1
How many dietary calories (C) are there in 1 kilocalorie?
1000 calorie
What are the average dietary calories a teenage female needs in a day?
2200
A digestive system consists of a digestive cavity with one opening.
Incomplete
What are the average dietary calories a teenage male needs in a day?
2800
A digestive system consists of a digestive tract with two openings.
Complete
1-2 liters of water is equivalent to how many cups?
6-8 cups
It is the main source of building blocks for the body?
Protein
It is the main source of energy?
Carbohydrates
It is considered as the most important nutrient.
Water
Fats/lipids
Good fats
Unsaturated fats
The digestive system converts large food molecules into ____.
Simpler molecules/ monomers
It speeds up the chemical digestion/ reaction of foods.
Enzyme
It helps to moisten food and make it easier to chew.
Saliva
It carries food from the mouth to the stomach through contractions of smooth muscles (peristalsis).
Esophagus
It breaks down protein and kills bacteria.
Hydrochloric acid/ pepsin
It is where most of the chemical digestion and absorption of nutrients occurs.
Small intestine
They are accessory organs that help in food digestion.
Liver and pancreas
The finger-like projections on the lining of intestine walls increase the surface area of nutrient absorption.
Villi
It further increases the surface area for absorption.
Microvilli
What is the primary function of the large intestine?
To remove water from the undigested material.
Food is basically nutrient-free water as it leaves the small intestine, why?
Most of the nutrients are absorbed in the small intestine.
What is the primary role of enzymes in digestion?
Speeds up chemical reaction
Why do you needs to chew the food you eat?
To increases the surface area of food.
Why do foods need to be converted into their simpler forms?
For easier absorption