Smooth muscle has no striations, is not under voluntary control, has only one nucleus per cell, is tapered at both ends, and is called involuntary muscle. … It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks.
Is smooth muscle involuntary or voluntary? are skeletal muscles voluntary or involuntary.

Is smooth muscle Multinucleated or Uninucleate?

Smooth muscles are located in the walls of hollow internal organs and exhibit involuntary contraction. Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle.

Are all muscle cells branched?

Explanation: There are many cells present in our body and some of the cells are branched but muscle cells is not one of them they form a Framework for our body. Instead of being branches there are basically spindle shaped, the Nerve cells on the other hand are the ones that are branched in our body.

What muscles are branched?

Like skeletal muscle, cardiac muscle is striated, but unlike skeletal muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle. It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks.

Is smooth muscle tissue Multinucleated?

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

Why are smooth muscle cells shaped the way they are?

Smooth muscle cytoplasm contains large amounts of actin and myosin. Actin and myosin act as the main proteins involved in muscle contraction. Actin filaments attach to dense bodies spread throughout the cell. … The shape of smooth muscle is fusiform, which is round in the center and tapering at each end.

Why are smooth muscle cells spindle shaped?

The spindle shape of the mononucleated smooth muscle cell permits a close contact among cells in the splanchnic and vascular walls. … The space between the different macular connexons is about 2 nm, which allows low-molecular compounds to pass from one cell to another.

Are skeletal muscles branched?

Four characteristics define skeletal muscle tissue cells: they are voluntary, striated, not branched, and multinucleated. … These stripes are caused by the regular arrangement of actin and myosin proteins within the cells into structures known as myofibrils.

Do smooth muscle cells have branches?

Smooth muscle cells are a lot smaller than cardiac muscle cells, and they do not branch or connect end to end the way cardiac cells do.

Are muscle fibers branched or unbranched?

Muscle tissues. Cardiac Muscle – Note the branched nature of the cells and the intercalated discs that provide electrical connections between cells. Skeletal muscle – These fibers are unbranched and lack the intercalated discs found in cardiac muscle and are therefore not electrically connected.

What is the shape of smooth muscle cell?

Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations.

Are smooth muscle cells Mononucleated?

Smooth muscle is found in the walls of internal organs, such as the organs of the digestive tract, blood vessels, and others. It consists of mononucleate fibers with tapered edges. No striations are visible in smooth muscle under the microscope.

What is the structure of the muscle tissue?

The muscular tissues are bundled together and surrounded by a tough connective tissue similar to cartilage known as epimysium. The bundle of nerve cells that run in long fibers called fascicles are surrounded by the epimysium. The fascicles are surrounded by a protective layer known as perimysium.

What is the structure of the muscle cell?

As seen in the image below, a muscle cell is a compact bundle of many myofibrils. Each myofibril is made of many sarcomeres bundled together and attached end-to-end. A specialized form of the endoplasmic reticulum, known as the sarcoplasmic reticulum, extends in and around these myofibril bundles.

How does the structure of smooth muscle tissue relate to its function?

Each type of muscle tissue in the human body has a unique structure and a specific role. Skeletal muscle moves bones and other structures. … The smooth muscle tissue that forms organs like the stomach and bladder changes shape to facilitate bodily functions.

Does smooth muscle have cell membrane?

Although the dimensions of the vascular smooth muscle cell narrow toward their ends there is clear evidence that the end-to-end junctions coupling smooth muscle cells are complex and contain a significant number of membrane invaginations to provide increased surface area for both mechanical tight junctions and …

Which of the following is a feature of smooth muscle?

Smooth muscle is typically non-striated, uni-nucleated, and involuntary or reflexive. This muscle type is slow twitch and often rhythmic in contraction.

Is smooth muscle aerobic or anaerobic?

They have a rapid onset of contractions. They primarily use anaerobic metabolism. They are resistant to fatigue. They cannot exhibit tetanus.

What are smooth muscles?

At a cellular level, smooth muscle can be described as an involuntary, non-striated muscle. Smooth muscle consists of thick and thin filaments that are not arranged into sarcomeres giving it a non-striated pattern. … Smooth muscle can tense and relax but has greater elastic properties than striated muscle.

Why are muscle cells branched?

– In our body, there are several cells present and many of the cells are branched, but muscle cells do not create a foundation for our body. … They are branched to bring information between one cell to the other while the muscle cells formed by the spindle are that way because support is their key function.

Which muscle tissue has short branching cells?

Cardiac muscle are short branching fibers, have a single, centrally located nucleus, show the same striations as skeletal muscle, and are under involuntary control.

Do smooth muscles have Myofilaments?

Myofilaments are the two protein filaments of myofibrils in muscle cells. The two proteins are myosin and actin and are the contractile proteins involved in muscle contraction. … In obliquely striated muscle, the filaments are staggered. Smooth muscle has irregular arrangements of filaments.

What is the difference between smooth and striated muscle?

Striated muscle is composed of muscle fibers, made up of thick and thin filaments, but smooth muscle has interconnected cells to form layers. Skeletal muscle is involved in voluntary movement, whereas smooth muscle serves for involuntary movement inside the body.

What are the characteristics of smooth muscle Class 9?

Spindle-shaped, unbranched, unstriated, uninucleate and involuntary.

Where is the smooth muscle located?

Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control. Skeletal muscle fibers occur in muscles which are attached to the skeleton.

Which of the following is an example of smooth muscle?

Smooth muscle is found in the walls of hollow organs, including the stomach, intestines, bladder and uterus; in the walls of passageways, such as blood, and lymph vessels, and in the tracts of the respiratory, urinary, and reproductive systems.

Do smooth muscle cells divide?

Smooth cells have the greatest capacity to regenerate of all the muscle cell types. The smooth muscle cells themselves retain the ability to divide, and can increase in number this way. As well as this, new cells can be produced by the division of cells called pericytes that lie along some small blood vessels.

Are smooth muscles Uninucleate?

Smooth muscles are uninucleated and striated. It is composed of small spindle- shaped cells with a single, central nucleus. … The function of smooth muscle is to contract like any muscle tissue. – Smooth muscle consists of smooth muscle cell sheets or chains.

What is the structural adaptation of a muscle cell?

Many cells are specialised. They have structures that are adapted for their function. For example, muscle cells bring parts of the body closer together. They contain protein fibres that can contract when energy is available, making the cells shorter.

What are the features of a muscle cell?

Muscle cells contain filaments of protein that slide over each other to cause muscle contraction. The arrangement of these filaments causes the banded appearance of heart muscle and skeletal muscle. They contain many well-developed mitochondria to provide the energy for muscle contraction.

What organelles are in smooth muscle cell?

They have multiple nuclei within each cell. This contrasts with the majority of other cells in human bodies. They also contain many mitochondria, cellular organelles that produce adenosine triphosphate (ATP), the body’s fuel. The short, non-striated — and, hence — smooth muscle cells contain only one nucleus.