To Study the Role of the Endogenous Cannabinoids, Scientists Have

Multiple Choice

To study the role of the endogenous cannabinoids, scientists have used mice genetically engineered to _______ and _______.

A) lack these compounds; drugs that block CB₁ receptors
B) lack CB₁ and CB₂ receptors; drugs that block CB₁ receptors
C) overexpress CB₁ receptors; drugs that prevent metabolism of these compounds
D) overexpress these compounds; drugs that enhance synthesis of these compounds