BIOL2000 Lecture Notes - Lecture 10: Phospholipid, Adenylyl Cyclase, Phospholipase C
Document Summary
Intercellular connections are the basis of multicellularity, which is the physical connection between cells (either direct or indirect via the ecm) Long distance signals: coordinate activities of cells, tissues, and organisms in different parts of a multicellular organism. Hormones are information carrying molecules that are: secreted from a cell, circulates in the body, acts on target cells far from signaling cell. Hormones are long distance messengers: are small and circulated in minute concentratons, but have a very. Large impact on the whole organism hormones can pass through the membrane if they are small. Ligand: chemical message that gets received on the receptor of another: if you have a very hydrophobic hormone, typically these. The function & chemical structure of plant and animal hormones vary widely. Different hormones vary greatly in their hydrophilicity or lipophicility. If the hormone is non steroidal based or larger, the message will have to be received on a plasma membrane of another cell.
