Skip to main content
Back

Fluid, Electrolyte, and Acid-Base Balance Study Guide (ANP College Level)

NotesPracticeVideo lessons

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Q1. Name the body fluid compartments and where they are located.

Background

Topic: Body Fluid Compartments

This question tests your understanding of the major fluid compartments in the human body and their anatomical locations.

Key Terms:

  • Intracellular Fluid (ICF): Fluid inside cells.

  • Extracellular Fluid (ECF): Fluid outside cells, including interstitial fluid, plasma, and other minor compartments.

Step-by-Step Guidance

  1. Recall that the body is divided into two main fluid compartments: intracellular and extracellular.

  2. Think about where each compartment is found: ICF is within cells, ECF is outside cells.

  3. Consider the subdivisions of ECF, such as plasma (in blood vessels) and interstitial fluid (between cells).

Try solving on your own before revealing the answer!

Q2. Compare the composition of fluid in these compartments. Identify the most abundant cations and anions in both compartments.

Background

Topic: Electrolyte Distribution

This question assesses your knowledge of the main ions present in the ICF and ECF, and their relative concentrations.

Key Terms:

  • Cation: Positively charged ion (e.g., Na+, K+).

  • Anion: Negatively charged ion (e.g., Cl-, HCO3-).

Step-by-Step Guidance

  1. List the main cations and anions in the ECF and ICF.

  2. Recall which ion is most abundant in each compartment (e.g., sodium in ECF, potassium in ICF).

  3. Think about the physiological importance of these differences in ion distribution.

Try solving on your own before revealing the answer!

Q3. Cause and effect of ECF changes during dehydration (iso-osmotic, hyper/hypo osmotic dehydration). What changes occur in the ECF and ICF?

Background

Topic: Fluid Shifts and Osmosis

This question examines your understanding of how dehydration affects fluid compartments and osmolarity.

Key Terms:

  • Iso-osmotic: Equal osmolarity between compartments.

  • Hyperosmotic: Higher solute concentration.

  • Hypo-osmotic: Lower solute concentration.

Step-by-Step Guidance

  1. Define each type of dehydration (iso-, hyper-, hypo-osmotic).

  2. Consider what happens to ECF volume and osmolarity in each case.

  3. Think about how water will move between ECF and ICF in response to osmotic gradients.

Try solving on your own before revealing the answer!

Q4. Hormones involved in regulating fluid volume, and how these hormones regulate volume.

Background

Topic: Hormonal Regulation of Fluid Balance

This question tests your knowledge of the endocrine mechanisms that control body fluid volume.

Key Terms:

  • Antidiuretic Hormone (ADH)

  • Aldosterone

  • Atrial Natriuretic Peptide (ANP)

Step-by-Step Guidance

  1. List the main hormones involved in fluid volume regulation.

  2. Describe the effect of each hormone on the kidneys and fluid retention or loss.

  3. Think about the triggers for release of each hormone (e.g., blood pressure, osmolarity).

Try solving on your own before revealing the answer!

Q5. Electrolyte imbalances. Hypo vs hypernatremia. How are these imbalances corrected?

Background

Topic: Sodium Imbalances

This question focuses on the causes, effects, and correction mechanisms for abnormal sodium levels in the body.

Key Terms:

  • Hyponatremia: Low sodium in the blood.

  • Hypernatremia: High sodium in the blood.

Step-by-Step Guidance

  1. Define hyponatremia and hypernatremia.

  2. Identify common causes for each condition.

  3. Consider how the body (and medical interventions) correct these imbalances.

Try solving on your own before revealing the answer!

Q6. Integration of Fluid Volume Regulation and Sodium Ion Concentration in Body Fluids- what mechanisms are involved?

Background

Topic: Homeostatic Mechanisms

This question asks you to connect how fluid volume and sodium concentration are regulated together in the body.

Key Terms:

  • Renin-Angiotensin-Aldosterone System (RAAS)

  • ADH and thirst mechanisms

Step-by-Step Guidance

  1. List the main mechanisms that regulate both fluid volume and sodium concentration.

  2. Explain how these mechanisms interact to maintain homeostasis.

  3. Think about feedback loops involved in these processes.

Try solving on your own before revealing the answer!

Q7. How does the ECF gain and lose potassium?

Background

Topic: Potassium Homeostasis

This question tests your understanding of potassium movement into and out of the extracellular fluid.

Key Terms:

  • Potassium intake (dietary)

  • Renal excretion

Step-by-Step Guidance

  1. Identify sources of potassium gain (e.g., diet, cell lysis).

  2. Identify routes of potassium loss (e.g., urine, sweat).

  3. Consider the role of the kidneys in regulating potassium balance.

Try solving on your own before revealing the answer!

Q8. Which part of the nephron secretes potassium into urine?

Background

Topic: Renal Physiology

This question focuses on the specific nephron segment responsible for potassium secretion.

Key Terms:

  • Nephron: Functional unit of the kidney.

  • Distal convoluted tubule, collecting duct

Step-by-Step Guidance

  1. Recall the structure of the nephron and its segments.

  2. Identify where potassium is secreted into the tubular fluid.

  3. Think about the role of aldosterone in this process.

Try solving on your own before revealing the answer!

Q9. What are the 3 factors affecting the rate of K+ secretion into urine?

Background

Topic: Potassium Secretion

This question asks you to identify the main factors that influence how much potassium is secreted by the kidneys.

Key Terms:

  • Aldosterone

  • Plasma potassium concentration

  • Distal tubular flow rate

Step-by-Step Guidance

  1. List the three main factors that regulate potassium secretion.

  2. Explain how each factor increases or decreases secretion.

  3. Think about physiological scenarios where these factors change.

Try solving on your own before revealing the answer!

Q10. What is the normal blood pH range? Explain alkalosis and acidosis.

Background

Topic: Acid-Base Balance

This question tests your knowledge of normal blood pH and the definitions of acid-base disorders.

Key Terms:

  • pH: Measure of hydrogen ion concentration.

  • Acidosis: Blood pH below normal range.

  • Alkalosis: Blood pH above normal range.

Step-by-Step Guidance

  1. Recall the normal range for arterial blood pH.

  2. Define acidosis and alkalosis in terms of pH values.

  3. Think about the physiological consequences of deviations from normal pH.

Try solving on your own before revealing the answer!

Q11. Which 2 organs maintain acid-base balance?

Background

Topic: Acid-Base Homeostasis

This question focuses on the organs responsible for regulating blood pH.

Key Terms:

  • Lungs (respiratory system)

  • Kidneys (renal system)

Step-by-Step Guidance

  1. Identify the two main organ systems involved in acid-base regulation.

  2. Consider how each organ system contributes to maintaining pH balance.

Try solving on your own before revealing the answer!

Q12. How does the body gain H+?

Background

Topic: Sources of Acid in the Body

This question asks you to identify the main ways hydrogen ions are produced in the body.

Key Terms:

  • Metabolic processes

  • Dietary sources

Step-by-Step Guidance

  1. List the metabolic reactions that produce H+ (e.g., cellular respiration, metabolism of proteins).

  2. Consider how diet can contribute to acid load.

Try solving on your own before revealing the answer!

Q13. What are the 2 types of acids that the body produces?

Background

Topic: Acid Types

This question tests your understanding of the classification of acids produced by the body.

Key Terms:

  • Volatile acids (e.g., carbonic acid)

  • Fixed (nonvolatile) acids (e.g., lactic acid, sulfuric acid)

Step-by-Step Guidance

  1. Define volatile and fixed acids.

  2. Give examples of each type.

  3. Think about how each type is eliminated from the body.

Try solving on your own before revealing the answer!

Q14. Volatile acids that can be converted to a gas are eliminated from the body by the _____________?

Background

Topic: Acid Elimination

This question focuses on the organ responsible for removing volatile acids.

Key Terms:

  • Respiratory system

Step-by-Step Guidance

  1. Recall what makes an acid volatile (can be converted to CO2).

  2. Identify the organ system that removes CO2 from the body.

Try solving on your own before revealing the answer!

Q15. Fixed and metabolic acids are eliminated by the _______________?

Background

Topic: Acid Elimination

This question asks which organ system removes nonvolatile acids from the body.

Key Terms:

  • Renal system (kidneys)

Step-by-Step Guidance

  1. Recall the difference between volatile and fixed acids.

  2. Identify the organ system responsible for excreting fixed acids.

Try solving on your own before revealing the answer!

Q16. What is the relationship between pCO2 and H+ levels?

Background

Topic: Acid-Base Chemistry

This question tests your understanding of how carbon dioxide levels affect blood pH.

Key Formula:

Step-by-Step Guidance

  1. Recall the chemical equation linking CO2 and H+ production.

  2. Think about how an increase in pCO2 affects H+ concentration and pH.

  3. Consider what happens when pCO2 decreases.

Try solving on your own before revealing the answer!

Q17. Hydrogen ions must be neutralized to avoid tissue damage. How does the body handle this process?

Background

Topic: Buffer Systems

This question focuses on the mechanisms the body uses to neutralize excess H+.

Key Terms:

  • Buffer systems

  • Respiratory compensation

  • Renal compensation

Step-by-Step Guidance

  1. List the three main mechanisms for neutralizing H+ (buffers, lungs, kidneys).

  2. Briefly describe how each mechanism works to reduce H+ concentration.

Try solving on your own before revealing the answer!

Q18. What are the 3 buffer systems, and where are they located?

Background

Topic: Buffer Systems

This question tests your knowledge of the main buffer systems in the body and their locations.

Key Terms:

  • Bicarbonate buffer (ECF)

  • Phosphate buffer (ICF, kidneys)

  • Protein buffer (ICF, plasma)

Step-by-Step Guidance

  1. List the three main buffer systems.

  2. Identify where each buffer system is most active.

Try solving on your own before revealing the answer!

Q19. What is the major buffer of the ECF?

Background

Topic: Buffer Systems

This question asks you to identify the primary buffer in the extracellular fluid.

Key Terms:

  • Bicarbonate buffer system

Step-by-Step Guidance

  1. Recall the main buffer systems and their locations.

  2. Identify which buffer is most important in the ECF.

Try solving on your own before revealing the answer!

Q20. What are the limitations of the biological buffer system?

Background

Topic: Buffer System Limitations

This question tests your understanding of why buffers alone cannot maintain acid-base balance indefinitely.

Key Terms:

  • Buffer capacity

  • Requirement for elimination of acids

Step-by-Step Guidance

  1. Consider what happens when buffer systems are overwhelmed by excess acid or base.

  2. Think about the need for respiratory and renal compensation.

Try solving on your own before revealing the answer!

Q21. How does the respiratory system respond to an increase or a decrease in pH? Think of respiratory movements.

Background

Topic: Respiratory Compensation

This question focuses on how breathing changes help regulate blood pH.

Key Terms:

  • Hyperventilation

  • Hypoventilation

Step-by-Step Guidance

  1. Recall how changes in breathing rate affect CO2 elimination.

  2. Think about how the body responds to acidosis (low pH) and alkalosis (high pH) via respiratory changes.

Try solving on your own before revealing the answer!

Q22. How do respiratory disorders cause changes in pH (respiratory acidosis and alkalosis)?

Background

Topic: Respiratory Acid-Base Disorders

This question tests your understanding of how lung function affects acid-base balance.

Key Terms:

  • Respiratory acidosis: CO2 retention

  • Respiratory alkalosis: Excess CO2 loss

Step-by-Step Guidance

  1. Define respiratory acidosis and alkalosis.

  2. Explain how hypoventilation and hyperventilation affect blood pH.

Try solving on your own before revealing the answer!

Q23. How do the kidneys respond to an increase or a decrease in pH?

Background

Topic: Renal Compensation

This question focuses on how the kidneys adjust acid and base excretion to regulate pH.

Key Terms:

  • H+ secretion

  • HCO3- reabsorption

Step-by-Step Guidance

  1. Describe how the kidneys respond to acidosis (increase H+ secretion, increase HCO3- reabsorption).

  2. Describe how the kidneys respond to alkalosis (decrease H+ secretion, increase HCO3- excretion).

Try solving on your own before revealing the answer!

Q24. What conditions cause metabolic acidosis and alkalosis?

Background

Topic: Metabolic Acid-Base Disorders

This question tests your knowledge of the causes of metabolic acidosis and alkalosis.

Key Terms:

  • Metabolic acidosis: Excess acid or loss of base

  • Metabolic alkalosis: Excess base or loss of acid

Step-by-Step Guidance

  1. List common causes of metabolic acidosis (e.g., diarrhea, renal failure, lactic acidosis).

  2. List common causes of metabolic alkalosis (e.g., vomiting, diuretic use).

Try solving on your own before revealing the answer!

Pearson Logo

Study Prep