Unformatted text preview: ule to receptor causes a
change in the structure and activity of the receptor protein.
Response: the altered receptor protein initiates a change in the
enzymatic and/or transcriptional activity of the target cell. 2.
FLUID PLASMA MEMBRANE 2 Reception Relay molecules in a signal
transduction pathway 4 Response Activation
response Signal molecule Figure 11.5 Major Classes of Biochemical Signal Molecules
Amino acid origin
d) II. Amino acids
Modified amino acids — bioamines
Proteins Fatty acid origin
b) III. Derived from chole sterol — steroid s
Derived from arachidonic acid — prostaglandins Dissolved gases
c) to nearby target cells.
3. Endocrine: the messenger
(hormone) diffuses into the
bloodstream to travel to target
cells all over the body.
4. Exocrine: the messenger
(pheromone) diffuses outside of
the organism ’s body to travel to
another organism. CYTOPLASM 3 Transduction Receptor I. Chemical Messengers & Receptors
One cell re...
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This note was uploaded on 09/02/2011 for the course BIOL 6a taught by Professor Staff during the Fall '10 term at DeAnza College.
- Fall '10