How could such multinucleated cells be explained?

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How are multinucleated cells created?

The formation and growth of multinucleated myofibers or myotubes occur through a process known as myogenesis. During myogenesis, mononucleated myoblasts withdraw from the cell cycle, initiate muscle specific gene expression, and subsequently fuse with one another to form nascent, multinucleated myofibers.

Why some cells are multinucleated?

Having two nuclei is like having two sets of blueprints, so the cells can build two proteins at the same time. The muscle cells attached to your skeleton and that help you move your body have multiple nuclei. Skeletal muscle is composed of long, fiber-like cells, which fuse together as they’re made.

How can a cell have multiple nuclei?

Explanation: Multinucleate cells may be the result of cell fusion ( eg. Skeletal muscle cells , tapetal cells in plants ) , or due to nuclear division not being followed by cytokinesis ( eg. Plasmodia of plasmodium slime moulds, schizonts of Plasmodium parasite ) .

Which organisms can have multinucleated cells?

Organisms that show multinucleate stage are fungi, e.g. coenocytic hyphae of Rhizopus, plasmodium of slime mould, skeletal muscle cells and osteoclasts in mammals are also multinucleate. Paramoecium (ciliated unicellular protozoan) contains one macronucleus and one or more micronucleus.

How are multinucleated cells explained?

Multinucleate cells (multinucleated or polynuclear cells) are eukaryotic cells that have more than one nucleus per cell, i.e., multiple nuclei share one common cytoplasm.

What type of muscle cell is multinucleated?

Skeletal muscle cells are long, cylindrical, and striated. They are multi-nucleated meaning that they have more than one nucleus.

Which is a multinucleated cell quizlet?

Skeletal muscle cells are multinucleated because they consist of several cells that have fused together. Muscle cells contain many mitochondria and the characteristic protein filaments (myosin and actin) which are responsible for the muscle contraction.

What cell division process alone could produce a multinucleated cell?

Prokaryotes have a circular DNA molecule; eukaryotes have linear DNA molecules in their nuclei. Some human cells (skeletal muscle, for example) are multinucleated and originate when uninucleated cells fuse. What cell division process alone could produce a multinucleated cell? cytokinesis plus mitosis or meiosis.

Why are fibroblast cells multinucleated?

Immortalized secondary fibroblasts formed multinucleate cells via fusion with other fibroblasts during contact co-culture with secondary-derived macrophages after 24 hours. Primary fibroblasts formed multinucleate cells in mono-culture after becoming senescent and undergoing nuclear division without cytokinesis.

What does multinucleated mean?

Definition of multinucleated

: having more than two nuclei a multinucleated macrophage multinucleated muscle fibers — compare binucleate, uninucleate.

How many nuclei can have a cell?

Take this quiz. A cell normally contains only one nucleus. Under some conditions, however, the nucleus divides but the cytoplasm does not. This produces a multinucleate cell (syncytium) such as occurs in skeletal muscle fibres.

What is the advantage of having many nuclei in skeletal muscle?

The more nuclei, the more protein can be produced, which leads to a stronger skeletal muscle. This is important because protein synthesis is essential for muscle hypertrophy, or growth, due to increased protein synthesis rates leading to increased protein deposition.

Can a cell be multinucleated?

A multinucleated cell is a unique form which is frequently observed in the normal tissue. Skeletal muscle is composed of bundles of multinucleate muscle fibers [1].

Why are skeletal muscles often called voluntary muscles?

Voluntary muscles are those muscles which are controlled by the will of an individual i.e. controlled by the individual’s brain. The person can take decision on the movement of the muscle. Hence the movement of the skeletal muscle is decided by our own will hence being a voluntary muscle.

Which of the following is not a feature of skeletal muscle?

So, the correct answer is ‘Production of body heat.

What is the nucleolus function?

Significance. The nucleolus is an organelle in the nucleus that plays a key role in the transcription and processing of ribosomal RNA (rRNA).

What is the function of myocytes?

The muscle myocyte is a cell that has differentiated for the specialized function of contraction. Although cardiac, skeletal, and smooth muscle cells share much common functionality, they do not all share identical features, anatomical structures, or mechanisms of contraction.

How might diploid individuals be created to complete the life cycle?

What is the most likely mechanism by which diploid individuals could be created to complete the life cycle? Some of these individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote.

What is Epimysium and what is its function?

Epimysium (plural epimysia) (Greek epi- for on, upon, or above + Greek mys for muscle) is the fibrous tissue envelope that surrounds skeletal muscle. It is a layer of dense irregular connective tissue which ensheaths the entire muscle and protects muscles from friction against other muscles and bones.

Which of the following muscle cells are striated multinucleated and neurogenic?

-The human body consists of three types of muscles: skeletal muscle, smooth muscle, and cardiac muscle. -Smooth muscles are the non-striated, uninucleated, and are present in the linings of the organs of the body. –Cardiac muscles are the heart muscles, which are striated, branched, and multinucleated.

Are cardiac muscles multinucleated?

The cells, however, are not multinucleated and are not true syncytium (as seen in case of skeletal muscle) but functionally they are syncytium (multinucleated). Therefore, cardiac muscle is functionally multinucleated and skeletal (voluntary) muscle are true multinucleated. So, the correct option is ‘Cardiac muscle’.

Which of the following processes must occur before cell division begins?

Before a cell can enter the active phases of mitosis, however, it must go through a period known as interphase, during which it grows and produces the various proteins necessary for division.

Which mediator contributes to giant cell formation?

Recent studies involving mainly osteoclasts and foreign body giant cells have revealed a number of common factors, e.g., vitronectin, an adhesion protein, dendritic cell-specific transmembrane protein (DC-STAMP), a fusion factor, and macrophage fusion receptor (MFR), that contribute to giant cell formation and function …

Is smooth tissue multinucleated?

Skeletal muscle cells are multinucleated from the fusion of muscle cells. Smooth muscle cells are strictly mononucleated, and cardiac muscle cells are mononucleated in humans.

What muscle tissue has branching cells?

Cardiac muscle tissue is striated like skeletal muscle, containing contractile units called sarcomeres in highly regular arrangements of bundles. While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles known as intercalated discs.

Which type of muscle is multinucleated and striated?

Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control.

Why is nucleus important for a cell?

The nucleus is one of the most obvious parts of the cell when you look at a picture of the cell. It’s in the middle of the cell, and the nucleus contains all of the cell’s chromosomes, which encode the genetic material. So this is really an important part of the cell to protect.

How does the structure of the nucleus help it function?

The cell nucleus​ is a membrane-bound structure that contains the cell’s hereditary information and controls the cell’s growth and reproduction. It is the command center of a eukaryotic cell and is commonly the most prominent organelle in a cell accounting for about 10 percent of the cell’s volume.

What are the benefits of being multinucleated?

The advantage of skeletal muscle being mutinucleated is that it can control the long bones efficiently also when we do any normal task or while doing exercises or sometimes exertion , skeletal muscle participate in it and hence it requires energy somewhere in large amount so the presence of many nuclei assures the …

Which human cells do not possess nucleus and which cells are multinucleated?

Interestingly, some cells in the body, such as muscle cells, contain more than one nucleus (Figure 3.20), which is known as multinucleated. Other cells, such as mammalian red blood cells (RBCs), do not contain nuclei at all.

How does the nucleus control the cell?

The nucleus directs all cellular activities by controlling the synthesis of proteins. The nucleus contains encoded instructions for the synthesis of proteins in a helical molecule called deoxyribonucleic acid (DNA). The cell’s DNA is packaged within the nucleus in a structural form called chromatin.

What is the advantage of having so many nuclei in such a large cell?

Nuclei help in producing large amounts of muscle proteins, which help in the growth and repair of muscles.

How do skeletal muscles work voluntarily?

Voluntary muscles are the skeletal muscles of the body that attach to bones and control movement of the limbs, head, neck, and body under conscious control. Skeletal muscles are controlled by neuromuscular signals from the brain that communicate with individual muscle fibers and cause them to contract.

Why are voluntary and involuntary muscle tissues function?

Answer. voluntary are our striated/striped/skeletal muscles these are those mucles which depend on the will power of human body and involuntary are not depends on the will power as they generate their own impulse or excitation and these muscles are cardiac and smooth muscles……..

How do voluntary and involuntary muscles differ?

Definition of voluntary muscle: Voluntary muscles are the ones that move or contract under the conscious control of a person. Definition of involuntary muscle: Involuntary muscles are the ones that do not move or contract under the conscious control of a person, i.e., these muscles work automatically.

Does the skeletal system produce blood cells?

Blood cells are made in the bone marrow. The bone marrow is the soft, spongy material in the center of the bones. It produces about 95% of the body’s blood cells. Most of the adult body’s bone marrow is in the pelvic bones, breast bone, and the bones of the spine.

What do human cells need to grow and reproduce Milady?

histology	microscopic anatomy
mitosis	usual process of cell reproduction in human tissues. occurs when 2 cells divide into 2 identical daughter cells.
list favorable conditions for cells to grow and reproduce.	food, oxygen, water; and suitable temperatures and the ability to eliminate waste products.

What makes skeletal muscle unique?

Unlike smooth muscle and cardiac muscle, skeletal muscle is under voluntary control. Similar to cardiac muscle, however, skeletal muscle is striated; its long, thin, multinucleated fibres are crossed with a regular pattern of fine red and white lines, giving the muscle a distinctive appearance.

What is the purpose of the nucleolus in eukaryotic cells?

The nucleolus is a region found within the cell nucleus that is concerned with producing and assembling the cell’s ribosomes. Following assembly, ribosomes are transported to the cell cytoplasm where they serve as the sites for protein synthesis.

What is plasma membrane function?

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

What causes myocytes to contract?

Chemical and physical interactions between the actin and myosin cause the sarcomere length to shorten, and therefore the myocyte to contract during the process of excitation-contraction coupling. The interactions between actin and myosin serve as the basis for the sliding filament theory of muscle contraction.

How do myocytes form?

Muscle cell differentiation begins with the conversion of mesodermal precursor cells into single-cell myoblasts, which then fuse to form myocytes. Further fusion of the myocytes produces multinucleate myotubes.

What do myocytes consist of?

Myocytes contain one or two nuclei that are centrally located and oblong. Myofibrils course around the nucleus, leaving at the nuclear poles a conical area free of contractile elements but densely packed with other cellular organelles.

What is the purpose of the endomysium perimysium and epimysium?

Endomysium combines with perimysium and epimysium to create the collagen fibers of tendons, providing the tissue connection between muscles and bones by indirect attachment.

Why is the perimysium important?

Perimysium is a sheath of connective tissue that groups muscle fibers into bundles (anywhere between 10 and 100 or more) or fascicles. Studies of muscle physiology suggest that the perimysium plays a role in transmitting lateral contractile movements.

What is the epimysium quizlet?

epimysium. connective tissue sheath that surrounds the entire muscle.

Why are some cells multinucleated?

Furthermore, multinucleate cells are produced from specialized cell cycles in which nuclear division occurs without cytokinesis, thus leading to large coenocytes or plasmodia.

Which of the following is an example of multinucleated cell?

Thus, the correct answer is ‘Striated muscle.

What is Multinucleated cell?

A multinucleated cell is a unique form which is frequently observed in the normal tissue. Skeletal muscle is composed of bundles of multinucleate muscle fibers [1]. Osteoclasts induce multinucleation by the cell fusion of mononuclear cells to cover a large area for bone resorption [2].

Which process produces diploid cells?

The process that produces diploid somatic cells is mitosis. Mitosis is a form of cell division that occurs in somatic cells, which are cells of the…

Which event leads to diploid cell in a life cycle?

The haploid cell may divide mitotically to produce an organism, some of whose cells will combine during fertilization, or the haploid cells produced by meiosis may immediately combine in fertilization to produce a diploid cell that divides to produce an organism.

What cell division process alone could produce a Multinucleated cell?

Prokaryotes have a circular DNA molecule; eukaryotes have linear DNA molecules in their nuclei. Some human cells (skeletal muscle, for example) are multinucleated and originate when uninucleated cells fuse. What cell division process alone could produce a multinucleated cell? cytokinesis plus mitosis or meiosis.

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