The author quotes Snyder et al. in highlight text most probably in order to

Snyder et al. suggest that caffeine's ability to bind to A1 and A2 receptors can be at least partially attributed to which of the following?

According to Snyder et al., all of the following compounds can bind to specific receptors in the brain EXCEPT

In response to experimental results concerning IBMX, Snyder et al. contended that it is not uncommon for psychoactive drugs to have

According to Snyder et al., caffeine differs from adenosine in that caffeine

The primary purpose of the passage is to

It can be inferred from the passage that Davis' paradigm does NOT apply to which of the following?

According to the passage, the earliest research on mangrove forests produced which of the following?

The primary purpose of the passage is to

The primary purpose of the passage is to