Understanding Human Body and Energy

What is the primary function of the circulatory system?

• To send nerve signals

• To control body movements

• To break down food molecules

• To transport oxygen, nutrients, and waste products

Which of the following is NOT a basic body system mentioned in the text?

• Skeletal-muscular

• Digestive

• Excretory

• Cardiovascular

What begins the digestion process in the human body?

• Stomach acids

• Saliva in the mouth

• Intestinal enzymes

• Liver bile

Which nutrient is NOT used by the body to build new cells?

• Vitamins

• Water

• Fats

• Minerals

According to the U.S. Department of Agriculture, what should people eat less of?

• Meat, fat, and sweets

• Grains and vegetables

• Fruits and nuts

• Dairy and eggs

What happens to the molecules of a solid when heat is applied?

• They decrease in motion

• They vibrate faster and may change state

• They dissolve into liquid

• They bond more tightly together

What is the kinetic molecular theory of matter?

• Theory that matter is made up of static particles

• Theory that matter cannot change states

• Theory describing matter as molecules in motion

• Theory that matter expands when heated

What does the law of conservation of energy state?

• Energy is only transformed, not created or destroyed

• Energy diminishes with use

• Energy can be created and destroyed

• Energy is always increasing

How are energy and matter related according to Albert Einstein?

• They are completely separate entities

• They are interchangeable

• Energy is a type of matter

• Matter is a form of energy

What is the result of removing heat from a gas according to the text?

• It expands

• It becomes a solid directly

• It evaporates

• It may form a liquid