Lecture 6 Slides

Lecture 6 Slides - Lecture 6 Homeostasis, super-sizing, and...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 6 Homeostasis, super-sizing, and the sweet tooth: Is there an epidemic of obesity and how does agribusiness contribute to it?
Background image of page 1

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

View Full DocumentRight Arrow Icon
The incidence of obesity between 1992 and 2004
Background image of page 2
Why Have Obesity Rates Increased? Why Have Obesity Rates Increased? • Average intake of soft drinks: 53gallon/American/year • Price rises 1985-2000: – Fresh fruits:118% sugar and sweets 46% – Vegetables 77% fats and oils 35% – Fish and dairy 56% carbonated beverages 20% • Serving sizes have increased over time • Consumption of calories away from home increased from 18% to 32% between 1977 and 1996 • Children exposed to about 10 food commercials/hour of TV viewing, mostly for sweets
Background image of page 3

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

View Full DocumentRight Arrow Icon
Calories and the Cause of Obesity: Intake vs. Expenditure • Food processors point out that decreased exercise contributes to obesity as much as does increased consumption • Rates of exercise have not decreased enough to account for the rise in obesity • Caloric intake rose 12% (300 cal/day) between 1985 and 2000 • Individuals with BMI>30 are considered obese (see http://www.nhlbisupport.com/bmi/)
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Feedback regulation helps systems stay close to an ideal “set point”
Background image of page 7

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

View Full DocumentRight Arrow Icon
Negative Feedback is the Key to Homeostasis
Background image of page 8
Blood Sugar is Homeostatically Regulated Insulin is released from the pancreas in response to a rise in blood sugar. Insulin causes
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 23

Lecture 6 Slides - Lecture 6 Homeostasis, super-sizing, and...

This preview shows document pages 1 - 10. Sign up to view the full document.

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