Q: Define intermediate filaments
A: All eukaryotic organisms cell consists of cytoskeleton , which is a cross cross network of…
Q: Skeletal muscle cell(key terms: striated, contracting proteins, contractions, nucleus location) One…
A: muscles are the tissues which helps in movement and locomotion . they contract and relax based on…
Q: Which muscle type has the most elaborate connective tissue wrappings? Please explain. What do…
A: Muscles cells make up the muscle tissue.
Q: Which component is responsible for initially stimulating a muscle contraction? a. proteins b.…
A: Muscle contraction can be defined as the increase in the tension or decrease in the length of a…
Q: The correct order for the smallest to the largest unit oforganization in muscle tissue is…
A: Muscle tissues represent the soft tissues present in the many animals. Muscle tissues are composed…
Q: Among the following which one is NOT the location of smooth muscle cells?
A: As the name suggests, smooth muscle cells do not any striations. They are narrow spindle shaped…
Q: A thick filament is made up of Select one: a. myosin and regulatory filaments b. actin and…
A: Muscular contraction is caused by the interaction between actin and myosin as they temporarily bind…
Q: Which of the muscle tissues above is characterized by the following • No striations in cytoplasm •1…
A: Muscle tissue is characterized by properties that allow motion. They are excitable and they respond…
Q: Illustrate/Draw the differences among striated or skeletal muscle, smooth muscle and cardiac muscle.
A: Our body is made up of number of soft tissues called the muscles. Muscle cells are made up of…
Q: Define each of the following terms: concentric isotonic contraction, eccentric isotonic contraction,…
A: Actin and myosin cross bridge cycling generates tension in the muscle fibre. This causes the muscles…
Q: Skeletal muscle cell(key terms: striated, contracting proteins, contractions, nucleus location) This…
A: Skeletal muscle cells are the cells that help us move and are compartmentalized in the body into…
Q: Explain why skeletal muscle cells contain many mitochondria.
A: Mitochondria is a cell organelle found in the cytoplasm eukaryotic cell. It is a double…
Q: What is the importance of ATP in dissociating actin and myosin?
A: Animal physiology is the systematic study of the supporting features, roles, and processes of…
Q: Explain the differences between isometric and isotonic contractions.
A: Answer: Introduction: Isotonic contraction (iso=equal; tonic= tension), means the tension produced…
Q: Which region or organelle—cytosol, mitochondrion, or SR—contains the highest concentration of…
A: In a resting skeletal muscle cell, low amounts of calcium ions are present in the cytosol. The…
Q: Muscle cells have a number of anchor membrane?
A: A muscle cell is characterized by a long cell that can shorten its length through a sequence of…
Q: Why would cardiac muscle cells and some smooth muscle cells.continue to contract even when their…
A: Human body has more than 600 muscles which perform many useful functions and help us in doing…
Q: Identify three microscopic components of muscle cells notfound in other types of cells.
A: Myocytes or muscle cells are the cells that constitute muscle tissue. Muscle tissues are responsible…
Q: I= band at the time of relaxation H= zone at the time of relaxation Sacomere at the time of…
A: During the muscle cell contraction, the sarcomere must shorten. However, thick and thin filaments…
Q: Discuss the similarity between cardiac and smooth muscle cells?
A: Cardiac: the muscle tissue that makes up the myocardium, or thick middle layer of the hearsomes.Its…
Q: Discuss the difference between thick and thin filaments ?
A: Thick and thin filaments are important part of the sarcomere which is the unit of muscle…
Q: Why does Skeletal muscle cells contain more mitochondria than other organelles?
A: A skeletal muscle cell is a multinucleate syncytium that forms by the fusion of hundreds of myoblast…
Q: Muscle with a reduced blood supply and low numbers of mitochondria is likely Fast, with strong…
A: Muscles These are soft tissues that help us in running, jumping, support, heat generation, and blood…
Q: Skeletal Muscle Smooth Muscle Cardiac Muscle Striated? [a] [b] [c] [f] # of Cells? [d] [e] Shape?…
A: Tissue comprises of structurally and functionally similar cells. It is a level of organization in…
Q: What are multi-unit smooth muscle cells?
A: Smooth muscles are non-striated and present in the posterior part of the esophagus, stomach,…
Q: Thin and thick filament are organized into functional unit called
A: The skeletal muscles are formed by the skeletal muscle tissues. These tissues have a striated…
Q: Explain how the contractile filaments are structured
A: A muscle fiber is a contractile filament which is made of contractile proteins. The thick…
Q: A muscle cell contains a single nucleus and does not contain any striations. Which of the following…
A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and…
Q: Describe similarities and differences in the three types of muscle cells.
A: A muscle is a tissue that performs different functions which causes movement to take place. The…
Q: A muscle is attempting to avoid being eaten by a starfish by tightly closing its shell. Is this an…
A: Introduction Muscle tone is the amount of tension in the skeletal muscles at rest, and it helps to…
Q: One consequence of oxygen deprivation is decreased production of ATP. Would you expect this to have…
A: Oxygen deprivation results in the low production of energy molecules. Low oxygen supply can affect a…
Q: Label all the visible parts of the following skeletal and smooth muscle.
A: *skeletal muscles are about 30 to 40% of total body mass. *These muscles connects to bones and hence…
Q: Which of the following commits a cell to become muscle cell?
A:
Q: The smooth muscle tissue is consists of long muscle fibers Called visceral muscle Its cells have…
A: Muscles are the soft tissues that produce force and motion in animals. They are made up of protein…
Q: Why is it important that skeletal muscle tissues work voluntarily and smooth and cardiac muscle…
A: Skeletal muscle tissues are the tissues are made up of cells that are striated. They are under our…
Q: Differentiate between isovolumetric contraction phase and isovolumetric relaxation phase
A: A cardiac cycle includes all the events within the heart from the start of one heartbeat to the…
Q: Involuntary muscle consisting of spindly shaped cells without striations is called: cardiac muscle.…
A: Involuntary muscles are those that do not move or contract under a person's conscious control, i.e.,…
Q: Describe the functions of the smooth endoplasmic reticulumin hepatocytes and muscle cells.
A: Endoplasmic reticulum is a continuous membrane system that forms a series of flattened sacs within…
Q: Striations are found in the cytoplasm of which type(s) of muscle tissue? Select all that apply.…
A: Muscle tissue- This tissue is a crucial part of any movement that the body comprises via…
Q: Describe the three types of muscle tissue, and give a location and function of each.
A: The three types of muscle tissue are skeletal muscle tissue, cardiac muscle tissue and smooth muscle…
Q: When ATP binds, what prevents the filaments from sliding back into their original positions?
A: Adenosine triphosphate (ATP) are energy rich currencies of life that stores and supplies energy to…
Q: Skeletal muscle cell(key terms: striated, contracting proteins, contractions, nucleus location) The…
A: Muscles are tissues which helps in locomotion and movement. They contract and relax to bring about…
Q: Give the common name of each connective tissue fiber: a. Collagen Fibers b. Elastic Fibers c.…
A: Fibrous tissue that differs mostly in density and cellularity makes up connective tissues. Bone,…
Q: Cofilin depolymerizes older actin filaments since it prefers to.. . bind to GTP-containing actin…
A: Cofilin is a fundamental actin administrative protein that constitutively cuts off actin filaments,…
Q: What causes increases rate of contraction?
A: The heart and blood vessels are the main organs of the cardiovascular system. The heart, which is…
Q: Intermediate filaments are composed of?
A: Intermediate filaments are a fundamental component of the cytoskeleton, but they are not present in…
Q: Explain the concept of the following in regard to muscle cells: power stroke does not need to be a…
A: The process of muscle contraction is initiated when calcium ions bind to troponin protein complex.…
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- Which of the following is true of cardiac muscle? о а. Cardiac cells are electrically connected via intercalated disks o b. All of these statements are true It is the only type of tissue that produces spontaneous action potentials o d. It is made of multinucleate cells It lacks sarcoplasmic reticulum Ос. Ое.A person eats a plan that is an agonist to adrenergic receptors on contractile myocardial cells. Which of the following is NOT likely to happen if the adrenergic receptors on this persons conctractile myocardial cells get blocked. Contractile myocardial cells will depolarize more slowly slower uptake od Ca2+ by Ca2+ ATPase from sarcomeres less Ca2+ released from sarcoplasmic reticula following action potentials voltage gated Ca2+ channels get held open longerHow would a decrease in the concentration of iron in the blood affect the process of hemostasis? Select one: a. There would be no effect O b. Clotting would proceed more slowly Oc. Clotting would proceed more rapidly O d. Fibrinogen would not be formed On a myelinated axon, action potential generates on: Select one: a. the nodes of Ranvier O b. synaptiC vesidles C. synaptic bulbs O d. the myelin sheets The portion of a nerve cell which contains the nucleus and most of the metabolic machinery is called the: Select one: O a. Cell body O b. Synapse Oc Dendrites O d. Axon 9:21 PM A O 4) a ENG 20-Apr-2021
- In which type(s) of muscle cells does each cell have its own neuromuscular junction? skeletal only unitary smooth and skeletal skeletal and cardiac 2. The follow is NOT true of CARDIAC muscle fibers: - connected by gap junctions - include pacemaker cells that can produce produce action potentials at regular intervals without innervation - without calcium cross bridge cycles will not occur and fibers will not shorten - each cell in a motor unit has a neuromuscular junction with the same motor neuron actin and myosin filaments are arranged in sarcomeres produce greater force when stretched than at resting length 3. Match the following: -Skeletal muscle -Cardiac muscle -Smooth muscle Can maintain prolonged isometric contractions with very little energy Striated muscle fibers with gap…During the late phases (plateau) of the action potential of fast myocardium (e.g. ventricle) which is not true of the sodium channel? OA. Defects in inactivation can prolong the action potential and lead to long QT syndrome. OB. It is refractory. OC.A slower inactivation gate keeps the channel shut in response to sustained depolarization. OD. It fires transiently early on in the action potential and is not active during the late plateau. O E. All are true.Which of the following is unique to cardiac musclecells?a. Only cardiac muscle contains a sarcoplasmicreticulum.b. Only cardiac muscle has gap junctions.c. Only cardiac muscle is capable ofautorhythmicityd. Only cardiac muscle has a high concentration ofmitochondria.
- Cardiac muscle cells produce more force when they have already shortened to less A than half of their resting length when they are stimulated more calcium is released into the fluid B around their actin and myosin filaments they are stimulated to contract before C their refractory period has ended more acetylcholine is released from D nearby neuronsWhich statement about activation of heart muscle cells is TRUE? A when a person is resting only a few small motor units in each ventricle are activated in each heartbeat B all of the muscle cells in the ventricles depolarize and contract together because they are connected by gap junctions C motor neurons must synapse with all of the muscle cells in the ventricles at the same time or fibrillation will occur D all of the heart muscle cells have unstable resting membrane potenitals and slowly depolarize to threshold at the same rateDuring the systolic phase of the cardiac cycle, the bean is _______. a. contracting b. relaxing c. contracting and relaxing d. filling with blood
- Which of these conditions occurs in the repolarization phase of an action potential in pacemaker cells? A voltage-gated Ca2+ ion channels are open B voltage-gated K+ ion channels are open C voltage-gated Na+ ion channels are open D all of theseA heart microslide demonstrates cells in the shape of pale chords, which have few myofibrilla, glycogen inclusions and eccentric nuclei. Name these cells: Endocrine cells Contractile cells Leading pacemaker cells O Purkinje's fibers O Leading transitional cellsThe plasma membranes of adjacent cardiac muscle cells are connected via ____________, in which ____________ tie the cells together and ____________allow current (ions) to flow from one cell to the next (electrical coupling).
