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1. Most digested food is absorbed in the
D) Small intestine.
Small intestine is the active part of the intestine that participates in absorption of nutrients
and minerals in large amounts.
Stomach is a digestive organ with digestive juices, so absorption doesnot take place.
Esophagus is a narrow channel that allow food to pass from mouth to stomach. Large
intestine is large bowl that absorbs only water.
2. During digestion, foods do not pass through the
A) Liver.
Liver is not the part of digestive system. It is one of the large gland that secretes many
useful enzymes into the blood stream.
Esophagus, stomach, and large intestine are the parts of digestive system that allow
passage of food.
3. Mayonnaise is an example of
Answer: C) Fat
Mayonnaise is a thick creamy sauce, which is often used as a supplement of fat or
cholesterol.
4. Tapeworm has no digestive system.
Answer is B.
5. Enzymes and ____ may work together to form an ulcer.
Answer is D) Fat
6. The inside surface area of the small intestine is increased by the presence of
Answer is B) Villi
Villi are small invaginations on the wall of small intestine that increases the area of absorption of
food materials.
7. Digestion is the breaking down of food into small, usable
Answer is A) Molecules
8) The length of the human digestive system is about
Answer is C) 700 cm (approx 670 cm to 760 cm)
9) A long digestive system is usually found in animals that eat only
Answer C) Plants or autotrophs
The animals that eat plants are called herbivores (like cow, goat, sheep etc), which have a long
and coiled type of digestive system. It is necessary to digest and observe highly complex
carbohydrates. Whereas carnivores (flesh eating animals) will have short digestive system to
digest high calorie proteins.
10) Chewing food to break it into smaller pieces is a physical change.
Answer is B) Physical change
11) The salivary gland
Answer is C) Makes chemicals that digest only carbohydrates like starch to maltose.
12) The pancreas
Answer is E) Makes chemical that digest fat, protein, and carbohydrate
13) The liver
Answer is A) makes chemical that digest only fat to fatty acids.
The liver breakdown of insulin and other hormones. It glucoronidates bilirubin, facilitating its
excretion into bile. It breaks down or modifies toxic substances (e.g., methylation) and most
medicinal products in a process called drug metabolism. This sometimes results intoxication,
when the metabolite is more toxic than its precursor. Preferably, the toxins are conjugated to
avail excretion in bile or urine. It converts ammonia to urea (urea cycle).
14) The stomach
Answer is B) makes chemicals that digest only proteins
Protein denature takes place in stomach with the help of an enzyme, pepsin.
15) The small intestine
Answer is D) makes chemical that digest proteins and fats
16) The large intestine
Answer is F) makes no chemical that digest food.
17) Referring to the diagram, below are the labeled parts
A. Mouth palate
B. Liver
C. Small intestine
D. Large intestine
E. Stomach
F. Pancreas
18) Referring to the fig. in question 17, which is the pancreas?
Answer is F) Pancreas
19) Referring to the fig. in Question 17, which makes bile?
Answer is E) Liver produce bile
20) Referring to the fig. in Question 17, which removes water from undigested food?
Answer is D) Large intestine remove water from undigested food
21) Referring to the fig. in Question 17, which is the large intestine?
Answer is D) Large intestine
22) Referring to the fig. in Question 17, which makes an acid?
Answer is (C) Stomach produces acidic digestive enzyme like HCL
23) Referring to the fig. in Question 17, which makes three enzymes?
Answer is F) Pancreas produces three enzymes like Amylase, lipase and trypsin
24) Referring to the fig. in Question 17, which is the stomach?
Answer is E) Stomach
25) Referring to the fig. in Question 17, which is where carbohydrates are first chemically
changed?
Answer is F) Pancreas digest carbohydrates with the help of amylase
26) Referring to the fig. in Question 17, which is where villi are located?
Answer is (C) Small intestine. The internal wall of the small intestine is made up of microvilli
that increase the surface area of absorption of food.
27) The ________has specialized organs for digestion.
Answer is A) hydra
28) The ____ has no digestive system.
Answer is C) Tapeworm (intestinal parasites)
29) The ___has single opening that serves as both mouth and anus
Answer is A) hydra
30) The ____ has two openings to the digestive system.
Answer is (C) Earthworm.
31) Changes brought about by bile are a
Answer is B) chemical change
32) Changes brought about by the teeth are a
answer is A) physical change
33) Changes brought about by enzymes are a
Answer is B) Chemical changes.
34) Changes brought about when starch is digested to glucose are a
Answer is (A) Physical change
35) The pancreas empties its enzymes into the
Answer is B) small intestine
36) The salivary gland empty their enzymes into the
Answer is D) Mouth
37) The gallbladder empties its chemicals into the
Answer is D) neither a nor b is correct. The correct answer is Small intestine.
38) Food spends most of its time in the
Answer is D) Stomach
39) Food spends the least amount of time in the
Answer is C) esophagus
40) The small intestine, when compared with the large intestine, is
Answer is D) both b and C are correct.
41) Heart burn is caused by acid moving from the stomach into the
Answer is (D) small intestine.
42) A covering of ____usually protects the lining of the stomach and intestine against the action
of acids and enzymes.
Answer is (B) Mucus
43) The mouth helps in the chemical changing of fats.
Answer is B) False
44) A chemical that speeds up the chemical change of food is called an enzyme.
Answer is A) True.
45) Bile helps in the digestion of protein.
Answer is A) True.
46) The breakdown of food into usable molecules is a chemical change.
Answer is B) False. It is physical change.
47) Digestion is the changing of food into a usable form.
Answer is A) True
48) Glucose molecules result from protein digestion
Answer is B) False