The lowest value of a stimulus that can be detected is called the

Suppose someone asks you, "On a scale from 1 to 10, with 1 being 'all nature' and 10 being 'all nurture' where would you put Alzheimer's disease?" Based on information provided in the text, the BEST answer probably is:

a) "definitely 1" b) "probably a 2 or a 3" c) "a 5, I guess" d) "most certainly a 9 or 10"

What is the main reason why high school students are sleep deprived?

a) Teens need more sleep than younger children, because they have higher metabolic rates. b) The hormones of puberty push teens' sleep cycles to later in the evening, yet teens have to get up early to start the school day. c) Teenagers can spend time 24/7 talking to their friends on social media. d) Teenagers are having too much fun at night to get to bed on time; even when they are tired, they rebel against adults by refusing to go to bed.