Q: List the events occur at the neuromuscular junction.
A: Introduction The NMJ or the neuromuscular Junction is the site of synaptic connection between the…
Q: Light less dense area of sarcomere that contains reminder of thin filaments but no thick filaments…
A: SARCOMERE It is the complicated unit of striated muscle tissue. It is the repeating unit between two…
Q: Match Column I with Column II :Column I Column II(a) Smooth muscle…
A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…
Q: Define intermediate filaments
A: All eukaryotic organisms cell consists of cytoskeleton , which is a cross cross network of…
Q: Bank: A. Contraction C. Relaxation B. Myosin filament D. Actin filament C. Endocrine E. Contact…
A: A group of cells that have similar structure and that function together as a unit are known as the…
Q: Why is it logical that there are no muscle fibers classified asslow-glycolytic?
A: There are 3 types of muscle Fibres. Type I= slow oxidative Type II=fast oxidative Type III=fast…
Q: What would happen if ATP suddenly were not available after the sarcomere had started to shorten?
A: The muscular framework is an organ framework comprising of skeletal, smooth and cardiac muscles. It…
Q: Myosin heads bend when attached to actin
A: Correct option is C Myosin heads bend when attached to actin
Q: Calcium ion Troponin Actin Magnesium
A: Answer D -magnesium is answer as it blocks the action of calcium in muscle which is needed for…
Q: Each sarcomere contains two sets of thin filaments. What are they? What is their function?
A: The soft tissue-like structure found in the majority of the animals including human beings is known…
Q: Define activa-tion loop,
A: Activation lupus typically 20 to 30 residues in length beginning with conserved DFG Motif (usually…
Q: List five proteins of the myofilaments
A: We know that Muscles are the soft tissue found in our body. Muscles work to create strength and…
Q: Why is Excitation Contraction Coupling important?
A: Muscles contraction The contraction of muscle activated by the tension generating sites present in…
Q: Type of muscle: Structure B:
A: Ans. The figure represents the structure of the cardiac muscle. Muscle is an organ made up of muscle…
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: Table1.Contractionofsmoothmusclebythreeagonists Contractileresponse(mm) Log[agonist] (M) -10 -9 -8.5…
A: Here, contraction of smooth muscle using increasing concentration of three agonists is given. The…
Q: In a myofibril, the light central region of an A band is called... O I band O M line O Z band O H…
A: In a myofibril, the light central region of an A band is called H zone.
Q: Identify the structure highlighted in green: 三三園 Sarcolemma Myofibril Sarcoplasm
A: The image given is of excitation-contraction coupling mechanism in skeletal muscle.
Q: Structures of monomeric G-actin and F-actin fila-ments.
A: Actin and myosin are the filaments that constitute the myofibrils that in bundles form the muscle…
Q: Thick myofilaments consist mainly of the protein _____.
A: Thick myofilaments consist mainly of the protein called Myosin.
Q: Briefly explain ultrastructrure of myofibril.
A: The human skeletal muscles are made up of many muscle bundles or fascicles. Different muscle bundles…
Q: what is a myofibril
A: To describe: To describe myofibril and its structure.
Q: Motor neuron 4 Muscle fiber nucleus Myofibril of muscle fiber Figure 10.15. Details of the…
A: A neuromuscular junction is the region of chemical interaction between the axon terminal of neurons…
Q: Explain myosin regulatory lightchain
A: When a cell is destined for division, first its nuclear content would be shared between cells. It…
Q: What do you mean by myofibrils?
A: Muscle cells are also referred to as myocytes. These are the cells that made up the muscle tissue.…
Q: Define neuromuscular junction
A: The transfer of electrical impulses from the presynaptic membrane to the postsynaptic membrane via…
Q: Microfilaments and intermediate filaments are different in that only
A: Microfilaments ,intermediate filaments,microtubules form cytoskeleton of a cell. Microfilaments,…
Q: the structures in the image below. Complete the table to describe the basic structure of a skeletal…
A: A Tendon: tendon is a fibrous connective tissue which attaches muscle to bone. B Epimysium: is the…
Q: Follow the events of excitation-contraction coupling that lead to cross bridge activity.
A: The sequence of events that result in the contraction of an individual muscle fibre begins with a…
Q: Mechanism of action of depolarizing and nondepolarizing Neuromuscular Blockers (NMBs)
A: Introduction: Depolarizing and nondepolarizing Neuromuscular Blockers cause muscle relaxation.…
Q: State the function of myofibrils.
A: Muscle is a soft tissue observed in maximum animals. The characteristic of muscle is to provide…
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: Sarcomere lies between O two I band O two Z line O M lineand Z line O two M line *
A: Muscular system is a part of body system which is involved in regular contraction as well relaxation…
Q: why would skeletal muscle cell need so many nuclei?
A: Skeletal muscle is a striated muscle and it usually does not contract unless stimulated by the…
Q: Skeletal muscle tissue;Location _______________________ Function ______________________
A: Muscles are one of the four main types of tissues found in the human body.
Q: State some major differences between actin filaments and myosin filaments.
A: A long chain of protein like those in muscle and hair is called protein filaments. They are…
Q: labeled M is the muscle. A
A:
Q: Thin and thick filaments are organized into functionalunits called ________.a. myofibrilsb.…
A: Myofibrils are made up of myofilaments. These myofilaments are myosin and actin. T-tubules are the…
Q: Which of the following is required for contraction of myofibrils? Select one: a. bicarbonate ions b.…
A: Introduction:- Myofibrils are relatively small contractile fibres that run in parallel columns along…
Q: Mutations in myosin
A: myosin is a motor protein most notably involved in muscle contraction. Small genetic mutations in…
Q: Rate/force of muscle contraction
A: Muscle contraction is an increase in tension or decrease in muscle length which occurs during…
Q: Actin exits in two forms, a globular G form ( the free subunit) and a filamentous Fform( assembled…
A: Answer: ACTIN = This is a protein that forms microfilaments and are present in all eukaryotic cells,…
Q: ce: 63. Sección Largest 64. 65. 66. 67. Smallest A. Calcium В. Мyofibril . Myofilament ||||
A: Skeletal, smooth, and cardiac muscles is usually define as the way the they are supposed to make up…
Q: The A-band includes overlapping myosin fibers only both actin and myosin fibers actin, troponin and…
A: Muscle contraction Actin and myosin are proteins that are found in the muscles, which work together…
Q: How would muscle contraction be affected if a chemical was added to myofibrils that inactivated…
A: Introduction The sarcoplasmic reticulum (SR), which is comparable to the smooth endoplasmic…
Q: f actin filaments such that it prevents myosin II
A: Answer: Filamin: The filamins (FLN) are a family of actin binding proteins that can convert, via…
Q: List five proteins of the myofilaments and describe their physical arrangement.
A: In muscle cells, myofilaments are the three protein filaments of myofibrils.
Q: Calcium is released from the sarcoplasmic reticulum following death. Without available ATP, rigor…
A: Muscles are required in breathing, talking, running, walking, and anybody's movement. Actin and…
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- Which of the following are differences between the assembly processes of intermediate filaments versus that of actin microfilaments? A. New subunits are added internally to the intermediate filament rather than at the ends B. Assembly requires GTP rather than ATP C. Intermediate filaments are assembled from multiple tetramers rather than from monomers. D. A and B E. A and CWhich of the following statements are true for both actin and tubulin: a. Both actin and tubulin filaments are hollow. b. Both actin and tubulin are structural proteins capable to form filaments that can grow from both (+) and (-) ends. c. Both actin and tubulin require GTP for polymerization into filaments. d. Both actin and tubulin require ATP for polymerization into filaments.The strength of collagen comes from which of the following? a. hydrophobic interactions and hydrogen bonds b. crosslinking via peptide bonds c. β sheets d. crosslinking as a result of disulfide bonds
- Which of the following best describes collagen? Select the correct responses): It is a sinistral super helix that is formed from three sinistral helices. It is a sinistral super helix that is formed from three dextral helices. • It is primarily made up of chiral and cyclic amino acids. It is primarily made up of chiral and acyclic amino acids. It is a dextral super helix that is formed from three sinistral helices. • It is primarily made up of achiral and cyclic amino acids. ]It is primarily made up of achiral and acyclic amino acids. • It is a dextral super helix that is formed from three dextral helices.Protein is essential to the building block of muscles. Muscle protein synthesis is a naturally occurring process in which protein is produced to repair muscle damage caused by intense exercise. It is an opposing force to muscle protein breakdown (MPB) in which protein is lost as a result of exercise. (Source: https://www.encyclopedia.com/sports/sports-fitness-recreation-and-leisuremagazines/muscle-protein-synthesis). For example, you are an athlete, and you want to maintain the strength and mass of your muscles. 1. How important is protein synthesis in your body?2. How are you going to boost the protein synthesis in your body? How are you going to boost the amount of essential amino acids and proteins in your body?Which of the following proteins plays a important role in the geometry of sarcomere and in sarcomerogenesis? GAPDH Colligen Titin Utropitin urease
- Intermediate filaments (IFs) function to provide mechanical strength to the cell and for internal organization of the cells. The intermediate filament _______________ plays a key role in connecting epithelial cells to the extracellular matrix. The IF binding protein________ plays key role in connecting the IFs in the nucleus with the cytoskeleton in the cytoplasm to help position the nucleus. keratin, SUN-domain protein SUN-domain proteins, lamin lamin, keratin SUN-domain proteins, keratin lamin, SUN-domain protein keratin, laminIf you were to watch muscle tissue contract: Under a light microscope, would you see the muscle fibers get narrower, or the striations get thinner? Explain. At the EM level, focusing on one sarcomere, you would be able to see a region of thick filaments overlapping two regions of thin filaments. Use the structure of the thick filaments to explain how ONE region of thick filaments is able to pull in microfilament in two opposite directions (both toward the center of the sarcomere).What is one feature of fibrillar collagen that contributes to its strength? They form crosslinks between glycine and alanine residues on adjacent collagens. They form crosslinks between lysine and hydroxylysine residues on one collagen molecule. They form crosslinks between glycine and alanine residues on one collagen molecule. They form crosslinks between lysine and hydroxylysine residues on adjacent collagen molecules.
- Explain how the structure of intermediate filaments makes them better suited to provide mechanical strength than either microtubules or actin filaments.?What is NOT a type of intermediate filament? keratin nuclear lamin dynein neurofilament vimentinWhich of the following is NOT an intermediate filament? A. keratin B. titan C. nuclear lamin D. vimentin
