In mathematics, the Fibonacci numbers or Fibonacci series or Fibonacci sequence are the numbers in the following integer sequence: (sequence A000045 in OEIS) By definition, the first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two.
Tight Junctions. Tight junctions are found predominantly in epithelial tissues, such as intestinal brush border. Water and other fluids must be prevented from leaking between adjacent cells, so that body fluids do not gradually seep across the intestinal lining.
IX. 3 Types Of Cell Junctions Found In Animal Tissues A. tight junctions 1. neighboring cells held tightly together via proteins 2. prevent leakage B. desmosomes (anchoring junctions) 1. function like rivets to hold cells together in strong sheets 2. common in tissues subject to stretching or mechanical stress a. skin & muscle C. gap junctions 1. are communicating junctions 2. protein lined pores 3. allow small molecules to flow between adjacent cells a. ions of heart cells to coordinate contraction b. enable embryo cells to communicate â¢ A desmosome forms a very strong spot weld between cells. It is created by the linkage of cadherins and intermediate filaments. (credit: modification of work by Mariana Ruiz Villareal)