Explain how muscle fibers are recruited in a movement with varying force demands. What are the advantages of the fibers being recruited in this manner?

Q: The total force (crossbridge + titin strain) generated in an eccentric actomyosin crossbridge is O…

A: The total force (crossbridge+ titin strain) generated in an eccentric actomyosin crossbridge is…

Q: 2. (a) Both myoglobin and haemoglobin bind oxygen. If muscle did not contain myoglobin, what would…

A: Hi! Thanks for your question. As you have posted multiple questions and have not mentioned which one…

Q: question 3

A: 1. With age the collagen increases in the tissues. Collagen is stiff as compared to muscles.

Q: 38. Which of the following (are) is true when 50% of the motor units are stimulated?   A. the…

A: A motor unit is composed of a Motor neuron and the skeletal muscle fibers supplied (innervated) by…

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: What happens if ATP is not available in the sliding filament theory?  When is the maximum force…

A:

Q: 4. Fleas can jump up to 40 times their body length. However, calculation on the biomechanics of the…

A: Hi! Thanks for your questions. As you have posted multiple questions and have not mentioned which…

Q: 2. Which of these activities is not related to the muscular system? A. The secretion of hormones…

A: Since there are multiple questions in this particular question, I will answer the first one for you.…

Q: 5.What is possibly the most important adaptation that the body makes in response to endurance…

A: Given: Need to find the important adaptation of body in response to endurance training -VO2 max and…

Q: 2.If you were running an experiment and interrupted the interaction between thin and thick…

A: Introduction :- When a sarcomere (a) contracts, the Z lines become closer together and the I band…

Q: 33. Which of the following sentences is NOT correct? A. Cancellous bone (trabecular) is spongy bone…

A: A bone forms a part of the vertebrate skeleton in animals. They protect the various organs of 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: Explain the difference between a single muscle fiber contraction and a skeletal muscle contraction…

A: When an Action Potential travels along the Nerves to the Muscles, a Muscle Contraction is triggered.…

Q: 9. Which of the following correctly describes the end plate potential (EPP)? A)It is primarily…

A: End plate potentials (EPPs) are the voltages which cause depolarization of the muscle fibers caused…

Q: 1. We have a twenty-five-year-old athlete who has an amputee from above the knee. Describe a…

A: For the amputee athlete a Running blade prostheses should be chosen. Running Blade prostheses has…

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

A:

Q: As lactic acid and other substances accumulate in an active muscle, they stimulate pain receptors,…

A: When the body taps into anaerobic metabolism, it uses the body’s supply of stored sugars, known as…

Q: Describe the roles of ATP in the sliding filament mechanism of skeletal muscle contraction.    (b)…

A: Sliding past theory explains the process of various muscle proteins such as actin and myosin sliding…

Q: Briefly describe why contraction of the muscle cell is called “sliding filament theory” (what is…

A: During skeletal muscle contraction, a motor neuron stimulates the skeletal muscle fibers. The…

Q: 1. As you breathe in, does it help you to relax/calm your body and release the feeling tense? Why?…

A: Breathing exercise is an exercise which is done intentionally for the promotion of healthy and…

Q: Define the Myopia Problem and Discuss 2 solutions to the myopia problem?

A: Myopia - Commonly referred to as short sightedness . In myopia a person can see the near objects…

Q: 3. A condition known as Fibrodysplasia Ossificans Progressiva is a rare and genetic disease where…

A: The condition i.e. Fibrodysplasia Ossificans Progressiva is a rare condition which is also known as…

Q: 17. Which of the following choices is CORRECT? A. Myofibrils extend the length of a muscle fibre B.…

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

Q: A healthy 32-year-old man lifts weights regularly as part of his workout. In one of his biceps…

A: The muscle fibers contain myofibrils that are composed of repeating units of contraction called the…

Q: 6 As calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the…

A: Excitation–contraction coupling: It is a physiological process which involves the conversion of an…

Q: Which of the following would be recruited in a muscle stimulation when contractile strength…

A: Small motor units, typically consisting of one nerve and a few muscle cells, are recruited first.

Q: 1. What progressive muscle relaxation performed in Two scenarios shown in the picture?

A: Introduction:- Muscles is soft tissues. Many stretching fibers make up muscles.humna body's have…

Q: 9. The binding of the myosin head to the free binding site of the actin filament results in the…

A: Introduction  Actin and myosin, coupled with the regulatory proteins known as troponin, tropomyosin,…

Q: What are the characteristics of a striated muscle that make it durable?

A: Striated muscle It is a muscle tissue that constitutes repeating functional unit sarcomeres. The…

Q: Demonstrate your understanding of how the muscular system and skeletal system interact in locomotion…

A: Bones and muscles are very important for our body. Many organs like liver, heart etc. are protected…

Q: 1. Which muscle type has the most elaborate connective tissue wrappings? EXPLAIN.

A: As per our guidelines we are allowed to answer only one question, please repost the next one.…

Q: 8. Which of the • A. The next contraction will be bigger than the previous contraction. • B. The…

A: Answer. Calcium ions are very important for muscle contraction. When a muscle is initiated by an…

Q: 5. Diagram the structure and organization of the actin and myosin filaments including the myosin…

A: Note-  As we are allowed to do only one question at a time so I will provide answer to one question…

Q: 8. How would the increased stimulus intensity lead to more muscle activity (i.e., increased force)?…

A: Introduction :- The neuromuscular junction (NMJ) is a kind of synaptic connection which is formed…

Q: 2 a) What does calcium do in a skeletal muscle cell and where in the cell does it come from?…

A: Skeletal muscle contraction is a complex phenomenon and involves various processes requiring special…

Q: Which neurotransmitter triggers a muscle contraction?

A: The chemical compound that work as messenger transmit message across the synapse from a nerve cell…

Q: Explain the mechanism of the forearm flexion and extension at the elbow joint together with the…

A: Forearm flexion is the rotation of the radius and ulna anteriorly in the anatomic plane. It occurs…

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: Discuss the functions of muscle proteins (8 or more) and give an example for each.

A: Muscles belong to the category of muscular tissues that arise from mesodermal layer during 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: 1. Explain why isokinetic work is more beneficial towards the later stages of the rehabilitation…

A: Introduction :-The initial stage of rehabilitation phase lasts for 4-6 days after the injury. It is…

Q: 7. Which of the following represents the recommended exercise order during maximal strength training…

A: Strength training has various mechanics which can be explained with the help of biology Our muscles…

Q: 5. Using the hip joint reaction force example we did in class, if the moment arm for the cane is 30…

A: Our body's bones offer support for their mobility. A joint is a location where two or more bones…

Q: 18. The binding of calcium to troponin will directly cause A. the hydrolysis of ATP B. the binding…

A: Troponins are a group of proteins that are found in the skeletal and muscle fibres of the heart. It…

Q: 4. As skeletal muscle shortens with contraction, the length of the I band remains constant as the…

A: Histology is the study of the microanatomy of cells, tissues, and organs as seen through a…

Q: is the role of stored creatine phosphat

A: As we know The human body consists of various systems that function together to carry out their…

Q: 5. Which of the following exercise pairings provides an ideal and most beneficial example of a super…

A: Superset exercises have a scientific basis which can be explored through biology  Superset exercises…

Q: Which of these should exert the greatest passive force? A sarcomere at 75% of its resting length A…

A: The passive force of sarcomere is mainly dependent on the protein which is giant in nature known as…

Q: Explain what how the muscle cell maintains resting membrane potential and explain the two main parts…

A: According to our guidelines we are allowed to answer single question at a time. So if you want to…

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.