As a child, Adrienne received a burn from a campfire and subsequently developed a fear of open flames. As she got older, the fear gradually faded until Adrienne had all but forgotten it. In her late teens, Adrienne was invited to a party at a neighbor's house. As she walked into the backyard, she noticed flames roaring up from a fire pit, and she felt fearful. Her behavior is an example of .A) stimulus discrimination.
B) acquisition.
C) recall.
D) spontaneous recovery.

What is the difference in the phisical activity requirements for achieving healt benefits and performance?

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

Viruses ) manufacture their own atp, proteins, and nucleic acidsb) use the host cell to copy themselves and make viral proteinsc) use the host cell to copy themselves and then viruses synthesize their own proteinsd) metabolize food and produce their own atp