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Magazine Chapter 23: Problem 6
Match each organ with a digestive function. a. makes bile b. compacts undigested residues c. secretes enzymes, bicarbonate d. absorbs most nutrients e. secretes gastric fluid f. stores, secretes bile __________gallbladder __________large intestine __________liver __________small intestine __________stomach __________pancreas
Short Answer
Expert verified
Gallbladder: f, Large Intestine: b, Liver: a, Small Intestine: d, Stomach: e, Pancreas: c.
Step by step solution
01
Identify Functions
Go through each digestive function provided:
a. makes bile,
b. compacts undigested residues,
c. secretes enzymes, bicarbonate,
d. absorbs most nutrients,
e. secretes gastric fluid,
f. stores, secretes bile.
02
Match Gallbladder
The gallbladder is known for storing and secreting bile. Therefore, match the function
f. stores, secretes bile
to the gallbladder.
03
Match Large Intestine
The large intestine is responsible for compacting undigested residues. So, match the function
b. compacts undigested residues
to the large intestine.
04
Match Liver
The liver is known for producing bile. Therefore, match the function
a. makes bile
to the liver.
05
Match Small Intestine
The small intestine primarily absorbs most nutrients. So, match the function
d. absorbs most nutrients
to the small intestine.
06
Match Stomach
The stomach's main role is to secrete gastric fluid necessary for digestion. Therefore, match the function
e. secretes gastric fluid
to the stomach.
07
Match Pancreas
The pancreas secretes digestive enzymes and bicarbonate into the small intestine. Match the function
c. secretes enzymes, bicarbonate
to the pancreas.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Gallbladder function
The gallbladder is a small, pear-shaped organ located on the right side of your abdomen, just beneath the liver. Its primary function is not to produce anything but to store and concentrate bile, a digestive fluid produced by the liver. Bile is essential for the digestion and absorption of fats in your diet.
- When you eat, the gallbladder releases bile through the bile ducts into the small intestine.
- This release happens in response to hormones triggered by eating, primarily when fats are consumed.
- Bile emulsifies fats, making them easier for digestive enzymes to break down.
Liver function
The liver is a large and vital organ located at the upper right portion of the abdomen. Its most well-known function related to digestion is the production of bile. In addition:
- Bile produced by the liver is secreted into tiny ducts that carry it to the gallbladder for storage or directly to the small intestine.
- Aside from making bile, the liver also plays a key role in detoxifying the bloodstream, metabolizing nutrients, and storing vitamins and minerals.
- It is also responsible for producing proteins necessary for blood clotting and transporting nutrients in the body.
Small intestine function
The small intestine is a stretched-out, coiled tube, about 20 feet long, consisting of three parts: the duodenum, jejunum, and ileum. It is where most of the digestion and absorption of nutrients occur. Here's how it operates:
- The duodenum receives chyme from the stomach and bile from the gallbladder, preparing the digestion of fats and neutralizing stomach acids.
- The jejunum and ileum are primarily responsible for the absorption of nutrients.
- The inner walls have folds and finger-like projections called villi, which increase the surface area for absorption.
Pancreas function
The pancreas is situated behind the stomach and plays a dual role in the body: it has both endocrine and exocrine functions. For digestion, its exocrine function is crucial:
- The pancreas secretes digestive enzymes such as amylase, protease, and lipase that further break down carbohydrates, proteins, and fats.
- It also releases bicarbonate to neutralize stomach acid entering the small intestine, ensuring the proper pH for enzymatic functions.
- These digestive juices flow into the small intestine through ducts, contributing to efficient digestion.
Stomach function
The stomach is a muscular, sac-like organ located between the esophagus and small intestine. Its primary function is the digestion of proteins, but it also has several other essential roles:
- The stomach secretes gastric juices, which are comprised of hydrochloric acid and enzymes like pepsin, aiding in breaking down proteins.
- The acidic environment also helps kill bacteria and pathogens ingested with food.
- Food is mechanically mixed to form a semi-liquid mass called chyme, which moves into the small intestine for further digestion.
Large intestine function
The large intestine, or colon, is the final section of the digestive tract, responsible for processing waste. It plays a crucial role in absorbing water and electrolytes from the remaining indigestible food matter.
- The large intestine compacts and conveys waste material into feces.
- It hosts a variety of bacteria that assist in breaking down some substances and synthesizing essential vitamins, like vitamin K.
- Its structure, including the cecum, colon, and rectum, allows for efficient water absorption and waste transportation.
