BSC 109 Lecture Notes - Lecture 35: Sodium Bicarbonate, Pepsin, Duodenum
24 Oct 2016
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BSC 109 Chapter 14 Part 3
The Digestive System and Nutrition
October 24, 2016
Clicker: _____ is released by the small intestine in response to the arrival of acidic chime and
simulates the production of sodium bicarbonate. Secretion
Clicker: Pepsin helps to digest ______ in the _______. Proteins/Stomach (If you see an
enzyme or a protein in this chapter, know where it is made, what it does, where it does it)
Clicker: Which organ produces bile? Liver
Clicker: When food enters the small intestine, it first passes through which region? Duodenum
Clicker: Dietary lipids are absorbed by the blood stream. False – they are too large.
Weight Control: Energy Consumed Versus Energy Spent
• Every unburned 3,500 calories = 1lb weight gain
• Energy balance and body weight
- Caloric content
- Fat = 9 calories/gram
- Proteins and sugars = 4 calories/gram
- Excess caloric intake leads to increased storage of fat and weight gain
• Number of fat cells likely determined by adulthood
• Losing fat shrinks the cells, but they can readily refill making it difficult to lose weight
• Physical activity uses calories
• Healthy weight improves health
• BMI: body mass index
- BMI between 18.5 and 25 is healthy
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Document Summary
Clicker: _____ is released by the small intestine in response to the arrival of acidic chime and simulates the production of sodium bicarbonate. Clicker: pepsin helps to digest ______ in the _______. Proteins/stomach (if you see an enzyme or a protein in this chapter, know where it is made, what it does, where it does it) Clicker: dietary lipids are absorbed by the blood stream. Weight control: energy consumed versus energy spent: every unburned 3,500 calories = 1lb weight gain, energy balance and body weight. Bmi between 18. 5 and 25 is healthy. Bmi >30 is considered obese: bmi inaccuracies: May overestimate body fat in very muscular or heavy-boned individuals. May underestimate body fat in people who have lost muscle mass. Eating disorders: characterized by abnormal eating habits that damage an individual"s health, most common in young women living in industrialized countries, three types of eating disorders: Anorexia nervosa: excessive dieting, possibly to the point of starvation and death.
