STARTS with chemical
message which is
transduced into specific
forms and sent out
Analogy: Jimi Hendrix playing
guitar; vibrations he plays on
strings is transduced by magnets
into an electric signal
Receptors pick up
message and modify it
Types of receptors: G
couple protein receptors,
Tyrosine KINASE receptors,
ligand gated ion channel
then sent to
transduction where
the message is made
in a specific form
(secondary
messenger) for the
target cell
ex. cAMP
EX. Epinephrine (ligand) binds with
G-protein (receptor); change in shape
of protein and subunit is released to
Adenylyl Cyclase (protein) which
activates adenylyl - converts ATP in
cAMP (secondary messenger); cAMP is
spread through out the cell targeting
protein kinase; extras able to bond
with other proteins in cell such as
phosphate which phosphorilizes to
produce glucose