Base your answer to the following question on the diagram below of some human digestive organs and on your knowledge of biology. Which organ synthesizes both urea and bile?

A. A

B. E

C. C

D. D

Answer Explanation:

The organ that synthesizes both urea and bile is the liver (E).

The liver plays a crucial role in metabolism and detoxification in the body. It synthesizes urea as a waste product of protein metabolism through the process of the urea cycle. Urea is then excreted by the kidneys in urine.

Additionally, the liver produces bile, a substance that aids in the digestion and absorption of fats. Bile is synthesized in hepatocytes (liver cells) and then stored and concentrated in the gallbladder before being released into the small intestine to emulsify fats.

Therefore, the Correct Answer is B.

Q #1: Some vitamins are essential to an organism because they function as

A. coenzymes

B. auxins

C. hormones

D. neurotransmitters

Answer Explanation

A) coenzymes

- Correct: Some vitamins function as coenzymes, which are molecules that assist enzymes in their catalytic activity. Coenzymes work together with enzymes to facilitate various biochemical reactions in the body. For example, certain B vitamins (such as thiamine, riboflavin, and niacin) act as coenzymes in energy metabolism, while vitamin K acts as a coenzyme in blood clotting. Without these essential vitamins, many metabolic processes in the body would be impaired, leading to various health problems.

B) auxins

- Incorrect: Auxins are plant hormones that regulate plant growth and development. They are not vitamins and do not function as coenzymes in biochemical reactions in organisms.

C) hormones

- Incorrect: Hormones are signaling molecules that regulate various physiological processes in organisms. While some vitamins may indirectly influence hormone production or function, they do not function primarily as hormones themselves.

D) neurotransmitters

- Incorrect: Neurotransmitters are chemical messengers that transmit signals between nerve cells (neurons) in the nervous system. They are not vitamins and do not function as coenzymes in biochemical reactions in organisms.
Q #2: 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.
Q #3: In gastric bypass surgery, the stomach is reduced to hold 1 ounce of food, instead of 3 pints. This surgery would drastically impact one's

A. excretory system

B. digestive system

C. circulatory system

D. respiratory system

Answer Explanation

B) digestive system

- Correct: Gastric bypass surgery involves the reduction of the stomach's size, typically to hold only about 1 ounce of food instead of its normal capacity of 3 pints or more. This surgery drastically impacts the digestive system because it alters the anatomy and physiology of the gastrointestinal tract. By reducing the stomach's size, gastric bypass surgery restricts the amount of food that can be consumed at one time, leading to reduced calorie intake and aiding in weight loss. Additionally, the rearrangement of the digestive tract may affect the absorption of nutrients, potentially leading to changes in nutrient absorption and metabolism.

A) excretory system

- Incorrect: While changes in diet and weight loss resulting from gastric bypass surgery may indirectly affect the excretory system, the primary impact of this surgery is on the digestive system itself, not the excretory system.

C) circulatory system

- Incorrect: Although obesity and associated health conditions may impact the circulatory system, such as increasing the risk of cardiovascular disease, the direct impact of gastric bypass surgery is on the digestive system, not the circulatory system.

D) respiratory system

- Incorrect: Gastric bypass surgery does not directly impact the respiratory system. While weight loss resulting from the surgery may improve respiratory function in individuals with obesity-related respiratory conditions such as sleep apnea, the surgery primarily affects the digestive system by altering the anatomy and function of the gastrointestinal tract.

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Base your answer to the following question on the diagram below of some human digestive organs and on your knowledge of biology. Which organ synthesizes both urea and bile?

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Base your answer to the following question on the diagram below of some human digestive organs and on your knowledge of biology. Which organ synthesizes both urea and bile?

More Questions on TEAS 7 Science

Q #1: Some vitamins are essential to an organism because they function as

Answer Explanation

Q #2: If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body&#39;s needs by

Answer Explanation

Q #3: In gastric bypass surgery, the stomach is reduced to hold 1 ounce of food, instead of 3 pints. This surgery would drastically impact one&#39;s

Answer Explanation

Free Access on TEAS 7 Exams and Study Notes

TEAS 7 Exams (Q&A)

TEAS 7 Study Notes

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Refer a Friend

Q #2: If no carbohydrate ingestion occurs in the body during a 24-hour period, liver activity provides for the body's needs by

Q #3: In gastric bypass surgery, the stomach is reduced to hold 1 ounce of food, instead of 3 pints. This surgery would drastically impact one's