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Human Digestive System Organs

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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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