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How many t tubules in a muscle cell?
A muscle cell, or myocyte, typically contains a network of T tubules that are organized around the myofibrils. Each muscle cell has two T tubules per sarcomere, which correspond to the A-I junctions of the sarcomeres. Therefore, the total number of T tubules in a muscle cell depends on the number of sarcomeres present, which can vary widely among different muscle types and sizes. In general, a typical skeletal muscle fiber can have hundreds to thousands of T tubules.
Adult cell types you might expect to have gap junctions include?
Neurons, cardiac muscle cells, and smooth muscle cells are adult cell types that typically have gap junctions. Gap junctions allow for direct electrical and chemical communication between neighboring cells, facilitating coordination and synchronization in tissue function.
Where would you expect to find numerous gap junctions in the muscular tissue?
You would expect to find numerous gap junctions in cardiac muscle tissue and certain types of smooth muscle tissue. In cardiac muscle, gap junctions facilitate the rapid propagation of electrical signals necessary for synchronized heart contractions. In smooth muscle, they enable coordinated contractions across muscle fibers, allowing for effective movement of substances through hollow organs. Gap junctions play a crucial role in cell-to-cell communication in these tissues.
What are the two types of cellular junctions found at intercalated disc?
Cardiac muscle is network of branched fibers (cells) connected by gap junctions called intercalated disks.
Is the cardiac muscle branched?
No. Smooth muscle and cardiac muscle are two different types of muscle tissue. Smooth muscle does not have striations (or stripes) and is located in the organs. Cardiac muscle is striated (has stripes) and fits together with gap junctions that allow for quick passage.
What are individual muscle cells termed?
Another name is myocyte. It is formed from a myoblast. There are three types: smooth, striated and cardiac cells.
The main structural difference that cardiac muscle have that other two types dont?
Intercalated discs. These are specialized cell junctions which link the cardiac muscle cells electrically and mechanically together. Impulses are distributed immediately and simultaneously so that cardiac muscle cells contract as a single unit.
Do all animal cells have all types of cell junctions?
No
Does The nucleus of a cell in your thigh muscle contains the same genes as the nucleus of a cell in your brain?
Yes, the nucleus of a cell in your thigh muscle and the nucleus of a cell in your brain both contain the same set of genes. However, different genes are activated in different types of cells, leading to the development of specialized muscle or brain cells with distinct functions.
What is myofilament?
Myofilaments are the protein fibers within muscle cells that slide past each other to cause muscle contractions. There are two main types of myofilaments: thin filaments, made up of actin protein, and thick filaments, made up of myosin protein. The interaction between these two types of filaments is essential for muscle contraction.
What are the four types of cellular junctions?
plasmodesmata tight junctions desmosomes gap junctions the plasmodesmata is the only cell junction in the plant cells.. and the other three cell junctions are in the animal cells...
What are three types of extracellular junctions?
Within the multicellular organism tissues, a cell junction occurs. Animals have four kinds of intercellular junctions which are gap junction, desmosomes, adherens junction and tight junction,
