Podcast
Questions and Answers
What is the primary function of bile secreted by the liver in frogs?
What is the primary function of bile secreted by the liver in frogs?
- To absorb nutrients in the small intestine.
- To break down carbohydrates into simple sugars.
- To emulsify fats for digestion. (correct)
- To digest proteins into amino acids.
In frogs, where does the final digestion of food primarily occur?
In frogs, where does the final digestion of food primarily occur?
- Intestine (correct)
- Duodenum
- Rectum
- Stomach
What is the name given to the partially digested food that passes from the stomach to the duodenum in frogs?
What is the name given to the partially digested food that passes from the stomach to the duodenum in frogs?
- Bile
- Bolus
- Feces
- Chyme (correct)
Which organ in frogs stores bile, which is produced by the liver?
Which organ in frogs stores bile, which is produced by the liver?
What structural adaptations in the inner wall of the frog's intestine facilitate the absorption of digested food?
What structural adaptations in the inner wall of the frog's intestine facilitate the absorption of digested food?
What two substances are digested thanks to bile and pancreatic juices?
What two substances are digested thanks to bile and pancreatic juices?
What is the role of the pancreas in the digestive system of frogs?
What is the role of the pancreas in the digestive system of frogs?
How does the frog's skin contribute to respiration when it is in the water?
How does the frog's skin contribute to respiration when it is in the water?
What is the correct order of the passage of food through the frog's digestive system?
What is the correct order of the passage of food through the frog's digestive system?
Where does undigested solid waste go before being expelled?
Where does undigested solid waste go before being expelled?
Flashcards
What is the oesophagus?
What is the oesophagus?
A short tube that leads from the pharynx to the stomach.
What is the pancreas?
What is the pancreas?
A digestive gland that produces pancreatic juice containing digestive enzymes.
What is chyme?
What is chyme?
Partially digested food that is passed from the stomach to the duodenum.
What is the duodenum?
What is the duodenum?
First part of the small intestine that receives chyme, bile, and pancreatic juices.
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What is the role of bile?
What is the role of bile?
Emulsifies fats for digestion.
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What are villi and microvilli?
What are villi and microvilli?
Finger-like folds in the inner wall of the intestine that absorb digested food.
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What is the rectum?
What is the rectum?
Final part of the digestive system where undigested solid waste is stored before elimination.
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What is cloaca?
What is cloaca?
A chamber in frogs through which undigested solid waste is passed out.
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Skin acts as...
Skin acts as...
Aquatic respiratory organ in frogs.
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- The figure is a diagrammatic representation of the internal organs of a frog, showing its complete digestive system.
- The digestive system starts with the oesophagus.
- The oesophagus leads to the stomach through the pharynx.
- The oesophagus is described as a short tube.
- The stomach continues as the intestine, and then becomes the rectum, which opens outside by the cloaca.
- The liver secretes bile, which is stored in the gall bladder.
- The pancreas is a digestive gland.
- The pancreas produces pancreatic juice containing digestive enzymes.
- Food is captured by the bilobed tongue.
- Digestion of food occurs through the action of hydrochloric acid (HCl) and gastric juices.
- HCl and gastric juices are secreted from the walls of the stomach.
- Partially digested food is called chyme.
- Chyme passes from the stomach to the duodenum, which is the first part of the small intestine.
- The duodenum receives bile from the gall bladder and pancreatic juices from the pancreas through a common bile duct.
- Bile emulsifies fats.
- Pancreatic juices digest carbohydrates and proteins.
- Final digestion takes place in the intestine.
- Digested food is absorbed by numerous finger-like folds in the inner wall of the intestine.
- These folds are called villi and microvilli.
- Undigested solid waste moves into the rectum.
- The waste passes out through the cloaca.
- Frogs respire on land and in water through different methods.
- In water, skin acts as a respiratory organ in a process called cutaneous respiration.
- Dissolved oxygen in the water is exchanged through the skin by diffusion.
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