BIOL 1100: Principles of Biology

Discover the Oparin-Haldane hypothesis detailing Earth's primordial conditions and the potential birth of life. Learn about the abiotic synthesis of organic molecules, the rise of protobionts, and the evolution to the first true cells.

Uncover the fascinating system that nourishes osteocytes in our bones: the osteocyte lacunar-canalicular network. Learn how canaliculi connect these mature bone cells to vital nutrients, ensuring their health even at significant distances from blood vessels.

Explore the influential Three-Domain System of classification, introduced by Carl Woese in 1978. Discover how it categorizes life into Bacteria, Archaea, and Eukarya based on distinctive cellular structures. Learn about the characteristics of each domain, from prokaryotic Bacteria and Archaea to the rich diversity within Eukarya, encompassing Protists, Fungi, Plants, Animals, and the unique world of viruses.

Unpack the intricate process of sound transduction, from the initial vibrations in the ear to the transformation into neural signals. Learn about the vital roles of cochlea, basilar membrane, and hair cells in deciphering our auditory world. A comprehensive guide to the magic behind our hearing.

Learn why lipid-soluble signaling molecules like aldosterone only impact specific target cells. We discuss four theories and reveal that intracellular receptors present only in target cells are the key. This video demystifies the unique mechanism behind aldosterone's selective action.