The is the basic unit of contraction. a. osteoblast c. muscle fiber b. sarcomere d. myosin filament

Q: The cross bridges of the sarcomere in skeletal muscle are made up of                 A. myelin.…

A: Introduction:-  Muscles are delicate tissue present in most animals . These contain filaments like…

Q: muscle cells are made up of? A. Z bars b. actin c. myosin d. myofibrils

A: Muscles are soft tissues found in most of the animals. Functions of muscles are to produce motion…

Q: Select one or more: - a. No tension can be generated. b. Both contractile and elastic forces…

A: Stretching helps to keep our muscles flexible, strong, and healthy, and its very much needed for…

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: Which of the following effects result(s) from aging on the muscular system? a. Muscle mass declines.…

A: The muscular system is defined as an organ system composed of skeletal muscles, smooth muscles, and…

Q: What property do all muscle tissues have in common?a. composed of collagen and elastin filamentsb.…

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

Q: Which region of the sarcomere does not change length between muscle relaxation and muscle…

A: Muscle is a kind of tissue as it is made up of group of cells. It is one of the four kind of primary…

Q: What is the first and most direct energy source for muscle con￾traction? a. glucose b. ATP c.…

A: Answer- The muscle contraction is the crutial step in the movement and locomotion.

Q: Which of the following changes in skeletal muscles is associatedwith aging?a. Muscle fibers increase…

A: Skeletal muscle is one of the three main muscle types, the two others are smooth muscle and cardiac…

Q: Stimulation of a muscle fiber by a motor neuron occurs ata. the neuromuscular junction.b. the…

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

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: Which of these increases the least as a result of muscle hypertrophy?a. number of sarcomeres d.…

A: Muscle hypertrophy means increase in the size and strength of the muscles. This in turn results in…

Q: During contraction, the bulk of calcium comes from:   A. sarcomere   B. sarcoplasm…

A: There are two questions. One question has been answered. To get the answer for the other question,…

Q: Which of the following statements about the microscopic structure of smooth muscle fibers is…

A: Muscles have a vital role in the body. Muscles do a lot for our bodies as well. They circulate blood…

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: Considering the force of contraction of a skeletal muscle fiber,wave summation occurs because ofa.…

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

Q: The function of ATP during muscle contraction is toa. cause an allosteric change in myosin so it…

A: ATP(adenosine triphosphate) causes an allosteric change on myosin so it detaches from actin and…

Q: What is released when myosin heads attach to actin filaments A. Phosphate B. ATP C. ADP D.…

A: Myosin and actin filaments are two proteins that help muscles contract. Myosin is a motor protein…

Q: The energy for muscle contraction is most directly obtained from a.phosphocreatine. b.ATP.…

A: Muscle contraction refers to the tightening of the muscles present in an organism's body to cause…

Q: This muscle type is described as interconnected, connecting as one. a. skeletal O b. visceral O c.…

A: Muscles are delicate tissues. Numerous stretchy fibers make up your muscles. Every human have more…

Q: The series-elastic component of muscle contraction is responsible for a.increased muscle shortening…

A: Muscle is a delicate tissue found in many creatures, and is one of the four fundamental creature…

Q: According to the sliding filament model, when muscles contract,a. sarcomeres shorten.b. myosin heads…

A: Answer is option e.

Q: During muscle contraction, the I band a. hides the H zone. b. shortens or narrows. c. overlaps the Z…

A: SARCOMERE It is the complicated unit of striated muscle tissue. It is the repeating unit between two…

Q: Identtidy which among the list represents the hierarchy of muscle structure from the largest unit to…

A: Muscles are connected to bones by means of tendons. They contract to produce movement and thus help…

Q: The repetitive contraction unit in muscle cells is called: Select one: O a. A Band O b. Fibril O c.…

A: There are types of muscle fibers: Skeletal muscle fibers, Smooth muscle fibers and cardiac muscle…

Q: The actual contractile units of muscle, called _____, extend from middle of one _____ to middle of…

A: Muscles are referred to as the soft tissue of the body, contraction, and relaxation of the muscle is…

Q: Muscle contractions where the muscle shortens but tension remains constant are called A. isometric…

A: Muscular system is a type of body system in which regular contraction as well as relaxation leads to…

Q: During muscle contraction, binding sites for myosin are uncovered by the movement of A. Tropomysin…

A: A. Tropomyosin   During muscle contraction, the binding sites for myosin on the actin filament are…

Q: Which of the following correctly lists the structures that make up a motor unit? a. motor neuron…

A: There are two term always used to describe the anatomical relationship between motor neurons and…

Q: Describe what is happening to the following parts of a sarcomere during muscle contraction. a. H…

A: H band or H-zone is the central region of the A zone. H zone only contains thick filaments i.e.…

Q: As ADP and Ⓟ are released from a myosin head,a. actin filaments move toward the H band.b. a…

A: During muscles contraction, energy for the movement of myosin head is obtained by the breakdown of…

Q: he factor(s) that determine the duration of a twitch in various types of fibers is the speed of the…

A: Muscle contraction is a complex biological process that involves the interaction of various…

Q: Muscles contract by the interaction of A. myofilaments  B. myofibers  C. sarcomeres  D.…

A: The muscle is a group of tissue which perform the function of movement of body. That's why muscle is…

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.