Mechanism of Action of Lipid-Soluble Messengers
Mechanism of Action of Lipid-Soluble Messengers
How is the concentration of molecules that can freely pass through cellular membranes controlled inside cells? Many hormones are small, nonpolar molecules that can freely pass through a plasm membrane. Hormones are used in cell signaling and are used to turn specific genes on or off in specific cells. However, if hormones can freely diffuse in and out of cells it would seem to be difficult to build up concentrations in specific parts of the body. If the concentration of a hormone is uniform throughout the body then it has little value as a cellular signal. The answer to this problem is that, once hormones enter target cells, they bind to receptor proteins to from a complex that activates gene expression. Once bound the hormone cannot diffuse back out of the cell and the concentration can increase.
About BeeGames social
Playground and Play together are the BeeGames social layer — so you're never just playing alone.
What is a Playground?
Your Playground is your own personal game homepage. Pin the games you love, give it a name and a short bio, then make it public to share your personal arcade with anyone.
How do I use my Playground?
On any game page, tap “Playground” to pin that game. Head to My Playground to edit its name, bio and layout, then share your public link with friends.
What is Play together?
Play together lets you co-play the same game with friends in real time. Open a game room and everyone can play side by side while chatting in the room — like crowding around one screen, online.
How do I play with friends?
Tap “Play together” on a game page, pick a public room or a private one with a password, then share the room link with friends. You can also browse and join open rooms from the Lobby.