The absorptive surface of the small intestine is greater than that of other human digestive organs because of its length and the presence of

A. alveoli

B. neurons

C. villi

D. nephrons

Answer Explanation:

C) villi

- Correct: The absorptive surface of the small intestine is greatly increased due to the presence of villi. Villi are finger-like projections that line the inner surface of the small intestine. These structures greatly increase the surface area available for absorption. Each villus contains capillaries and lacteals (lymphatic vessels) that absorb nutrients from digested food. The large surface area provided by the villi allows for more efficient absorption of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.

A) alveoli

- Incorrect: Alveoli are tiny air sacs in the lungs where gas exchange occurs during respiration. They are not found in the digestive system and do not contribute to the absorptive surface of the small intestine.

B) neurons

- Incorrect: Neurons are nerve cells that transmit signals throughout the body, including the digestive system. While neurons play a role in regulating digestion and other digestive processes, they do not directly contribute to the absorptive surface of the small intestine.

D) nephrons

- Incorrect: Nephrons are the functional units of the kidneys responsible for filtering blood and producing urine. They are not part of the digestive system and do not contribute to the absorptive surface of the small intestine.

Therefore, the Correct Answer is C.

Q #1: Which two organ systems provide materials required for the human body to produce ATP?

A. reproductive and excretory

B. digestive and respiratory

C. respiratory and immune

D. digestive and reproductive

Answer Explanation

The digestive system provides materials in the form of nutrients from food, such as carbohydrates, fats, and proteins. These nutrients are broken down during digestion and absorbed into the bloodstream.

The respiratory system provides oxygen, which is necessary for cellular respiration, the process by which ATP (adenosine triphosphate) is produced in cells. Oxygen is inhaled into the lungs and diffuses into the bloodstream to be transported to cells throughout the body.
Q #2: Which foods should be included in a balanced diet as a good source of roughage?

A. red meat and poultry

B. fresh fruits and vegetables

C. eggs and milk products

D. animal fat and plant oil

Answer Explanation

B) fresh fruits and vegetables

- Correct: Fresh fruits and vegetables are excellent sources of roughage, also known as dietary fiber. These foods provide insoluble fiber, soluble fiber, or a combination of both, which adds bulk to the stool and promotes healthy digestion. Insoluble fiber, found in foods like leafy greens, celery, and broccoli, helps to move food through the digestive tract, preventing constipation. Soluble fiber, found in foods like apples, oats, and beans, can help lower cholesterol levels and regulate blood sugar levels.

A) red meat and poultry

- Incorrect: While red meat and poultry are good sources of protein and other nutrients, they are not significant sources of dietary fiber or roughage. These foods do not contribute to the fiber content of the diet.

C) eggs and milk products

- Incorrect: Eggs and milk products are valuable sources of protein, vitamins, and minerals, but they are not significant sources of dietary fiber or roughage. These foods do not provide the fiber needed for healthy digestion.

D) animal fat and plant oil

- Incorrect: Animal fat and plant oils are sources of dietary fat, which is important for providing energy and essential fatty acids in the diet. However, they do not contain significant amounts of dietary fiber or roughage. These foods do not contribute to the fiber content of the diet.
Q #3: Base your answer to the following question on the diagram below, which represents the human digestive system. Most reabsorption of water occurs within structure

A. F

B. G

C. C

D. D

Answer Explanation

Most reabsorption of water occurs in the large intestine, F.

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The absorptive surface of the small intestine is greater than that of other human digestive organs because of its length and the presence of

More Questions on TEAS 7 Science

Q #1: Which two organ systems provide materials required for the human body to produce ATP?

Answer Explanation

Q #2: Which foods should be included in a balanced diet as a good source of roughage?

Answer Explanation

Q #3: Base your answer to the following question on the diagram below, which represents the human digestive system. Most reabsorption of water occurs within structure

Answer Explanation

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