WorksheetsDigestive System Quiz Chapter 17
Total questions: 85
Worksheet time: 43mins
What is the main function of mechanical digestion?
To change the chemical composition of food
To break down large pieces of food into smaller ones
To use enzymes to break down food particles
To absorb nutrients into the bloodstream
Which process uses enzymes to break down food particles?
Mechanical digestion
Chemical digestion
Absorption
Propulsion
What does the digestive system consist of?
Only the alimentary canal
Only accessory organs
The alimentary canal and accessory organs
Only the stomach and intestines
Which of the following is NOT a function of the digestive system?
Ingestion
Propulsion
Respiration
Absorption
What are the two main portions of the digestive system?
Alimentary canal and accessory organs
Alimentary canal and respiratory system
Accessory organs and circulatory system
Respiratory system and circulatory system
Which of the following organs is part of the alimentary canal?
Liver
Stomach
Pancreas
Gallbladder
What is the primary function of accessory organs in the digestive system?
To transport food
To empty secretions into the alimentary canal
To absorb nutrients
To break down food mechanically
Which of the following is NOT an accessory organ of the digestive system?
Salivary glands
Liver
Esophagus
Pancreas
What is the innermost layer of the alimentary canal wall?
Submucosa
Muscularis (externa)
Mucosa
Serosa
Which layer of the alimentary canal wall contains blood and lymphatic vessels, nerves, and glands?
Mucosa
Submucosa
Muscularis (externa)
Serosa
What is the function of the muscularis (externa) layer in the alimentary canal wall?
Absorbs dietary nutrients
Nourishes cells
Moves tube and food materials
Eliminates friction
Which layer of the alimentary canal wall is responsible for eliminating friction?
Mucosa
Submucosa
Muscularis (externa)
Serosa
What are the two types of movement in the alimentary canal?
Mixing and Propelling movements
Rotating and Sliding movements
Contracting and Expanding movements
Pushing and Pulling movements
Which type of movement in the alimentary canal does not move materials in one direction?
Mixing movements
Propelling movements
Peristalsis
Rotating movements
What is an example of a mixing movement in the alimentary canal?
Segmentation in the small intestine
Peristalsis in the esophagus
Swallowing in the throat
Absorption in the stomach
What is peristalsis?
A ring of contraction that progresses down the tube, propelling food in a wavelike motion
A rhythmic contraction of muscles in small sections
A process of absorbing nutrients in the small intestine
A method of breaking down food in the stomach
What is the first part of the alimentary canal?
Stomach
Esophagus
Mouth
Intestine
What process involves the mechanical breakdown of solid particles and mixing them with saliva?
Digestion
Ingestion
Mastication
Absorption
Which of the following is NOT a function of the mouth?
Organ of speech
Sensory reception
Absorption of nutrients
Ingestion of food
What structures surround the mouth?
Teeth, gums, uvula
Lips, cheeks, tongue, palate
Tongue, tonsils, esophagus
Palate, uvula, pharynx
What structures surround the mouth?
Lips
Ears
Nose
Eyes
What is the primary function of the papillae on the tongue?
Connects the tongue to the floor of the mouth
Projections that move food, contain taste buds
Lymphatic tissue masses on root of tongue
Occupies the floor of the mouth
What connects the tongue to the floor of the mouth?
Papillae
Lingual tonsils
Lingual frenulum
Epiglottis
What are the lingual tonsils?
Projections that move food, contain taste buds
Lymphatic tissue masses on root of tongue
Connects tongue to floor of mouth
Occupies the floor of the mouth
What are the hardest structures in the body?
Bones
Muscles
Teeth
Cartilage
How many primary (deciduous) teeth do humans have?
32
20
28
24
Which type of teeth are used for biting?
Molars
Canines
Incisors
Premolars
What covers the crown of a tooth?
Dentin
Cementum
Enamel
Pulp
What is the role of the periodontal ligament?
Covers the crown
Holds the root in place
Makes up most of the tooth
Increases surface area for enzyme contact
What is the primary function of saliva in the mouth?
To dry food particles
To dissolve food so it can be tasted
To increase food acidity
To harden food particles
Which enzyme is secreted by the parotid glands?
Lipase
Amylase
Protease
Lactase
What is the role of bicarbonate ions in saliva?
To increase acidity
To keep pH favorable for enzyme activity
To dry the mouth
To harden teeth
Where are the submandibular glands located?
Under the tongue
Floor of the mouth
Behind the ears
On the cheeks
What type of cells produce a watery fluid containing salivary amylase?
Mucous cells
Serous cells
Goblet cells
Parietal cells
What is the function of amylase in salivary secretions?
Splits proteins into amino acids
Splits starch and glycogen into disaccharides
Splits fats into fatty acids
Splits nucleic acids into nucleotides
What do mucous cells secrete?
Salivary amylase
Hydrochloric acid
Mucus
Pepsin
What is the role of mucus in the digestive process?
Breaks down proteins
Binds food particles and lubricates food while swallowing
Absorbs nutrients
Neutralizes stomach acid
What is the primary function of the pharynx and esophagus?
Food digestion
Swallowing
Nutrient absorption
Enzyme production
Which part of the pharynx is responsible for air passage and contains openings to auditory tubes?
Oropharynx
Laryngopharynx
Nasopharynx
Esophagus
Where does the esophagus extend from and to?
From the mouth to the stomach
From the nasal cavity to the stomach
From the pharynx to the stomach
From the larynx to the stomach
Which part of the pharynx is a passageway to the esophagus?
Nasopharynx
Oropharynx
Laryngopharynx
Esophagus
What is the first stage of swallowing called?
Voluntary stage
Involuntary stage
Reflex stage
Peristaltic stage
During the second stage of swallowing, what action protects the nasal cavity from food?
The soft palate and uvula rise
The hyoid bone and larynx elevate
The epiglottis closes
Peristaltic waves occur
What is the role of peristalsis in the swallowing mechanism?
Transports food in the esophagus to the stomach
Mixes saliva with chewed food
Protects the trachea
Elevates the larynx
Which structure closes off the top of the larynx to protect the trachea during swallowing?
Epiglottis
Uvula
Hyoid bone
Soft palate
What is the shape and approximate length of the stomach?
J-shaped, 25 to 30 centimeters long
S-shaped, 15 to 20 centimeters long
U-shaped, 10 to 15 centimeters long
L-shaped, 20 to 25 centimeters long
Where is the stomach located in relation to the diaphragm?
Superior to the diaphragm
Inferior to the diaphragm
Anterior to the diaphragm
Posterior to the diaphragm
What are rugae in the stomach?
Layers of muscle
Folds of mucosa and submucosa
Types of digestive enzymes
Sections of the esophagus
Which of the following is NOT a function of the stomach?
Receives food from the esophagus
Initiates protein digestion
Absorbs most nutrients
Moves food into the small intestine
What are the layers of smooth muscle in the stomach?
Inner circular, outer longitudinal, oblique fibers
Inner longitudinal, outer circular, transverse fibers
Inner oblique, outer circular, longitudinal fibers
Inner transverse, outer longitudinal, circular fibers
What effect do sympathetic impulses have on gastric activity?
Increase gastric activity
Decrease gastric activity
No effect on gastric activity
Stimulate gastric motility
Which hormone is responsible for inhibiting hydrochloric acid secretion?
Gastrin
Cholecystokinin (CCK)
Somatostatin
Histamine
What is the role of parasympathetic impulses in gastric secretion?
Decrease gastric activity
Increase gastric activity
Inhibit histamine release
Decrease gastric motility
Which hormone is released by small intestine cells when proteins and fat enter the small intestine?
Gastrin
Somatostatin
Cholecystokinin (CCK)
Histamine
What is the semifluid paste produced by the mixing of food in the stomach with gastric juice called?
Bile
Chyme
Mucus
Saliva
What action do peristaltic waves perform in the stomach?
Push chyme toward the pylorus of the stomach
Mix chyme with bile
Absorb nutrients
Produce gastric juice
What prevents the backflow of chyme into the esophagus?
Pyloric sphincter
Lower esophageal sphincter
Duodenum
Gastric folds
What does the rate of emptying from the stomach depend on?
Temperature of the chyme
Consistency of chyme and type of food
Amount of gastric juice
Size of the stomach
What initiates the enterogastric reflex when chyme starts to fill the duodenum?
Gastric glands
Stretch receptors
Peristaltic waves
Esophageal sphincter
What type of gland is the pancreas when it secretes insulin and glucagon?
Exocrine gland
Endocrine gland
Salivary gland
Sebaceous gland
What is the function of pancreatic acinar cells?
Secrete bile
Release pancreatic juice
Produce insulin
Absorb nutrients
Where does the pancreatic duct empty its contents?
Stomach
Large intestine
Duodenum
Esophagus
What is the role of the hepatopancreatic sphincter?
Controls blood sugar levels
Regulates bile and pancreatic juice movement
Produces digestive enzymes
Absorbs nutrients
What is the largest internal organ in the human body?
Heart
Brain
Liver
Kidney
Where is the liver located in the human body?
Lower-left abdominal quadrant
Upper-right abdominal quadrant
Lower-right abdominal quadrant
Upper-left abdominal quadrant
What color is the liver described as?
Yellow
Blue
Reddish-brown
Green
Which of the following statements is true about the liver?
It is poorly supplied with blood vessels.
It is well-supplied with blood vessels.
It is located in the lower-left abdominal quadrant.
It is the smallest internal organ.
How many lobes does the liver have?
2
3
4
5
Which lobe of the liver is the largest?
Left lobe
Quadrate lobe
Caudate lobe
Right lobe
Where is the quadrate lobe of the liver located?
Near the inferior vena cava
Near the gallbladder
Around the central vein
Between plates of cells
What are hepatic sinusoids?
Liver cells
Channels for blood, between plates of cells
Absorbed nutrients
Oxygen-rich blood
What is the function of the hepatic portal vein?
Brings oxygen-rich blood
Brings absorbed nutrients to sinusoids
Contains liver cells
Flows from ductules to hepatic ducts
What is the primary function of the liver in detoxification?
Removes toxins from the blood
Stores vitamins and minerals
Produces bile
Synthesizes plasma proteins
Which process is involved in carbohydrate metabolism in the liver?
Oxidizes fatty acids
Polymerizes glucose to glycogen
Deaminates amino acids
Produces and secretes bile
What does the liver do during lipid metabolism?
Forms urea
Stores glycogen
Oxidizes fatty acids
Removes damaged blood cells
In protein metabolism, what is one of the liver's functions?
Converts noncarbohydrates to glucose
Synthesizes lipoproteins
Deaminates amino acids
Stores iron
What does the liver store as part of its storage function?
Toxins
Bile
Glycogen, vitamins A, D, and B₁₂, iron, and blood
Fatty acids
How does the liver contribute to blood filtering?
Produces bile
Removes damaged blood cells and foreign substances
Synthesizes cholesterol
Converts amino acids
What is the liver's role in secretion?
Stores vitamins
Produces and secretes bile
Degrades hormones
Synthesizes phospholipids
Where is the gallbladder located?
On the superior surface of the liver
On the inferior surface of the liver
Inside the pancreas
Next to the stomach
What is the function of the cystic duct?
It stores bile
It is the only entry/exit duct, merging with the common hepatic duct to form the common bile duct
It releases bile into the stomach
It produces bile
What does the gallbladder store and concentrate?
Blood
Enzymes
Bile
Hormones
What regulates the release of bile into the duodenum?
Hepatopancreatic sphincter
Cystic duct
Common bile duct
Cholecystokinin
What can cause the formation of gallstones?
Low bile concentration
Excess bile concentration, too much cholesterol secretion by liver, or inflammation of the gallbladder
High enzyme levels
Low cholesterol levels
Which hormone controls the release of bile from the gallbladder?
Insulin
Glucagon
Cholecystokinin
Adrenaline
