10. Cell Signaling
Types of Cell Signaling
Multiple Choice
Multiple ChoiceWhen a platelet contacts a damaged blood vessel, it is stimulated to release thromboxane A2. Thromboxane A2 in turn stimulates vascular spasm and attracts additional platelets to the injured site. In this example, thromboxane A2 is acting as a __________.
A
neurotransmitter
B
transcription factor
C
protein kinase
D
G protein
E
local regulator
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