Nutrition for health Flashcards
Four tenants of a healthy diet
Adequacy
* Balance
* Moderation
* Variety
Metabolism
Chemical pathways (ex. Glycolysis) that enable the human body obtain and use energy from food (ex. Glycolysis–breakdown of glucose)
These metabolic chemical pathways sustain life and enable bodily function
* Most metabolic chemical reactions require enzymes
* Enzymes generally need cofactors to function
* Coenzymes (ex. B vitamins) are a group of organic cofactors that assist in many metabolic pathways
Catabolism
Metabolic pathways that break down larger molecules into smaller ones
* Ex. Lipolysis – digestive breakdown of triglycerides into free fatty acids and glycerol
* Ex. Glycolysis – metabolic conversion of glucose into energy (ATP) and metabolic by products
Anabolism
Metabolic pathways that build larger molecules from smaller ones
Requires energy, which is supplied by catabolic processes
* Ex. Muscle protein synthesis - muscle protein repair
Energy balance
- State of caloric equilibrium
- Quantity of consumed calories is equal to the quantity of calories used
BASAL METABOLIC RATE(BMR)
The number of calories you burn as your body performs basic (basal) life-sustaining function.
- Ex.You have a fast metabolism!
Body composition, age, and sex
Estimated energy requirements(EER)
An EER is defined as the average dietary energy intake that is predicted to maintain energy balance in healthy, normal weight individuals of a defined age, sex, weight, height, and level of physical activity consistent with good health.
Total Daily Energy Expenditure (TDEE)
is the total number of calories that your body expends in 24 hours, including all activities. TDEE considers
Basal metabolic rate
* Physical activity
* Height
* Weight
* Age
Body composition
Relative measurement of body tissues expressed as a percent body fat
* Percent adipose tissue
Adipose tissue
Also known as body fat
* Connective tissue composed of fat cells(ie.Adipocytes) that function in fat storage
Visceral fat
Adipose tissue surrounding and between organs
Subcutaneous fat
Adipose tissue underneath the skin
Metabolic syndrome
a cluster of conditions including increased blood pressure, high blood sugar, excess body fat around the waist (ie. Visceralfat), and abnormal cholesterol or triglyceride levels.
Metabolic syndrome is closely linked to overweight or obesity and inactivity.
* These conditions, together or alone, increase the risk of developing heart disease, stroke and type 2 diabetes
Insulin Resistance
is when cells in your muscles, fat, and liver don’t respond well to insulin and can’t easily take up glucose from your blood
If your cells become too resistant to insulin, it leads to elevated blood glucose levels (hyperglycemia), which, over time, leads to prediabetes and Type 2 diabetes
Obesity
characterized by excessive and unhealthy amounts of body fat