If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body's needs by

A. emulsification

B. manufacturing more bile

C. converting glycogen into glucose

D. releasing iron

Answer Explanation:

C) converting glycogen into glucose

- Correct: When no carbohydrate ingestion occurs in the body during a 24-hour period, the liver can provide for the body's glucose needs by converting stored glycogen into glucose through a process known as glycogenolysis. Glycogen is a polysaccharide that serves as a storage form of glucose in the liver and muscles. When blood glucose levels decrease, such as during fasting or low carbohydrate intake, the liver breaks down glycogen into glucose molecules, which are then released into the bloodstream to maintain blood glucose levels and provide energy to cells throughout the body.

A) emulsification

- Incorrect: Emulsification is a process by which bile breaks down large fat globules into smaller droplets to aid in fat digestion in the small intestine. It is not related to the liver's role in glucose metabolism.

B) manufacturing more bile

- Incorrect: The liver produces bile continuously, regardless of carbohydrate ingestion. While the liver's production of bile is important for fat digestion and absorption, it is not directly related to glucose metabolism.

D) releasing iron

- Incorrect: The liver is involved in storing and regulating iron levels in the body, but releasing iron is not directly related to providing for the body's glucose needs in the absence of carbohydrate ingestion.

Therefore, the Correct Answer is C.

Q #1: Which disorder would most directly interfere with the emulsification of fats?

A. bronchitis

B. gout

C. goiter

D. gallstones

Answer Explanation

D) gallstones

- Correct: Gallstones would most directly interfere with the emulsification of fats. Emulsification of fats is primarily facilitated by bile, a digestive fluid produced by the liver and stored in the gallbladder. Gallstones are hardened deposits that form in the gallbladder, often consisting of cholesterol or bilirubin. These stones can obstruct the flow of bile from the gallbladder into the small intestine, impairing the emulsification of fats and leading to difficulties in fat digestion and absorption. This obstruction can result in symptoms such as abdominal pain, nausea, and indigestion.

A) bronchitis

- Incorrect: Bronchitis is inflammation of the bronchial tubes in the lungs and does not directly interfere with the emulsification of fats in the digestive system.

B) gout

- Incorrect: Gout is a form of arthritis characterized by the accumulation of uric acid crystals in the joints, typically affecting the feet. It does not directly interfere with the emulsification of fats in the digestive system.

C) goiter

- Incorrect: Goiter is an abnormal enlargement of the thyroid gland in the neck, often due to iodine deficiency or thyroid disorders. It does not directly interfere with the emulsification of fats in the digestive system.
Q #2: Which of these nutrients is absorbed mainly in the duodenum?

A. glucose

B. iron

C. sodium

D. water

Answer Explanation

b) iron

- Correct: Iron is mainly absorbed in the duodenum, particularly in its proximal portion. Iron absorption occurs through active transport mechanisms facilitated by specialized transport proteins in the duodenal epithelial cells. Once absorbed, iron can be transported into the bloodstream and utilized for various physiological functions, including the production of hemoglobin and other iron-containing proteins.

a) glucose

- Incorrect: Glucose is primarily absorbed in the small intestine, but its absorption occurs mainly in the jejunum and ileum rather than the duodenum. Glucose is absorbed through facilitated diffusion and active transport mechanisms in the epithelial cells lining the small intestine.

c) sodium

- Incorrect: Sodium is absorbed throughout the small intestine, including the duodenum, jejunum, and ileum. Its absorption occurs through active transport mechanisms in the epithelial cells lining the intestinal mucosa, primarily in conjunction with glucose and other nutrients.

d) water

- Incorrect: Absorption of water indeed takes place in the large intestine, particularly in the colon.
Q #3: Emulsification of fats in the small intestines is due to the action of bile, which is released into the intestine from the

A. stomach

B. gall bladder

C. villi

D. lacteals

Answer Explanation

B) gall bladder

- Correct: Bile, which aids in the emulsification of fats in the small intestine, is stored and concentrated in the gall bladder before being released into the small intestine. When fatty foods enter the small intestine, the gall bladder contracts and releases bile into the duodenum (the first part of the small intestine). Bile helps to break down large fat globules into smaller droplets, a process known as emulsification, which increases the surface area for the action of digestive enzymes, such as lipase, facilitating the digestion and absorption of fats.

A) stomach

- Incorrect: Bile is not released from the stomach. The stomach primarily secretes gastric juices containing hydrochloric acid and pepsinogen to aid in the digestion of proteins.

C) villi

- Incorrect: Villi are finger-like projections in the lining of the small intestine that increase its surface area for nutrient absorption but do not release bile.

D) lacteals

- Incorrect: Lacteals are lymphatic vessels found in the villi of the small intestine that absorb dietary fats and fat-soluble vitamins. They do not release bile.

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If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body's needs by

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Q #1: Which disorder would most directly interfere with the emulsification of fats?

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If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body&#39;s needs by

More Questions on TEAS 7 Science

Q #1: Which disorder would most directly interfere with the emulsification of fats?

Answer Explanation

Q #2: Which of these nutrients is absorbed mainly in the duodenum?

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Q #3: Emulsification of fats in the small intestines is due to the action of bile, which is released into the intestine from the

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If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body's needs by