Which muscle has cylindrical cells

Note central location of muscle nuclei. Note the "stacks" of mitochondria between myofibrils. Cardiac muscle is even richer than skeletal muscle in mitochondria again, important for energy production. An intercalated disc is present in the upper left region of the picture. The micrograph will help you understand the pattern, which arises from the inner circular layer and outer longitudinal layer of smooth muscle cells.

Without the knowledge in which direction the intestinal epithelium is located, it is not possible to discriminate between the two sublayers of the muscularis externa. Here you can see the filaments in cross-section, appearing as dots. Also, the dark areas, which are membrane-associated, are called dense plaques and are sites of filament attachment. The plane of section is generally responsible for making some cells look larger than others. Some skeletal muscle cells on your slide may be sliced through the middle and appear quite large, while as other cells may just graze the section and appear much smaller.

Also, some muscle cells are simply smaller or larger than others. They can range in size from 10 to mm in width. Identify the structures that are functionally analogous to caveolae in smooth muscle cells.

Correct answer 4. Like the sarcoplasmic reticulum in skeletal muscle cells, caveolae sequester and release calcium ions in smooth muscle cells. Identify the statement that is true about the predominant tissue depicted in this slide. The tissue shown is smooth muscle; all of the other responses apply to skeletal muscle well, choice 3 actually applies to both cardiac AND skeletal muscle.

Correct answer 2. The tissue is cardiac muscle. Note the striations, branched fibers, intercalated discs, and centrally-located nuclei. Jump to: Suggested Readings. Learning Objectives. Skeletal Muscle. Cardiac Muscle. Smooth Muscle. Electron Micrographs. Review Questions. Practice Questions. Suggested Readings. Wheater's, pgs. Ross and Pawlina 6th ed , Chapter 11 Muscle Tissue, pgs. Be able to name and to identify the three types of muscle at the light and electron microscope levels, including distinctive features of each, such as the intercalated discs of cardiac muscle.

Be able to describe and understand the structural basis of muscle striation at the light microscope and EM levels and the molecular level. Know the structural elements that harness muscle contraction i. Understand where stem cells are located in skeletal muscle and be able to identify their location at both the light and EM levels.

In study mode, the images will contain labels and a description. In quiz mode, labels and description will be hidden. Study Mode. With this dye, the A-bands are stained dark and the I-bands light. Since both cardiac muscle fibers and skeletal muscle fibers are striated, how would you differentiate between them in a histological slide? This is a section of the tongue. Begin by identifying groups of fasciculi cut in transverse section.

Where are the nuclei located within a cell? Can you identify the endomysium and the perimysium? Where can capillaries be found? How does the location of capillaries in muscle differ from peripheral nerves? As you zoom in on the image, note the abundance of capillaries in between the cardiac muscle cells. Why are so many capillaries necessary? Note how the cardiac muscle cells are striated, like skeletal muscle cells. However, unlike skeletal muscle, note how the end of each cells splits into branches.

In addition, the single nuclei of cardiac muscle cells are located centrally. Identify the intercalated discs. What are the functions of the intercalated discs?

This is a transverse section of the gastrointestinal tract. Locate the two layers of smooth muscle and zoom in on them. In which direction do the fibers of each layer run? How would you describe the morphology of each smooth muscle cell?

How many nuclei are there per cell and where are they located within the sarcoplasm? Pathology Please select whether to view the slides in study mode or quiz mode. Quiz What type of muscle tissue is this?

After a while, several cells link up and they begin contracting in synchrony. Discuss what is going on and what type of cells you are looking at. Privacy Policy. Skip to main content. Chapter 4. The Tissue Level of Organization. Search for:. Skeletal muscle cells are striated. Review Questions 1. Critical Thinking Questions 1. Why does skeletal muscle look striated? Glossary cardiac muscle heart muscle, under involuntary control, composed of striated cells that attach to form fibers, each cell contains a single nucleus, contracts autonomously myocyte muscle cells skeletal muscle usually attached to bone, under voluntary control, each cell is a fiber that is multinucleated and striated smooth muscle under involuntary control, moves internal organs, cells contain a single nucleus, are spindle-shaped, and do not appear striated; each cell is a fiber striation alignment of parallel actin and myosin filaments which form a banded pattern.

They have an intrinsic ability to contract. When they link up, they form intercalating discs that allow the cells to communicate with each other and begin contracting in synchrony.

Under the light microscope, cells appear striated due to the arrangement of the contractile proteins actin and myosin. Involuntary movement, moves food, involuntary control of respiration, moves secretions, regulates flow of blood in arteries by contraction.

Watch this video to learn more about muscle tissue. In looking through a microscope how could you distinguish skeletal muscle tissue from smooth muscle? The three types of muscle cells are skeletal, cardiac, and smooth. Their morphologies match their specific functions in the body. Skeletal muscle is voluntary and responds to conscious stimuli.

The cells are striated and multinucleated appearing as long, unbranched cylinders. Cardiac muscle is involuntary and found only in the heart. Each cell is striated with a single nucleus and they attach to one another to form long fibers.

Cells are attached to one another at intercalated disks. The cells are interconnected physically and electrochemically to act as a syncytium. Cardiac muscle cells contract autonomously and involuntarily. Smooth muscle is involuntary.

Each cell is a spindle-shaped fiber and contains a single nucleus. No striations are evident because the actin and myosin filaments do not align in the cytoplasm. Skeletal muscle is composed of very hard working cells. Which organelles do you expect to find in abundance in skeletal muscle cell?