120 Questions
Which of the following is NOT an accessory organ of digestion?
Stomach
What is the primary purpose of mechanical digestion?
To break down food into smaller particles
Which type of macronutrient is broken down into glycerol and fatty acids during digestion?
Lipids
Which of the following is a function of saliva produced by the salivary glands?
Digestion of carbohydrates using salivary amylase
Where does the swallowed food travel after leaving the pharynx?
Esophagus
What is the main function of the digestive system?
To break down food into nutrients that can be absorbed by the body
Which of the following is NOT an organ of the alimentary canal?
Liver
Which type of digestion occurs in the mouth?
Both mechanical and chemical digestion
What is the primary function of saliva in the mouth?
To break down carbohydrates
What is the role of the esophagus in the digestive system?
To transport food from the pharynx to the stomach
Which organ stores and concentrates bile produced by the liver?
Gallbladder
What is the primary function of the stomach?
Mechanical and chemical digestion of food, primarily proteins
Which organ produces digestive enzymes that help break down carbohydrates, fats, and proteins in the small intestine?
Pancreas
Which part of the digestive system is responsible for the initial breakdown of carbohydrates and lubrication of food for easier swallowing?
Salivary glands
What are the three parts of the small intestine?
Duodenum, jejunum, and ileum
Which of the following is NOT an accessory organ in the oral cavity?
Stomach
What is the primary function of the salivary glands?
All of the above
Which of the following is NOT a salivary gland?
Pharyngeal gland
What is the role of the parasympathetic nervous system in saliva production?
It stimulates saliva production
Which of the following statements about the oral cavity is NOT true?
It is technically part of the alimentary canal
Which of the following is an accessory organ of digestion?
Pancreas
What is the primary purpose of reverse peristalsis (vomiting)?
To expel harmful substances
Which part of the small intestine is responsible for producing the hormones secretin and cholecystokinin?
Duodenum
What is the primary function of the brush border enzymes found in the small intestine?
To break down carbohydrates and proteins
What is the primary function of the villi in the small intestine?
To absorb nutrients
Which of the following is NOT a function of saliva?
Breaking down proteins
What is the optimal pH range for salivary amylase activity?
6.5 - 7.0
Which enzyme in saliva helps protect against bacterial infections in the oral cavity and stomach?
Lysozyme
Which of the following is the primary component of saliva?
Water
Where does the initial breakdown of carbohydrates by salivary amylase begin?
Mouth
What is the primary function of bicarbonate in digestion?
Neutralizing acidic chyme from the stomach.
What is the role of CCK (cholecystokinin) in the digestive system?
Sending bile to the gallbladder for storage.
Which enzyme is responsible for breaking down proteins into smaller peptides?
Trypsin
What is the function of emulsification in digestion?
Breaking down large fat droplets into smaller ones.
Which organ produces bile and sends it to the gallbladder for storage?
Liver
What is the main function of trypsin in digestion?
Aiding in protein digestion.
Where does bile break down fat droplets into smaller particles through emulsification?
Jejunum
What is the function of pancreatic amylase in digestion?
Breaking down complex carbohydrates.
Why does tryosinogen need to be activated into trypsin?
It is an inactive enzyme that needs activation for protein digestion.
What is the role of chymotrypsin in digestion?
Aiding in protein digestion by breaking down proteins into smaller peptides.
What is the primary function of salivary amylase in digestion?
Break down carbohydrates into glucose
Which accessory organ of digestion attaches the tongue to the floor of the mouth?
Lingual Frenulum
Where does the initial breakdown of lipids into glycerol and fatty acids occur in the digestive system?
Small Intestine
Which organ of the alimentary canal is responsible for the physical breakdown of food through muscular contractions and chewing?
Mouth
What is the primary function of lysozyme in saliva?
Protect against bacterial infections
Which of the following is NOT an accessory organ of the digestive system?
Stomach
What is the primary function of the salivary glands in the oral cavity?
Lubrication and initiation of carbohydrate digestion
Which of the following enzymes found in saliva helps protect against bacterial infections?
Lysozyme
What is the primary function of mechanical digestion?
Breaking down food into smaller particles
Which of the following organs is responsible for the initial breakdown of carbohydrates and lubrication of food for easier swallowing?
Oral cavity
Which organ is responsible for the production of bile to aid in the digestion and absorption of fats in the small intestine?
Gallbladder
Where does most of the digestion and absorption of nutrients occur in the digestive system?
Small Intestine
In which part of the digestive system does the breakdown of carbohydrates, fats, and proteins occur primarily through enzymatic action?
Pancreas
What is the primary function of salivary glands in digestion?
Initiates breakdown of carbohydrates in the mouth
Where does the storage of feces occur until they are expelled during defecation?
Rectum
Which of the following accurately describes the function of the stomach?
Initiates the chemical breakdown of proteins and fats
Which of the following is NOT a function of saliva?
Neutralizing stomach acid to protect the esophagus
Which organ is considered an accessory organ of digestion, but NOT part of the alimentary canal?
Pancreas
Which of the following statements about the pharynx is correct?
It is a common passage for both air and food, located behind the mouth
Which type of digestion occurs in the mouth?
Both mechanical and chemical digestion
Which of the following is NOT a function of saliva?
Neutralizing stomach acid
Which enzyme in saliva helps break down complex carbohydrates?
Salivary amylase
What is the optimal pH range for salivary amylase to function effectively?
6.5 - 7.5
Which organ does the swallowed food travel through after leaving the pharynx?
Esophagus
Which of the following statements about the oral cavity is true?
It initiates the breakdown of carbohydrates through salivary amylase.
Which of the following is responsible for the initial breakdown of carbohydrates in the mouth?
Salivary amylase
What is the primary function of the gallbladder?
Store and concentrate bile produced by the liver
Which of the following is NOT a function of saliva?
Producing bile for fat digestion
Which of the following is NOT an accessory organ of the digestive system?
Esophagus
What is the primary function of the villi in the small intestine?
Increase surface area for nutrient absorption
Which of the following is an accessory organ of the digestive system?
Liver
What is the primary function of the gallbladder in the digestive system?
To store and concentrate bile produced by the liver
What is the main role of $ ext{trypsin}$ in the digestive process?
To break down proteins into smaller peptides
What is the primary function of $ ext{salivary amylase}$ in the digestive process?
To begin the breakdown of complex carbohydrates into simpler sugars
Which type of digestion primarily occurs in the mouth?
Both mechanical and chemical digestion
Where does the swallowed food travel after leaving the pharynx?
Esophagus
What is the primary function of the stomach in the digestive system?
To mix and break down food through mechanical and chemical digestion
Which part of the small intestine is responsible for producing the hormones $ ext{secretin}$ and $ ext{cholecystokinin}$ (CCK)?
Duodenum
What is the primary function of $ ext{emulsification}$ in the digestive process?
To break down fat droplets into smaller particles for easier digestion and absorption
Which of the following is NOT a function of $ ext{saliva}$ in the oral cavity?
Absorption of nutrients from the food
What role does the parasympathetic nervous system play in saliva production within the oral cavity?
Stimulates saliva production
Which part of the digestive system is responsible for lubricating food for easier swallowing?
Pharynx
What is the function of lysozyme in saliva?
Killing bacteria in the oral cavity
Which organ is NOT considered an accessory organ of digestion?
Tongue
Where does most of the digestion and absorption of nutrients occur in the digestive system?
Small Intestine
Which structure increases the surface area for nutrient absorption in the small intestine?
Villi and microvilli
What is the function of lysozyme in saliva?
Kills bacteria in the mouth
Which organ is responsible for transporting food from the pharynx to the stomach through peristalsis?
Esophagus
Where does the final absorption of nutrients into the bloodstream occur?
Small intestine
What is the primary function of chyme in the digestive process?
Deliver partially digested food to the small intestine
Where does the storage and concentration of bile occur before it is released into the small intestine to aid in fat digestion?
Gallbladder
Which of the following is NOT an accessory organ of the digestive system?
Lungs
Which organ is primarily responsible for producing digestive enzymes to break down carbohydrates, fats, and proteins in the small intestine?
Pancreas
During which part of the digestive process does saliva, containing enzymes like amylase, aid in the initial breakdown of carbohydrates?
Pharynx
Where does the initial breakdown of carbohydrates by salivary amylase begin?
Mouth
Which organ stores feces until they are expelled through the anus during defecation?
Rectum
What is the primary function of salivary amylase in the digestive process?
To break down carbohydrates into simpler sugars
Which of the following is an accessory organ of the digestive system?
Pancreas
What is the primary function of salivary amylase in the digestive process?
Initiating breakdown of carbohydrates
Which enzyme in saliva helps protect against bacterial infections in the oral cavity and stomach?
Lysozyme
What is the main function of lingual frenulum in the oral cavity?
To attach the tongue to the floor of the mouth
Which of the following is NOT considered an accessory organ of the digestive system?
Tongue
Where does mechanical digestion primarily occur in the digestive system?
Mouth
What is the primary function of the salivary glands in the oral cavity?
To lubricate food for easier swallowing
Which enzyme found in saliva is responsible for breaking down carbohydrates into smaller molecules?
Salivary amylase
What is the primary function of the esophagus in the digestive system?
To transport food from the mouth to the stomach
Which type of digestion occurs primarily in the mouth?
Mechanical digestion
What is the primary function of the enzyme $ext{lysozyme}$ found in saliva?
To protect against bacterial infections
Which part of the small intestine is responsible for nutrient absorption?
Jejunum
Which part of the small intestine is responsible for producing the hormones $ext{secretin}$ and $ext{cholecystokinin}$ (CCK)?
Duodenum
Which of the following is NOT an accessory organ of the digestive system?
Kidneys
What is the primary function of $ext{emulsification}$ in the digestive process?
To break down fat droplets into smaller particles for easier digestion and absorption
Which enzyme in saliva helps protect against bacterial infections in the oral cavity and stomach?
Lysozyme
Where does bile break down fat droplets into smaller particles through emulsification?
In the duodenum
What is the main role of $ext{trypsin}$ in the digestive process?
To activate other enzymes like chymotrypsin
What is the primary function of the salivary glands in the oral cavity?
To produce saliva that contains enzymes for digestion
What is the primary function of $ext{salivary amylase}$ in digestion?
To break down complex carbohydrates into simpler sugars
Which organ is considered an accessory organ of digestion, but NOT part of the alimentary canal?
Liver
Where does most of the digestion and absorption of nutrients occur in the digestive system?
In the small intestine
What is the primary function of the pharynx in the digestive system?
To facilitate the passage of food from the mouth to the esophagus
Learn about the key organs involved in the human digestive system such as the stomach, small intestine, large intestine (colon), and rectum. Understand their functions in the digestion and absorption of nutrients.
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