BIOL 1201 Chapter : Biology Lecutre XXX November 15
Document Summary
Direct contact: one cell physically directing contact to another. Local: one cell signaling another cell adjacently or paracrine synaptic signals. Distant: hormone signaling, usually involves the endocrine system. If proteins are involved, there will be a high level of specificity. by themselves, that s why the receptor is outside the cell. 1)reception: most of the receptors are proteins bound in the plasma membrane. The signal molecules for those receptors cannot pass through the membrane. Some of the receptors are proteins located in the cytoplasm. This tells us that they are membrane permeable. 2)transduction: the action or process of converting something (especially energy or. Receptor g-proteins often have a membrane bound receptor. Signal binds the to the receptor and activates it. It is activated by adding gtp to gdp. It then activates an enzyme a message) into another form. Two receptors next to each other, bind the ligand. Once the ligand is binded, the receptors join together and make a dimer.
