Respuesta :
The answer is; C
The cytoskeleton in human cells is mainly composed of microtubules and microfilaments protein filaments. They are capable of contracting hence changing the shape of the cell. They are important in the migration of organelles within a cell and in cytokinesis of cell division. They also play a significant role in the unison contraction of cells in a muscle.
The microfilaments and microtubules are protein filaments that make up the cytoskeleton. These filaments are capable of contraction and therefore, can change the cell shape. The cytoskeleton also facilitates the movement of organelles inside the cell.
Further Explanation:
A complex network of protein filaments interlinked together to form the cytoskeleton which is found in the cell cytoplasm. The cytoskeleton extends to the cell membrane from the cell nucleus. The main components of the cytoskeleton are intermediate filaments, microfilaments, and microtubules. Each of these components can undergo assembly or disassembly depending on the requirements of the cell.
The cytoskeleton performs a variety of functions. Its main function involves the maintenance of cell shape and also provide resistance against deformation. It also helps in the stabilization of entire tissue through its cooperation with the connective tissues. The components of the cytoskeleton have the ability to contract which thereby facilitate the deformation of the cell and its environment. This results in the movement of cells. The cytoskeleton also helps in endocytosis or taking up the extracellular material inside the cell. It is important during cell division for chromosome segregation, intracellular transport of material, and cell signaling pathways.
The muscle contraction is performed by the cytoskeleton in association with specialized cells that work together. The microfilament is an important component of the cytoskeleton which facilitates muscle contraction. Actin is a cellular protein that binds together to form microfilaments. Another protein myosin is a motor protein that is present within the muscle cell and exerts a force on actin filament during muscle contraction. The contraction starts as the nerve impulse causes the release of calcium from the sarcoplasmic reticulum. As the amount of calcium increases inside the cytosol, the muscle begins to contract with the help of tropomyosin and troponin. Troponin is responsible for sensing the calcium increase and also prevent the myosin and actin inhibition through tropomyosin. The assembly and disassembly of actin and myosin along with other protein enable the muscles to contract and relax.
Learn More:
1. Learn more about the treatment of eukaryotic cell with a drug https://brainly.com/question/10767798
2. Learn more about the proteins synthesis in a cell https://brainly.com/question/1420458
3. Learn more about the exchange of gases by blood cells https://brainly.com/question/1213217
Answer Details:
Grade: High School
Chapter: The Cytoskeleton
Subject: Biology
Keywords:
Cytoskeleton, microfilament, microtubule, intermediate filament, cell division, cytokinesis, cell shape, intracellular transport, endocytosis, muscle contraction, actin, myosin, tropomyosin, troponin.
