Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
a. Potassium ions are responsible for the repolarization phase of the action potential.
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Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
Chapter 25, Problem 8
Which of the following statements best describes the principle of mass balance?
a. The amount of a variable that is gained by the body through ingestion equals the amount that is lost from the body.
b. The body maintains a stable mass at all times.
c. The amount of each variable brought into the body must be balanced by all other variables.
d. The amount of a variable ingested is regulated by a positive feedback loop.
Verified step by step guidance1
Understand the concept of mass balance: Mass balance refers to the principle that the total amount of a substance in the body remains constant unless there is an input (gain) or output (loss) of that substance. This is crucial for maintaining homeostasis in the body.
Analyze the options provided: Each option describes a different interpretation of mass balance. Carefully evaluate which one aligns with the principle of maintaining equilibrium in the body.
Option a: This option states that the amount of a variable gained through ingestion equals the amount lost. This aligns with the principle of mass balance, as it emphasizes the balance between input and output.
Option b: This option suggests that the body maintains a stable mass at all times. This is incorrect because the body’s mass can fluctuate due to various factors, such as water retention or fat storage, and is not directly related to the principle of mass balance.
Option c and d: Option c implies that all variables must balance each other, which is not accurate since mass balance focuses on individual variables. Option d mentions regulation by a positive feedback loop, which is incorrect because mass balance is typically maintained by negative feedback mechanisms.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Mass Balance Principle
The principle of mass balance states that the mass of a substance in a system must remain constant over time, provided that no mass is added or removed. In biological systems, this means that the amount of a substance gained through processes like ingestion must equal the amount lost through processes such as excretion or metabolism.
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Homeostasis
Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes. This concept is crucial for understanding how the body regulates various variables, such as temperature, pH, and nutrient levels, to ensure optimal functioning and balance.
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01:59Introduction to Homeostasis
Feedback Mechanisms
Feedback mechanisms are processes that help regulate biological functions by using information from the output of a system to adjust its input. Positive feedback amplifies changes, while negative feedback counteracts them, playing a vital role in maintaining homeostasis and mass balance in the body.
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02:43Feedback Loops: Positive Feedback Example 1
Related Practice
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d. Atrial natriuretic peptide promotes water retention in the kidneys and increases the amount of water in the body.
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Textbook Question
Which of the following effects tend to be caused by hypernatremia?
a. Inhibition of ADH secretion
b. Cellular crenation
c. Cellular swelling
d. Increased urine production
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
e. Dehydration is characterized by a decreased volume and increased osmolarity of the ECF.
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Textbook Question
Which of the following is false with respect to sodium ions in human physiology?
a. Sodium ions are the most abundant extracellular cation.
b. Sodium ions are an important osmotic particle in the ECF.
c. The entry of sodium ions into a cell causes depolarization.
d. Sodium ions are more concentrated in the cytosol than in the ECF.
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Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
b. Insulin, aldosterone, and epinephrine stimulate the uptake of potassium ions into cells.
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