“How little we know, how much to discover,
What chemical forces flow from lover to
  lover.
How little we understand what touches off that tingle,
That sudden explosion when
two tingles intermingle.

Who cares to define what chemistry this is?
Who cares with your lips on mine
How ignorant bliss is,
So long as you kiss me and the world
  around us shatters?
How little it matters how little we know?”

“How Little We Know”
by P. Springer and C. Leigh
as recorded by Frank Sinatra, April 5, 1956.

Ó Capitol Records, Inc.

Chapter Outline
34.1 Hormones and Signal Transduction Pathways
34.2 Signal-Transducing Receptors Transmit the Hormonal Message
34.3 Intracellular Second Messengers
34.4 GTP-Binding Proteins: The Hormonal Missing Link
34.5 The 7-TMS Receptors

34.6 Specific Phopholipases Release Second Messengers

34.7 Calcium as a Second Messenger
34.9 The Single-TMS Receptors
34.10 Protein Modules in Signal Transduction
34.11 Steroid Hormones
 
Special Focus: Excitable Membranes, Neurotransmission, and Sensory Systems
 
Test Questions
Problems
Further Reading
Table of Contents
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