8.3 Absorption & Elimination

2.

Willie is missing many of the villi in his small intestine. This means that:

He will absorb less nutrients from his food
He will be constipated
He will have stomach aches
He will be tired

Correct Answer

A. He will absorb less nutrients from his food

Explanation

The villi in the small intestine are responsible for absorbing nutrients from food. If Willie is missing many of these villi, it means that his ability to absorb nutrients will be compromised. As a result, he will absorb less nutrients from his food, leading to potential nutrient deficiencies and related health issues.

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3.

The part of the large intestine shown here is the:

Ascending colon
Transverse colon
Rectum
Descending colon

Correct Answer

A. Transverse colon

Explanation

The correct answer is transverse colon. The image shows a section of the large intestine that is horizontally positioned across the abdomen. This is characteristic of the transverse colon, which connects the ascending colon to the descending colon. The ascending colon is located on the right side of the abdomen, the descending colon is on the left side, and the rectum is the terminal part of the large intestine, located just before the anus. Therefore, the transverse colon is the most appropriate answer based on the given information.

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4.

The part of the small intestine shown here is the:

Jejunum
Ileum
Duodenum
Anus

Correct Answer

A. Duodenum

Explanation

The correct answer is duodenum. The image shows a section of the small intestine, and based on its location, the duodenum is the first part of the small intestine that connects to the stomach. The jejunum and ileum are also parts of the small intestine, but they are located further down from the duodenum. The anus is the opening at the end of the digestive tract and is not part of the small intestine.

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5.

Which of the following does NOT happen in the small intestine?

Movement
Absorption
Digestion
Elimination

Correct Answer

A. Elimination

Explanation

The small intestine is responsible for the absorption of nutrients from food, as well as the digestion of carbohydrates, proteins, and fats. However, elimination, which refers to the process of removing waste products from the body, does not occur in the small intestine. Elimination primarily takes place in the large intestine, where waste materials are formed into feces and then expelled from the body through the rectum and anus.

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6.

The small projections that increase the surface area of the small intestine for absorption are called:

Villi
Chyme
Ileum
Duodenum

Correct Answer

A. Villi

Explanation

Villi are small projections in the small intestine that increase its surface area for absorption. This increased surface area allows for more efficient absorption of nutrients into the bloodstream. Villi have a finger-like structure and are covered in microvilli, which further increase the surface area. The absorption of nutrients such as carbohydrates, proteins, and fats occurs through the villi. Therefore, villi play a crucial role in the digestive process by maximizing the absorption capacity of the small intestine.

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7.

What is the purpose of this structure?

To move food into the large intestine
To absorb nutrients
To absorb water
To produce bile

Correct Answer

A. To absorb nutrients

Explanation

The purpose of this structure is to absorb nutrients.

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8.

Too much water being absorbed in the large intestine can cause this problem:

True
False

Correct Answer

A. False

Explanation

The statement suggests that too much water being absorbed in the large intestine can cause a problem. However, this is incorrect. In reality, the large intestine's main function is to absorb water from the remaining indigestible food matter and convert it into solid waste. If too much water is absorbed, it can lead to constipation or hard stools, but not a specific problem as mentioned in the statement. Therefore, the correct answer is false.

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9.

Constipation results from:

Not enough water being absorbed in the large intestine
Too much water being absorbed in the large intestine
Not enough nutrients being absorbed in the large intestine
Too many nutrients being absorbed in the small intestine

Correct Answer

A. Too much water being absorbed in the large intestine

Explanation

Constipation occurs when there is too much water absorbed in the large intestine. The large intestine is responsible for absorbing water from the remaining waste material before it is eliminated from the body. If too much water is absorbed, the stool becomes hard and dry, making it difficult to pass. This can be caused by various factors such as a lack of dietary fiber, dehydration, or certain medications. Increasing water intake, consuming fiber-rich foods, and maintaining a healthy lifestyle can help prevent constipation by regulating the amount of water absorbed in the large intestine.

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10.

The part of the small intestine where most of the absorption happens is the:

Duodenum
Jejunum
Transverse colon
Ascending colon

Correct Answer

A. Jejunum

Explanation

The jejunum is the correct answer because it is the part of the small intestine where most of the absorption takes place. It is responsible for absorbing nutrients, such as carbohydrates, proteins, and fats, into the bloodstream. The jejunum has a large surface area due to its numerous folds and finger-like projections called villi, which increase the absorption capacity.

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8.3 Absorption & Elimination

The duodenum is the end of the small intestine.

Quiz Preview

Willie is missing many of the villi in his small intestine. This means that:

The part of the large intestine shown here is the:

The part of the small intestine shown here is the:

Which of the following does NOT happen in the small intestine?

The small projections that increase the surface area of the small intestine for absorption are called:

What is the purpose of this structure?

Too much water being absorbed in the large intestine can cause this problem:

Constipation results from:

The part of the small intestine where most of the absorption happens is the: