For many people, eating is one of life’s greatest pleasures and they spend much time gathering, preparing and eating food. However, some of us would rather do other things with our time and it would be great if we did not have to eat at all. Alas, eating is a necessity. Choose the one FALSE reason why humans have to eat.
A. We need to obtain cholesterol for our cell membranes in our diet.
B. We need to obtain trace elements such as iron in our diet.
C. We need to replace water that we lose through sweat, breathing and urination.
D. We need to obtain many different vitamins in our diet.
E. We cannot make all twenty amino acids.
F. We are heterotrophs.
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
Gather Content
· What do you know about essential nutrients in humans? What other information is related to the question?
Choose Answer
· Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A. We need to obtain cholesterol for our cell membranes in our diet.
Clarify Question
· What is the key concept addressed by the question?
o The question asks about essential nutrients.
· What type of thinking is required?
o You are being asked to apply your knowledge about essential nutrients to explain what humans do not need to consume.
Gather Content
· What do you know about essential nutrients in humans? What other information is related to the question?
o Humans are heterotrophs who need to consume food and drink water to generate the energy and building blocks they need to survive. In addition, they need to consume essential nutrients that they cannot make on their own in sufficient levels. These include vitamins, minerals such as iron, calcium, magnesium, phosphorus, and other inorganic substances. Many vertebrates, are unable to synthesize one or more of the 20 amino acids. These essential amino acids must be obtained from food they eat. Humans require nine amino acids. In contrast, vertebrates can synthesize the lipid cholesterol, a key component of steroid hormones.
Choose Answer
· Given what you now know, what information is most likely to produce the correct answer?
o Vertebrates can synthesize the lipid cholesterol, so this does not need to be consumed. All of the other statements are true.
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
o This question asked you to apply your knowledge about essential nutrients to explain what humans do not need to consume. If you got the correct answer, great job! If you got an incorrect answer, where did the process break down? Did you think that humans could not make cholesterol? Did you think that humans could make vitamins or one of the other essential nutrients?
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