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IB BIOLOGY HL Digestion

Total questions: 40

Worksheet time: 1hrs 18mins

Name
Class
Date
1.
The digestive system is also commonly referred to as the:
a)
Digestive Liver
b)
Alimentary Canal
c)
Pancreas
d)
Excretory System
2.
Which type of digestion involves the physical breakdown of food into smaller pieces for example by using bile.
a)
Mechanical Digestion
b)
Chemical Digestion
3.
Bile is made by which digestive organ?
a)
Gallbladder
b)
Stomach
c)
Rectum
d)
Liver
4.
Which digestive organ makes digestive juices to help the small intestine absorb nutrients?
a)
Liver
b)
Gallbladder
c)
Pancreas
d)
Esophagus
5.
Nutrients from digested food are absorbed in which digestive organ?
a)
Small Intestine
b)
Stomach
c)
Large Intestine
d)
Gallbladder
6.
Bile is stored in which secondary digestive organ?
a)
Stomach
b)
Liver
c)
Gallbladder
d)
Pancreas
7.
What is the substance found in the stomach that allows for chemical digestion to take place?
a)
Gastric Juices
b)
Saliva
c)
Bile
8.
Most chemical digestion takes place in which organ?
a)
Stomach
b)
Small intestine
c)
Rectum
d)
Esophagus
9.
The process by which the body breaks down food so that it can be used for energy.
a)
Digestion
b)
Respiration
c)
Circulation 
d)
Absorb
10.
Movement of food via involuntary muscle contractions is known as...
a)
Peristalsis
b)
Esophagus
c)
Rectum
d)
Large intestine
11.
What is the path of the digestive system?
a)
Mouth, Esophagus, Stomach, Small Intestines, Large Intestines, Anus
b)
Anus, Esophagus, Stomach, Large Intestine, Small Intestine, Mouth
c)
Mouth, Esophagus, Small Intestine, Stomach, Large Intestine, Anus
d)
Mouth, Esophagus, Stomach, Large Intestine, Small Intestine, Anus
12.
Which organ pushes food down to the stomach via involuntary muscle contractions?
a)
Mouth
b)
Esophagus
c)
Rectum
d)
Large intestine
13.
The opening at the end of the digestive track where feces exit the body.
a)
Anus
b)
Mouth
c)
Intestine 
d)
Stomach
14.
Number 4 is pointing to the....
a)
Anus
b)
Rectum
c)
Large Intestine
d)
Small intestine
15.
Number 5 is pointing to the...
a)
Liver
b)
Gallbladder
c)
Pancreas
d)
Stomach
16.
Number 3 is pointing to the...
a)
Small intestine
b)
Rectum
c)
Large intestine
d)
Stomach
17.
Number 2 is pointing to the...
a)
Esophagus
b)
Stomach
c)
Small intestine
d)
Anus
18.
The enzyme found in saliva and the small intestine that breaks down carbohydrates
a)
Amylase
b)
Protease
c)
Lipase
19.
The enzyme secreted by the pancreas that breaks down fats and oils
a)
Amylase
b)
Protease
c)
Lipase
20.
The enzyme secreted by the pancreas that breaks down proteins
a)
Amylase
b)
Protease
c)
Lipase
21.

Which layer of the digective tract is in direct contact with the food that is consumed?

a)

mucosa

b)

muscularis

c)

submucosa

d)

serosa or adventitia

22.

The tongue

a)

holds food in place during mastication

b)

is involved in speech

c)

assists in swallowing

d)

is a major sensory organ for taste

e)

all of the above

23.

Which of these glands secrete saliva into the oral cavity

a)

parotid glands

b)

submandibular glands

c)

sublingual glands

d)

all of the above

24.

Which of these stomach cell types is NOT correctly matched with its function?

a)

surface mucous cells: produce mucus

b)

parietal cells: produce hydrochloric acid

c)

chief cells: produce intrinsic factor

d)

endocrine cells: produce regulatory hormones

25.

Which of these structures function to increase the mucosal surface of the small intestine?

a)

circular folds

b)

villi

c)

microvilli

d)

all of the above

26.

Given these parts of the small intestine:

  1. duodenum
  2. ileum
  3. jejunum


Choose the arrangement that lists the parts in the order food encounters them as the food passes through the small intestine

a)

1,2,3

b)

1,3,2

c)

2,1,3

d)

2,3,1

27.

The hepatic sinusoids

a)

receive blood from the hepatic artery

b)

receive blood from the hepatic portal vein

c)

empty into the central veins

d)

all of the above

28.

The portion of the digestive tract in which digestion begins is the

a)

oral cavity

b)

esophagus

c)

stomach

d)

duodenum

e)

jejunum

29.

Why doesn't the stomach digest itself

a)

the stomach wall isnt composed of protein, so there are no digestive enzymes to attack it

b)

the digestive enzymes in the stomach aren't strong enough

c)

the lining of the stomach is too tough to be attacked by digestive enzymes

d)

the stomach wall is protected by large amounts of mucus

30.

During swallowing

a)

movement of food is primarily caused by gravity

b)

pharyngeal constrictor muscles push the food into the esophagus

c)

food is pushed into the esophagus during the voluntary phase

d)

the soft palate closes off the opening into the larynx

31.

Which of these hormones stimulates stomach secretions?

a)

cholecystokinin

b)

gastric inhibitory peptide

c)

gastrin

d)

secretion

32.

Which of these phases of stomach secretion is correctly matched?

a)

Cephalic phase: the largest volume of secretion is produced

b)

Gastric phase: gastrin secretion is inhibited by distention of the stomach

c)

Gastric Phase: initiated by chewing, swallowing or thinking of food

d)

Intestinal phase (pH 2.0 or below): stomach secretions are inhibited

33.

The function of peristaltic waves in the stomach is to

a)

move chyme into the small intestine

b)

increase the secretion of HCl

c)

empty the teniae coli

d)

all of the above

34.

Which of these would occur if a person suffered from a severe case of hepatitis that impaired liver function?

a)

Fat digestion may be hampered

b)

Bile pigments may accumulate in the blood

c)

Blood proteins may decrease in concentration

d)

b and c

e)

all of the above

35.

The watery solution produced by the exocrine cells in the pancreas

a)

is secreted by the pancreatic islets

b)

contains bicarbonate ions

c)

is released primarily in response to cholecystokinin

d)

all of the above

36.

The breakdown products of carbohydrate digestion are

a)

monosaccharides

b)

amino acids

c)

glycerol

d)

fatty acids

37.

The enzyme responsible for the digestion of carbohydrates is produced by the

a)

salivary glands and pancreas

b)

stomach and pancreas

c)

pancreas and liver

d)

liver and small intestines

38.

Bile salts

a)

are made by the gallbladder

b)

contain breakdown products from hemoglobin

c)

emulsify fats

d)

are enzymes that digest fats

39.

Two enzymes involved in the digestion of proteins are

a)

pepsin and lipase

b)

trypsin and hydrochloric acid

c)

pancreatic amylase and bile salts

d)

pepsin and trypsin

40.

Given these processes:

1. chyle carried to bloodstream

2. emulsification of fats

3. formation of micelles

4. lipids enter lacteals

5. lipids packaged in a protein coat


Arrange the processes in the correct order as fats are digested, absorbed, and transported in the body

a)

1,2,3,4,5

b)

1,2,4,3,5

c)

2,3,4,5,1

d)

2,3,5,1,4

e)

2,3,5,4,1

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