Month: June 2020

  • CELL JUNCTION

    The cells of epithelial and other tissues are held together by various types of cell junctions, that can be categorized into 3- main groups – (I) Adhesive junctions The cells of epithelial tissue and even cardiac muscles are difficult to separate due to the presence of adhesive junctions. Such junctions are of 2-types (a) Adherens…

  • ANGIOSPERMS (FLOWERING PLANTS)

    Angiosperms are most dominant and most evolved plants on this earth, appeared about 130 million years ago in Jurassic (dicot plant) and cretaceous (monocot plants) period of the Mesozoic era. Tertiary period of Cenozoic era is called as Age of angiosperms. Angiosperms are found in every habitat. They constitute more than 50% of the total…

  • Active Transport

    A few ions or molecules are transported across the membrane against their concentration gradient, i.e., from lower to higher concentration. Such type of transport is called active transport because it is an energy-dependent process in which ATP is utilised, e.g., Na+/K+ pump. https://youtu.be/visqfZd7Ms4 Active transport uses energy to pump molecules against a concentration gradient. Active…