Unit 7D Flashcards
Digestive tract
A series of tubelike organs that are joined end to end
Digestive system
A collection of organs that work together to digest food so that it can be used by the body
What three things does food not go through
Liver, gallbladder, and pancreas
Mechanical digestion
The breaking, crushing, and mashing of food
Chemical digestion
Large molecules are broken down into nutrients
Organic molecules contain…
Carbon hydrogen oxygen
Examples of simple carbs
Fruits, milk, veggies
Carbohydrates involve short term____
Energy storage- fast fuel
Examples of lipids
Fats,oils, waxes
Lipids are broken down into…..
Fatty acids and glycerol
What are the 4 types of organic molecules
Carbohydrates
Lipids
Proteins
Nucleic acids
Lipids are _____ term energy storage
Long
One gram of fat=
9 calories
Lipids are more than ____ times the amount of carbs
2 times
What are proteins broken down into
Amino acids
Proteins are the most ______ and ____ organic molecules
Complex;diverse
Nucleotides contain…
1 phosphate, 1 sugar, 1 base
Saliva
A liquid that contains enzyme that begins the chemical digestion of carbohydrates
Esophagus
A long straight tube that connects the throat to the stomach
Peristalsis forces the _____ into the ________
Food; stomach
Stomach
Muscular bag like organ attached to the lower end of the esophagus
What does mucus cover?
Stomachs lining