What is the basic functional unit of a myofibril? a. endomysium b. sarcomere c. muscle fiber d. gap junction

Q: What is the role of ATP in muscle function? a. ATP provides energy that enables myosin to form cross…

A: ATP stands for adenosine triphosphate. It is an energy coin of the cell. It is produced in the…

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 unit of muscle structure that is composed of bundles ofmyofibrils, enclosed within a sarcolemma,…

A: Muscle cells or muscles fibres forms the muscle tissue. The muscle tissue together forms a muscle…

Q: (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to…

A: NOTE:- "As you have posted two parts under one, we will solve the first part for you, to get the…

Q: Which of the following describes the addition of muscle fibers to take part in a contraction? a.…

A: The muscle tissue present in the human body is primarily responsible for the movement in the body.…

Q: Using what you know about the functional units of muscle, describe the structure of a muscle fiber.…

A: The muscle important function is Contractibility. Muscles, attached to bones or inner organs and…

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: What are the three functional types of proteins found in a myofibril?

A: A muscle fiber is made of many Myofibril and myofibrils are made of many myofilaments. Myofibrils…

Q: In the numbered list below, what are they in order from largest to smallest? 1. Myofilaments 2.…

A: Tissue is the next level organization of the cells. There are 4 different types of tissue are…

Q: In a skeletal muscle fiber, a triad is composed ofa. myosin, actin, and myofibrils.b. one A band,…

A: Skeletal muscle tissue produces skeletal muscles that bind and regulate motility to bones or skin…

Q: Botulism toxin inhibits the release of acetylcholine at the neuromuscular junctions. What effect…

A: Neurons are the basic structural and functional unit of the nervous system. Neurons have three…

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: (a) What are myofibrils? (b) Which components of the sarcoplasm separate the myofibrils in a fiber…

A: The three muscle types in the human body are skeletal, smooth, and cardiac muscle. Skeletal muscles…

Q: The plasma membrane of a skeletal muscle fiber is called thea. sarcoplasmic reticulum.b.…

A: Skeletal muscles are involved in movement. Contraction of skeletal muscles makes movement possible.…

Q: Calcium ions are responsible for unmasking of active site on which protein for cross bridge activity…

A: The muscle fibers contain sarcomeres that are the structural units responsible for muscle…

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: Which cell type helps to repair injured muscle fibers?a. ganglion cellsb. myotube cellsc. myoblast…

A: Muscle fibers, or muscle cells, are formed when the developmental myoblasts fuses together, this…

Q: What type of muscle performs an anchoring function by holding a bone in place? a. antagonist b.…

A: There are various ways in which a muscle is involved in an action. They are namely Agonist,…

Q: Sketch a sarcomere, and describe the function of the major proteins involved in muscle contraction.

A:

Q: What type of motor neuron stimulates skeletal muscle fibers to contract by the…

A: Electrochemical action in skeletal muscle fibers causes myofilament movement. Excitation-contraction…

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

A: Answer is option e.

Q: On a microscopic scale, explain how muscle fibers move in order to make a muscle shorter? Explain…

A: The cellular respiration provides energy (ATP) for the muscle contraction and The nervous system…

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: What would happen if a muscle fiber suddenly ran out of ATP when sarcomeres had only partially…

A: The skeletal muscle's contractile unit that comprises of the thin actin and thick myosin as the…

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: Myosin binds to actin, then bends. What is ATP needed for next? A. to pump the Ca++ “keys” back into…

A: D option is the correct statement.

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: From which embryonic cell type does muscle tissuedevelop?a. ganglion cellsb. myotube cellsc.…

A: Muscle tissues are the animal tissues derived from the mesodermal layer of the embryonic germ cells…

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: O a. presence of gap junctions O b. regular arrangement of highly organized thi- O c. presence of…

A: One of the four primary types of tissue is formed by the muscle. In human body, muscular system is…

Q: How does the structure of the microfilaments allow for linear contraction of a whole muscle cells?

A: Microfilaments are little, string like protein fibres with a diameter of 3-6 nm. They are mostly…

Q: How could you tell how many cells fused to form a muscle fiber?

A: Muscle fibers are formed from the fusion of myoblasts by the process of myogenesis. They are…

Q: Weight training increases muscle fiber size by increasing the number of myofibrils. Explain

A: Muscles are the organs of the body’s muscular system and there are three distinct types of muscles…

Q: What causes relaxation in a skeletal muscle fiber Select one: a. Myosin remains attached to actin b.…

A: Each skeletal muscle is an organ that consists of various integrated tissues. These tissues include…

Q: Explain how the filaments of a myofibril interact during muscle contraction.

A: Myofibrils are very small contractile fibres that run in parallel columns along the length of…

Q: Which of the following is a microscopic feature of a skeletal muscle fiber? a. It contains multiple…

A: Skeletal muscle is found tethered to bones. It has fibers with many nuclei. Skeletal muscles are…