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15. Circadian rhythms can be described as a A) repetition of physiological events such as a heartbeat B) sequence of brain activity following stimulation C) monthly behaviour or physiological cycle D) weekly behaviour or physiological cycle E) daily behaviour or physiological cycle
38. The circadian rhythm is influenced by light-sensitive retinal proteins that trigger signals to the a. suprachiasmatic nucleus. b. thyroid gland. c. sleep spindles. d. dopamine reward system.
27. Following an intense, 4 hour exam, sleep is usually deeper and lasts somewhat longer. This supports the theory of sleep. A) peripheral feedback B) circadian rhythm C) preservation and protection D) restoration E) evolution
