Table of Contents
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Active transport
The movement of molecules from an area of lower concentration to the area of a higher concentration, with the expenditure of energy
Cell membrane
A thin and elastic membrane covering the cytoplasm of all prokaryotic and eukaryotic cells
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Cell theory
One of the most fundamental education about cells, proposed by Schleiden and Schwann
Cell wall
The non-living and strong component of the cell, located outside the cell membrane, in plants, fungi, prokaryotes, and many protists
Centriole
The hollow and cylindrical organelles present in the cells of animals and many unicellular organisms
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Chloroplast
The green plastids found in plants and many protists; involved in photosynthesis
Chromoplast
The plastids with pigments of bright colors: are present in flower petals, fruits, etc.
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Cytoplasm
The semi-viscous and semi-transparent substance present between the plasma membrane and the nuclear envelope
Diffusion
The movement of molecules from an area of their higher concentration to the area of lower concentration
Endoplasmic reticulum
The network of channels that extends from plasma membrane to the nuclear envelope
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Epithelial tissue
Animal tissue that covers the outside of the body and lines organs and cavities
Facilitated diffusion
The movement of the molecules from higher to lower concentration with the help of transport proteins
Golgi apparatus
The set of flattened sac-like structures called cisternae; found in animal and plant cells; are involved in cell secretions
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Mitochondrion
The double membrane-bounded structure in eukaryotes; is involved in cellular respiration
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Osmosis
The movement of water molecules from a solution of lesser solute concentration to a solution of higher solute concentration, across a semi-permeable membrane
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Ribosome
Tiny granular structures in the cells; either floating freely in the cytoplasm or bound to the endoplasmic reticulum, involved in protein synthesis
Semi-permeable
The structure that allows a very few molecules to cross it and checks the majority of molecules to cross
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Tissue
Group of cells of the same type doing a particular job, e.g. the glandular tissue, muscular tissue, nervous tissue etc
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