Cell and its components pdf

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cell components, including phospholipids and transmembrane proteins, into polymersomes or other synthetic membranes with mismatched thickness or other biocompatibility issues (30). Al-though human cell membranes are expected to be amenable to similar coassembly with synthetic components from DSs or Cells are the smallest working units of all living things. 3. All cells come from pre-existing cells through cell division. Number of Cells Organisms may be: •Unicellular- composed of 1 cell OR •Multicellular- made of many cells Cells can be Eukaryotic or Prokaryotic •Prokaryotes:do not have a nucleus or organelles (bacteria). A cell is the basic and smallest life's unit which is responsible for all life's processes. Cells are the functional, structural, and biological units of all living beings. A cell can also be independently replicated. Thus, the cells are called the building blocks of life. Each cell contains a fluid known as cytoplasm, enclosed by a membrane. Cell components and their Functions: Plasma Membrane: Main function is Protection. Prevents entry of harmful Substances holds cell together. Transport of Metabolites cell to cell recognition and communication. Plays an major role in Immune response. Involved in Hormonal Action. Helps in Conduction of Action potential. Endoplasmic Reticulum (ER): Their cytoplasmic components may interact with the cytoskeleton triggering changes in cell shape or motility, or with certain tumor suppressor molecules or they may act as nuclear transcription factors or co-activators. In some instances, the loss of cell-cell or cell-matrix contact may lead to apoptosis (programmed cell death), whereas in others, loss of contact may lead to loss of cell It also organizes some of the cell components maintaining the cell shape ; It plays a major role in the movement of the cell and some cell organelles in the cytoplasm. The tiny filaments include: Actin filaments; also known as microfilaments; it's a meshwork of fibers running parallel to each other and they play a primary role in giving the cell its shape; they change consistently, helping mechanism. This type of cell that constitutes less then 1% of the blood volume attacks harmful microorganisms such as viruses and bacteria. Once arrived at the "scene", most white blood cells destroy invading microbe by phagocytocis (a form of endocytosis). Once the microbe is engulfed, the leukocyte releases an enzyme that then digests the The three components of the environment give rise to four important zones. These are Atmosphere, Hydrosphere, Lithosphere and Biosphere. There is continuous interaction among these four zones. These interactions involve the transport of various elements, compounds and energy forms. These zones are explained as follows. FUNCTIONAL REGION OF CELL EDU NET. 9. FUNCTIONAL REGIONS:- PLASMA MEMBRANE Also called as cell membrane. It is the outer most covering of each cell, which separates its contents from the surrounding medium. It is made up of lipids (fats) and proteins (building blocks of the body). FUNCTIONS:- 1. Regulates the movement of the molecules in and ADVERTISEMENTS: Let us make an in-depth study of the