Heroin is more potent than morphine because
A. it is often injected instead of swallowed.
B. it more readily crosses the blood-brain barrier.
C. it is a natural opioid.
D. it is a synthetic opioid.
B
Psychology
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Which of the following lists the correct order in which light activates the visual cells of the retina?
a. rod and cone cells; bipolar cells; ganglion cells b. ganglion cells; bipolar cells; photoreceptors c. bipolar cells; ganglion cells; rod and cone cells d. ganglion cells; rod and cone cells; photoreceptors e. glial cells; cones; ganglion cells; bipolar cells
Psychology
If you have long periods of failing to breathe while asleep, what disorder do you have?
a. Hypersomnia b. Sleep apnea c. Narcolepsy d. Insomnia
Psychology