myoglobin muscle fibres can be of two types that is ref…

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: 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: What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?…

A: Muscle contraction is the action of activation and generation of tension sites with muscle fibers…

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: One of the primary reasons that one individual is faster in a 50-meter sprint than another is a. a…

A: The speed of a person is dependent on the type of muscle fiber that is present in an individual. The…

Q: Why would a sprinter experience muscle fatigue before a marathon runner would?

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

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: 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: The prospect of inhibiting myostatin and growing larger muscles may be tempting to a great many…

A: Muscles are the soft tissues present in the body and the cells consists of the protein filaments…

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: The ocular muscle is an example of: a. Slow twitch muscle O b. Fast tetanus muscle C. Slow tetanus…

A: Ocular muscle has a unique slow non  twitch  , fatigue resistant muscle fiber    Its a  slow twitch…

Q: The diagram below represents the terminal cisterna in a muscle. Name and briefly explain the…

A: Calcium causes contraction by reacting with regulatory proteins that prevent actin and myosin from…

Q: a) Describe how the isolated muscle behaved as it was stretched progressively. b) What effect…

A: The all-or-none principle asserts that the intensity of a nerve cell's or muscle fiber's reaction is…

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: During low intensity, long-duration exercise (long-distance running, for example), fatigue is NOT…

A: There are two types of exercises: low intensity-high duration and high-intensity short duration.…

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.