Exam 1 Notes

Exam 1 Notes - Cell Studies A nimal Studies Pros Pros Cheap...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Cell Studies Pros: Cheap, can take away or renew nutrients easily and other factors, consistently reproducible Cons: Contamination, cells in culture change, microenvironments different than rest of world *In cell media, cells can be tested and exposed to nearly any condition Animal Studies Pros: Lots of reproduction in small time, close match to humans Cons: Not always same as humans, expensive, regulated but harm risk, may not be same systems needed Nutrition Notes 8/23/10 The Energy Yielding Nutrients Carbohydrates – 4 kilocalories per gram Lipids – 9 kilocalories per gram Proteins – 4 kilocalories per gram - FYI: Alcohol has 47 kilocalories per gram. Other Types of Essential Nutrients Vitamins Minerals Water Non-nutrients That Are in Foods Alcohol Supplements Additives - Increase intake of calcium, vitamins A, B, and C, zinc, and dietary fiber. - Balance energy intake and energy output. 8/25/10 Nutrition Information Television Newspapers, magazines Friends Internet The actual study of nutrition - How can we tell what is valid ?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Scientific Method How to decipher nutrition research It’s a methodical way of establishing a body of information about nutrition that is free from bias (as free as we can make it). The Scientific Method Make an observation Define the problem or ask the question Formulate the hypothesis Collect the data: controlled scientific experiments Interpret the data: does it support or refute the hypothesis? Example of the Scientific Method The observation: There is less heart disease on a Mediterranean diet. Question: Is heart disease linked to the use of olive oil? Hypothesis: Olive oil as dietary fat reduces the risk of heart disease. Two groups: o Experimental group: uses olive oil for fats in diet o Control group: group have typical American diet - Epidemiology – observe and record distribution of disease in human populations (7 countries study). - Case-control studies – compares group with disease with a group without the disease Animal Models Careful human use of animals can help direct human nutrition research if there is an animal model for a human disease. Terms to Know Double blind - Used to described a study in which both the investigator or the participant are blind to (unaware of) the nature of the treatment the participant is receiving. Placebo - An inactive substance or preparation used as a control in an experiment.
Background image of page 2
Control group - In an experiment, the group of test subjects left untreated or unexposed to some procedure, then compared with treated subjects to validate the results of the test. Sample Size - The number of objects in the sample. Cohort Studies
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 18

Exam 1 Notes - Cell Studies A nimal Studies Pros Pros Cheap...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online