Age-related changes can have a broad variety of impacts on an older person's life. Which of the following is most likely to be affected by age-related hearing loss?

After flying from California to New York, Arthur experienced a restless, sleepless night. His problem was most likely caused by a disruption of his normal:

a. REM sleep. b. circadian rhythm. c. hypnogogic state. d. alpha wave pattern.

Tardive dyskinesia occurs with prolonged blocking of:

a. Dopamine receptors b. Serotonin receptors c. Glutamate receptors d. All of the above