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WorksheetsCH. 18 Test
Total questions: 20
Worksheet time: 40mins
Name
Class
Date
1.
Imagine eating a biscuit. Chewing it into smaller pieces is mechanical digestion. How does this process compare to the stomach's chemical digestion of the same biscuit?
a)
Both primarily involve changing food into a watery liquid.
b)
Both processes use enzymes to break down food.
c)
Chewing uses physical force; chemical digestion uses solutions and enzymes.
d)
Chewing happens only in the mouth; chemical digestion only in the small intestine.
2.
What is the primary characteristic of mechanical digestion in the digestive system?
a)
Enzymes speed up reactions.
b)
Food is chewed, mixed, and churned.
c)
Chemical reactions break down food.
d)
Small molecules are absorbed by blood.
3.
Which of the following is classified as an accessory organ of the digestive system?
a)
Esophagus
b)
Liver
c)
Stomach
d)
Large intestine
4.
A person struggles to digest complex carbohydrates. This suggests a potential issue with the body's production of which digestive component?
a)
Muscle contractions
b)
Enzymes
c)
Villi structure
d)
Saliva volume
5.
What is the main function of enzymes in the human body's digestive process?
a)
To speed up chemical reactions.
b)
To make food taste better.
c)
To store energy as fats.
d)
To absorb water from food.
6.
What is the specific role of peristalsis as food moves through the esophagus?
a)
To change food into a soft mass using saliva.
b)
To move food to the stomach using muscle contractions.
c)
To absorb nutrients into the blood.
d)
To break down food chemically.
7.
What is the term for the thin, watery liquid that food becomes after digestion in the stomach?
a)
Saliva
b)
Enzyme
c)
Chyme
d)
Nutrient
8.
How do villi in the small intestine contribute to nutrient absorption?
a)
They slow down peristalsis.
b)
They create digestive enzymes.
c)
They increase the surface area.
d)
They absorb water from chyme.
9.
A doctor advises limiting antibiotic use for minor infections to protect gut health. Evaluate this advice using information about digestive system bacteria.
a)
The advice is partially true but mainly relates to stomach acid.
b)
The advice is irrelevant; digestive bacteria have no known health role.
c)
The advice is sound because antibiotics can harm beneficial vitamin-making bacteria.
d)
The advice is incorrect; antibiotics only affect bad bacteria.
10.
Many people think all bacteria are bad. Based on the text, what is a beneficial role of bacteria in the digestive tract?
a)
They help make vitamins your body needs.
b)
They break down useful vitamins.
c)
They only exist to digest waste.
d)
They cause food poisoning.
11.
What are the primary functions of nutrients in the body, as stated in the text?
a)
To provide energy, growth, and repair materials
b)
To only store excess fat for future use
c)
To break down waste products and toxins
d)
To regulate body temperature and promote sleep
12.
A student is planning a meal and wants to ensure their body cells can be effectively repaired and grown. Which food group should they prioritise to meet this need?
a)
Bread and cereals
b)
Vegetable
c)
Milk
d)
Meat
13.
According to the text, what is identified as the main source of energy for your body?
a)
Fats
b)
Minerals
c)
Proteins
d)
Carbohydrates
14.
If someone consumes foods like fruits, honey, and milk, which type of carbohydrate are they mainly getting, based on the text?
a)
Simple carbohydrates (sugars)
b)
Complex carbohydrates (starch)
c)
Complex carbohydrates (fiber)
d)
Essential carbohydrates
15.
The text mentions "lipids" as another name for which nutrient class?
a)
Minerals
b)
Vitamins
c)
Proteins
d)
Fats
16.
The text states that a well-balanced diet usually provides all necessary vitamins. What can be inferred about diets that are *not* well-balanced regarding vitamin intake?
a)
They are usually higher in minerals.
b)
They might cause immediate severe illness.
c)
They will always require vitamin supplements.
d)
They could lead to vitamin deficiencies.
17.
If someone's body is experiencing issues with chemical reactions and bone strength, which mineral is most likely insufficient based on the text's emphasis?
a)
Potassium
b)
Iron
c)
Sodium
d)
Calcium
18.
A person consistently feels tired and struggles with concentration. Given the body's composition, what common nutrient deficiency might be a factor, and why?
a)
Vitamins, to help prevent disease
b)
Water, because cells need it to carry out their work
c)
Carbohydrates, for quick energy supply
d)
Protein, because it helps with muscle repair
19.
Someone argues that since water is mostly in cells, drinking less water won't affect nutrient absorption as long as they eat healthy food. What information from the text contradicts this misconception?
a)
The human body is about 60 percent water.
b)
Most nutrients must be dissolved in water for absorption.
c)
Water is needed for waste removal.
d)
Water helps maintain internal temperature.
20.
A classmate claims that focusing solely on eating from the "Milk" food group is a healthy strategy because milk contains many nutrients. How should you evaluate this claim using the text?
a)
It is correct because milk is very nutritious.
b)
It is incorrect because no single food has every nutrient.
c)
It is partially correct but needs more specific nutrients.
d)
It is irrelevant as food groups are for selection, not restriction.
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