Why would someone suggest that fast food is highly addictive? What could be an explanation for this?
Humans prefer foods that are high in fat and sweetness over other foods. Studies with babies show that the preference for sweet foods is acquired early on in life and may be hard to overcome. Foods high in fat content may give people a feeling of fullness or satisfaction that other lower fat foods do not provide. Also, fast food is everywhere and is cheap and convenient.
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________ signals the fat cells to begin releasing their fatty acids during physical activity
a. Leptin b. Glucagon c. Epinephrine d. Neuropeptide Y e. Norepinephrine
A growing child who is consuming adequate protein but only 50% of his or her energy needs will likely be in ________.
A. positive nitrogen balance B. negative nitrogen balance C. nitrogen equilibrium
Which of the following is true of the trends in infant mortality rate and life expectancy in the United States over the past century?
A) Infant mortality rates have increased and average life expectancy has decreased. B) Infant mortality rates have decreased and average life expectancy has increased. C) Both have decreased. D) Both have increased.
An important aspect of a randomized, double-blind, placebo-controlled study is that subjects
A. must receive both treatment and placebo. B. must be blinded as to whether they are in the treatment or placebo group. C. must be assigned to the treatment or control group by the investigator. D. must be aware of whether they are receiving the treatment or placebo.