Introduction:
The body fluids, electrolytes, and the acid-base homeostasis have an important role in the human body. These components help in the muscle tissue, nervous tissue, maintained by the respiratory system and involved in the digestive and urinary system of the body. Body fluids are the materials, which have water as their main component.
Answer to Problem 1CYR
Correct answer:
The amount of a variable that is gained by the body through ingestion equals the amount that is lost from the body.
Explanation of Solution
Justification/ Explanation for the correct answer:
Option (a) states that the amount of a variable that is gained by the body through ingestion equals the amount that is lost from the body. The principle of mass balance states that the amount gained and lost by the body must be equal. The principle of mass balance is followed by water in the human body. The principle depends upon multiple factors such as ingestion, physical activity, digestive activities, kidney functions, and medications. Hence, option (a) is correct.
Explanation for the incorrect answer:
Option (b) states that the body maintains a stable mass at all times. The principle of mass balance states that the amount of material gained by the body is equal to the amount of material lost by the body. The principle does not state that the body maintains a stable mass at all times. So, it is an incorrect option.
Option (c) states that the amount of each variable brought into the body must be balanced by all other variables. The principle of mass balance states that the amount of variable gained by the body is equal to the amount of variable lost by the human body. The amount of each variable brought into the body cannot be balanced by all other variables. So, it is an incorrect option.
Option (d) states that the amount of a variable ingested is regulated by a positive feedback loop. The principle of mass balance does not state that the amount of variable ingested is regulated by a positive feedback loop. So, it is an incorrect option.
Hence, options (b), (c), and (d) are incorrect.
Therefore, it can be concluded the amount of a variable that is gained by the body through ingestion equals the amount that is lost from the body is the best description of the principle of mass balance. Water is the only body fluid, which follows this principle.
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Chapter 25 Solutions
Human Anatomy & Physiology
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