BSC 2023 Lecture Notes - Lecture 31: Tight Junction, Cell Membrane, Cardiac Muscle
Document Summary
Smooth er continuous with rough er, but no ribosomes. Gap junctions adhesion junctions serve to mechanically attach adjacent cells. Cytoskeletons of adjacent cells are connected ex: skin cells tight junctions serve to contain fluids. Connections of plasma membrane proteins between neighboring cells ex: digestive system and kidneys gap junctions serve as communication portals between cells. Cytokinesis meisos type of nuclear division that occurs as part of sexual reproduction in which daughter cells receive the haploid number of chromosomes in varied combinations. Growth (g1) stage cell returns to normal size; resumes its functions in body. Synthetic (s) stage a copy is made of all the dna in the cell (dna replication) Growth (g2) stage increase in growth and final preparations for cell division. Dna (deoxyribonucleic acid) genetic material of all organisms. Composed of 2 complementary strands of nucleotides. Dna is localized in the cells nucleus; does not leave.
