The liver regulates hunger by monitoring the balance of ____.?

With respect to states of consciousness, beta waves are to delta waves as _____ is to _____.

A. deep sleep; alert wakefulness B. drowsy wakefulness; deep sleep C. alert wakefulness; deep sleep D. alert wakefulness; drowsy wakefulness

_____ is the number of cycles completed by a sound wave in one second, measured as _____ determining the _____ of a sound

a) Pitch; frequency; oscillations b) Hertz; frequency; cycles c) Frequency; tone; pitch d) Frequency; hertz; pitch