- Which of the following processes is used by animals to break down food into simpler substances?
- A) Photosynthesis
- B) Digestion
- C) Respiration
- D) Transpiration
- Which organ in the human body is primarily responsible for nutrient absorption?
- A) Stomach
- B) Liver
- C) Small intestine
- D) Large intestine
- What is the primary function of the liver in digestion?
- A) To produce bile
- B) To absorb nutrients
- C) To digest proteins
- D) To store vitamins
- Which of the following is a primary function of the large intestine?
- A) Digesting fats
- B) Absorbing water and electrolytes
- C) Producing bile
- D) Breaking down carbohydrates
- In which part of the digestive system does most of the chemical digestion occur?
- A) Mouth
- B) Stomach
- C) Small intestine
- D) Esophagus
- Which enzyme in saliva begins the digestion of carbohydrates?
- A) Pepsin
- B) Amylase
- C) Lipase
- D) Trypsin
- What is the role of the pancreas in digestion?
- A) To produce bile
- B) To secrete digestive enzymes and insulin
- C) To absorb nutrients
- D) To store food
- Which of the following animals uses a rumen to help digest its food?
- A) Cow
- B) Cat
- C) Dog
- D) Bird
- What is the term for the process by which animals convert food into energy?
- A) Respiration
- B) Metabolism
- C) Photosynthesis
- D) Fermentation
- Which organ in the human digestive system produces insulin?
- A) Stomach
- B) Liver
- C) Pancreas
- D) Small intestine
- What is the primary role of the villi in the small intestine?
- A) To absorb nutrients
- B) To secrete digestive enzymes
- C) To store food
- D) To produce bile
- Which type of animal nutrition involves obtaining nutrients from other organisms?
- A) Autotrophic nutrition
- B) Heterotrophic nutrition
- C) Parasitic nutrition
- D) Symbiotic nutrition
- What type of digestion occurs in the mouth?
- A) Mechanical digestion only
- B) Chemical digestion only
- C) Both mechanical and chemical digestion
- D) Absorption
- Which organ is responsible for the production of hydrochloric acid in the digestive system?
- A) Liver
- B) Pancreas
- C) Stomach
- D) Small intestine
- In which digestive organ is bile stored before it is released into the small intestine?
- A) Liver
- B) Stomach
- C) Gallbladder
- D) Pancreas
- Which type of animal primarily uses a beak to break down food?
- A) Mammal
- B) Reptile
- C) Bird
- D) Amphibian
- What is the role of the rectum in the digestive system?
- A) To absorb nutrients
- B) To store feces before excretion
- C) To produce digestive enzymes
- D) To digest proteins
- Which of the following processes helps in the mechanical digestion of food?
- A) Chewing
- B) Absorption
- C) Secretion
- D) Assimilation
- What is the primary function of the appendix in the digestive system?
- A) To aid in digestion
- B) To store waste material
- C) To produce digestive enzymes
- D) To play a role in immune response
- Which of the following is not a function of the digestive system?
- A) Ingestion
- B) Digestion
- C) Absorption
- D) Respiration
- In which part of the digestive system does absorption of most nutrients occur?
- A) Large intestine
- B) Small intestine
- C) Stomach
- D) Esophagus
- Which enzyme is responsible for breaking down proteins into peptides in the stomach?
- A) Amylase
- B) Lipase
- C) Pepsin
- D) Trypsin
- What is the role of bile in the digestion of fats?
- A) To break down fats into smaller droplets
- B) To digest proteins
- C) To absorb nutrients
- D) To neutralize stomach acid
- Which type of digestion involves the action of bile and digestive enzymes?
- A) Mechanical digestion
- B) Chemical digestion
- C) Physical digestion
- D) Absorption
- What is the primary function of the gallbladder?
- A) To produce digestive enzymes
- B) To absorb nutrients
- C) To store and concentrate bile
- D) To break down proteins
- Which digestive process involves the movement of food through the esophagus?
- A) Peristalsis
- B) Churning
- C) Absorption
- D) Filtration
- In which of the following animals does the process of digestion begin in the stomach?
- A) Cow
- B) Human
- C) Bird
- D) Fish
- Which structure in the small intestine increases the surface area for nutrient absorption?
- A) Microvilli
- B) Cilia
- C) Rugae
- D) Villi
- Which of the following is a key function of the digestive system’s accessory organs?
- A) To break down food mechanically
- B) To produce digestive enzymes and bile
- C) To absorb nutrients directly
- D) To store feces
- What is the primary function of the small intestine’s mucosa layer?
- A) To secrete mucus
- B) To absorb nutrients
- C) To store food
- D) To produce bile
- Which part of the digestive system is responsible for the final stages of digestion and water absorption?
- A) Small intestine
- B) Large intestine
- C) Stomach
- D) Liver
- What is the name of the process that involves the breakdown of complex carbohydrates into simple sugars?
- A) Hydrolysis
- B) Fermentation
- C) Decomposition
- D) Osmosis
- Which of the following is a common adaptation for digestion in herbivores?
- A) Sharp teeth for tearing meat
- B) A large cecum or rumen for fermenting plant material
- C) A long, coiled small intestine for extended digestion
- D) A large liver for detoxifying animal proteins
- Which type of digestive system includes a single opening that serves as both mouth and anus?
- A) Complete digestive system
- B) Incomplete digestive system
- C) Open circulatory system
- D) Closed circulatory system
- What is the role of saliva in the digestion of carbohydrates?
- A) To begin the breakdown of starches into maltose
- B) To digest proteins into amino acids
- C) To emulsify fats into smaller droplets
- D) To neutralize stomach acid
- What type of nutrients are broken down by lipase in the digestive system?
- A) Carbohydrates
- B) Proteins
- C) Fats
- D) Vitamins
- Which type of digestive process involves the mechanical breaking down of food into smaller pieces?
- A) Chemical digestion
- B) Mechanical digestion
- C) Enzymatic digestion
- D) Absorption
- Which part of the digestive system has a pH that is highly acidic?
- A) Mouth
- B) Small intestine
- C) Stomach
- D) Large intestine
- Which animal adaptation is primarily responsible for the breakdown of cellulose in plant cell walls?
- A) High acidity in the stomach
- B) A specialized cecum or rumen
- C) Large, sharp teeth
- D) Short digestive tract
- Which of the following processes involves the movement of nutrients from the digestive tract into the bloodstream?
- A) Digestion
- B) Absorption
- C) Excretion
- D) Metabolism
Answer Key
- B) Digestion
- C) Small intestine
- A) To produce bile
- B) Absorbing water and electrolytes
- C) Small intestine
- B) Amylase
- B) To secrete digestive enzymes and insulin
- A) Cow
- B) Metabolism
- C) Pancreas
- A) To absorb nutrients
- B) Heterotrophic nutrition
- C) Both mechanical and chemical digestion
- C) Stomach
- C) Gallbladder
- C) Bird
- B) To store feces before excretion
- A) Chewing
- D) To play a role in immune response
- D) Respiration
- B) Small intestine
- C) Pepsin
- A) To break down fats into smaller droplets
- B) Chemical digestion
- C) To store and concentrate bile
- A) Peristalsis
- B) Human
- A) Microvilli
- B) To produce digestive enzymes and bile
- B) To absorb nutrients
- B) Large intestine
- A) Hydrolysis
- B) A large cecum or rumen for fermenting plant material
- B) Incomplete digestive system
- A) To begin the breakdown of starches into maltose
- C) Fats
- B) Mechanical digestion
- C) Stomach
- B) A specialized cecum or rumen
- B) Absorption