BIOL 109: Cell Biology

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.

Explore the lethal impact of cyanide on cellular organelles particularly its devastating effect on mitochondria. Our video sheds light on how cyanide halts ATP production bringing cellular functions to a standstill. Ideal for students and educators seeking a comprehensive view of toxicology and cellular biology.

Explore the anatomy of white and gray rami communicantes, their ties to spinal nerves, and the distinct fibers in each ramus. Learn how the myelinated fibers of white rami differ from the unmyelinated fibers in gray rami. Gain a deeper understanding of our nervous system's complexity through these intricate relationships.

This video provides a comprehensive explanation of mucous and serous membranes, defining their characteristics and addressing statements about their epithelial types, functions, and exceptions.

Explore Fluorine's electron configuration and its impact on chemical reactivity. Learn about electron shells, orbitals, and the quest for a complete valence shell.

Explore the intricate eukaryotic cell structure, from the protective plasma membrane to the vital organelles. Learn how DNA, ribosomes, and the cytoskeleton play pivotal roles in cellular function. Dive deep into the world of mitochondria, ER, and the Golgi apparatus.