Podcast
Questions and Answers
What is the metric prefix that represents one thousandth of a unit?
What is the metric prefix that represents one thousandth of a unit?
milli-
How many centimeters are in an inch?
How many centimeters are in an inch?
approximately 2.54
What is the approximate weight in grams of one ounce?
What is the approximate weight in grams of one ounce?
28
How many grams are in a kilogram?
How many grams are in a kilogram?
Signup and view all the answers
If a person weighs 150 pounds, what is their approximate weight in kilograms?
If a person weighs 150 pounds, what is their approximate weight in kilograms?
Signup and view all the answers
What is the metric prefix that represents one hundredth of a unit?
What is the metric prefix that represents one hundredth of a unit?
Signup and view all the answers
How many liters are in a kilogram?
How many liters are in a kilogram?
Signup and view all the answers
If a recipe calls for 250 milliliters of a ingredient, how many liters is that?
If a recipe calls for 250 milliliters of a ingredient, how many liters is that?
Signup and view all the answers
What is the weight of each piece of raisin if a small raisin weighing 1 gram is cut into 1000 equal pieces?
What is the weight of each piece of raisin if a small raisin weighing 1 gram is cut into 1000 equal pieces?
Signup and view all the answers
What is the unit of measurement used to express the amount of energy in food?
What is the unit of measurement used to express the amount of energy in food?
Signup and view all the answers
How much energy does a gram of carbohydrate and a gram of protein each supply?
How much energy does a gram of carbohydrate and a gram of protein each supply?
Signup and view all the answers
What is the term used to describe the nutrients that the body needs in relatively large amounts?
What is the term used to describe the nutrients that the body needs in relatively large amounts?
Signup and view all the answers
What is the term used to describe the nutrients that the body needs in very small amounts?
What is the term used to describe the nutrients that the body needs in very small amounts?
Signup and view all the answers
Why is water not classified as a macronutrient?
Why is water not classified as a macronutrient?
Signup and view all the answers
What is the purpose of food composition tables and nutrient analysis software?
What is the purpose of food composition tables and nutrient analysis software?
Signup and view all the answers
If a serving of food contains 10 g of carbohydrate, 2 g of protein, and 5 g of fat, how many kcal does it provide?
If a serving of food contains 10 g of carbohydrate, 2 g of protein, and 5 g of fat, how many kcal does it provide?
Signup and view all the answers
What is a normal blood glucose level for a healthy fasting person?
What is a normal blood glucose level for a healthy fasting person?
Signup and view all the answers
What is the unit of measurement used to express the amount of a substance in the blood?
What is the unit of measurement used to express the amount of a substance in the blood?
Signup and view all the answers
Study Notes
Metric System Basics
- The metric system is used to report length (meter), weight (gram), and volume (liter) in science.
- Common metric prefixes include:
- kilo- (k) = one thousand (1000)
- deci- (d) = one-tenth (0.1)
- centi- (c) = one-hundredth (0.01)
- milli- (m) = one-thousandth (0.001)
- micro- (μ or mc) = one-millionth (0.000001)
Converting Units
- To convert inches to centimeters, multiply by 2.54.
- To convert ounces to grams, multiply by 28.
- To convert pounds to kilograms, divide by 2.2.
Understanding Calories
- A calorie is the heat energy necessary to raise the temperature of 1 g of water 1° Celsius.
- A kilocalorie (kcal) or Calorie is the heat energy needed to raise the temperature of 1000 g of water 1° Celsius.
- A gram of carbohydrate supplies about 4 kcal, a gram of protein supplies about 4 kcal, and a gram of fat supplies about 9 kcal.
Estimating Energy Content
- To estimate the energy content of a food, multiply the weight of each macronutrient (carbohydrate, protein, and fat) by its caloric value.
- For example, a serving of food with 15 g of carbohydrate, 3 g of protein, and 7 g of fat would provide approximately 135 kcal.
Macronutrients and Micronutrients
- Macronutrients (carbohydrates, fats, and proteins) supply energy for cells and are needed in large amounts (grams) daily.
- Micronutrients (vitamins and minerals) do not supply energy and are needed in small amounts (milligrams or micrograms) daily.
- Food composition tables and nutrient analysis software provide approximate values for each nutrient measured.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Learn to identify basic units of the metric system used in nutrition, estimate energy in a serving of food, and classify nutrients based on their composition and functions.
