Question 1

If the negative feedback regulation of blood pH by the respiratory system is defective when the blood pH is low, what is most likely to happen?

Accepted Answer

If the negative feedback regulation is defective, the respiratory system may not respond properly to low blood pH, leading to relaxation of respiratory muscles and reduced exhalation of CO2, which would normally help increase blood pH.

Question 2

What is a function of the carboxyl group of the protein buffer system?

Accepted Answer

The carboxyl group of the protein buffer system can release H⁺ ions when the pH of the blood increases, helping to maintain acid-base balance.

Question 3

One of the effects of an increase in blood acidity is

Accepted Answer

An increase in blood acidity stimulates the dorsal respiratory group in the medulla oblongata, which increases the rate and depth of breathing to eliminate more carbon dioxide (CO2) from the body, thereby reducing acidity.

Question 4

Under what condition should a medical practitioner perform respiratory compensation on a patient?

Accepted Answer

Respiratory compensation is performed by medical practitioners to correct altered blood pH levels.

Question 5

The H⁺ secreted into the tubular fluid of the late distal tubule and collecting duct are buffered by

Accepted Answer

In the late distal tubule and collecting duct, H⁺ is primarily buffered by NH₃ (ammonia) and HPO₄²⁻ (phosphate), which help to maintain acid-base balance in the kidneys.

Question 6

Respiratory acidosis occurs when the partial pressure of

Accepted Answer

Respiratory acidosis is characterized by an increase in carbon dioxide (CO2) in the blood, which leads to a decrease in the pH of the blood. A normal partial pressure of CO2 in the arterial blood is between 35-45 mmHg. Therefore, if the partial pressure of CO2 in the arterial blood exceeds 45 mmHg, it would result in respiratory acidosis.

Question 7

Which of the following scenarios would likely cause a metabolic alkalosis?

Accepted Answer

Excessive vomiting can lead to a loss of stomach acid, causing an increase in pH levels and ultimately resulting in metabolic alkalosis.

Question 8

_____ _____ is a condition in which the systemic arterial blood HCO₃⁻concentration is above 26 mEq/liter.

Accepted Answer

The answer of _____ _____ is a condition in which...

Question 9

When is the carbonic acid-bicarbonate buffer system ineffective against drastic pH changes in the body?

Accepted Answer

The carbonic acid-bicarbonate buffer system is ineffective when there is an excess of CO2 in the blood because it relies on the equilibrium between CO2 and bicarbonate to maintain pH. Excess CO2 shifts this equilibrium, overwhelming the buffer system and leading to acidosis.

Question 10

The phosphate buffer system consist of

Accepted Answer

The phosphate buffer system consists of a weak acid (H2PO4-) and its conjugate base (HPO42-) which can act as both an acid and a base, allowing it to effectively buffer solutions in the physiological pH range. Choice C includes the correct chemical formula for the phosphate buffer system, with H2PO4- and HPO42- listed as the weak acid and conjugate base, respectively. The other choices do not include the correct chemicals for the phosphate buffer system.

Question 11

Identify the reaction where a weak acid buffers a base.

Accepted Answer

In reaction A, the weak acid H2PO4- donates a proton to neutralize the base OH-, forming water and HPO4^2-, thus buffering the base.

Question 12

In the process of secretion of H⁺by the intercalated cells in the late distal tubule and collecting duct, what would happen if Cl⁻/HCO₃⁻antiporters are absent?

Accepted Answer

The answer of In the process of secretion of H<sup>+...

Question 13

_____ is the physiological response that normalizes arterial blood pH in the case of an acid-base imbalance.

Accepted Answer

The answer of _____ is the physiological response that normalizes...

Question 14

_____ is a condition in which blood pH is higher than 7.45.

Accepted Answer

The answer of _____ is a condition in which blood...

Question 15

Respiratory alkalosis is a condition in which the partial pressure of CO₂ in the systemic arterial blood

Accepted Answer

Respiratory alkalosis occurs when the partial pressure of carbon dioxide (PCO2) in the arterial blood falls below the normal range of 35-45 mmHg. Therefore, choice D, which states that PCO2 falls below 35 mmHg, is the correct answer. Choices A, B, C, and E are incorrect because they do not describe the characteristic PCO2 changes associated with respiratory alkalosis.

Question 16

One of the physiological effects commonly associated with severe acidosis is

Accepted Answer

The answer of One of the physiological effects commonly associated...

Question 17

How do you treat metabolic alkalosis?

Accepted Answer

Metabolic alkalosis can be caused by electrolyte imbalances, such as low potassium or low chloride levels. Therefore, the best treatment for metabolic alkalosis would be to give fluid solutions to correct electrolyte deficiencies. This can help restore the acid-base balance in the body. Choices A, B, C, and D are not appropriate treatments for metabolic alkalosis.

Question 18

Since H₂CO₃ can be eliminated by exhaling CO₂, it is called a/an _____ _____.

Accepted Answer

The answer of Since H₂CO₃ can be eliminated by exhaling...

Question 19

What is likely to happen if renal compensation fails to occur during respiratory alkalosis?

Accepted Answer

If renal compensation fails during respiratory alkalosis, the kidneys may not adequately excrete bicarbonate (HCO3-), leading to excessive reabsorption and worsening the alkalosis.

Question 20

Identify the equation that correctly represents that protein buffer system.

Accepted Answer

This equation represents the protein buffer system through the reaction between a protein compound with a histidine (R-NH) group, H+ ions, and HPO42- ions. The reaction produces a protonated form of the protein compound and a deprotonated form of the phosphate ion. The other two equations do not represent a protein buffer system.

Quiz 20: Fluid, Electrolyte, and Acidbase Homeostasis

If the negative feedback regulation of blood pH by the respiratory system is defective when the blood pH is low, what is most likely to happen?

What is a function of the carboxyl group of the protein buffer system?

One of the effects of an increase in blood acidity is

Under what condition should a medical practitioner perform respiratory compensation on a patient?

The H⁺ secreted into the tubular fluid of the late distal tubule and collecting duct are buffered by

Respiratory acidosis occurs when the partial pressure of

Which of the following scenarios would likely cause a metabolic alkalosis?

_ _ is a condition in which the systemic arterial blood HCO₃⁻concentration is above 26 mEq/liter.

When is the carbonic acid-bicarbonate buffer system ineffective against drastic pH changes in the body?

The phosphate buffer system consist of

Identify the reaction where a weak acid buffers a base.

In the process of secretion of H⁺by the intercalated cells in the late distal tubule and collecting duct, what would happen if Cl⁻/HCO₃⁻antiporters are absent?

_____ is the physiological response that normalizes arterial blood pH in the case of an acid-base imbalance.

_____ is a condition in which blood pH is higher than 7.45.

Respiratory alkalosis is a condition in which the partial pressure of CO₂ in the systemic arterial blood

One of the physiological effects commonly associated with severe acidosis is

How do you treat metabolic alkalosis?

Since H₂CO₃ can be eliminated by exhaling CO₂, it is called a/an _ _.

What is likely to happen if renal compensation fails to occur during respiratory alkalosis?

Identify the equation that correctly represents that protein buffer system.

Quiz 20: Fluid, Electrolyte, and Acidbase Homeostasis

If the negative feedback regulation of blood pH by the respiratory system is defective when the blood pH is low, what is most likely to happen?

What is a function of the carboxyl group of the protein buffer system?

One of the effects of an increase in blood acidity is

Under what condition should a medical practitioner perform respiratory compensation on a patient?

The H+ secreted into the tubular fluid of the late distal tubule and collecting duct are buffered by

Respiratory acidosis occurs when the partial pressure of

Which of the following scenarios would likely cause a metabolic alkalosis?

_____ _____ is a condition in which the systemic arterial blood HCO3− concentration is above 26 mEq/liter.

When is the carbonic acid-bicarbonate buffer system ineffective against drastic pH changes in the body?

The phosphate buffer system consist of

Identify the reaction where a weak acid buffers a base.

In the process of secretion of H+ by the intercalated cells in the late distal tubule and collecting duct, what would happen if Cl−/HCO3− antiporters are absent?

_____ is the physiological response that normalizes arterial blood pH in the case of an acid-base imbalance.

_____ is a condition in which blood pH is higher than 7.45.

Respiratory alkalosis is a condition in which the partial pressure of CO2 in the systemic arterial blood

One of the physiological effects commonly associated with severe acidosis is

How do you treat metabolic alkalosis?

Since H2CO3 can be eliminated by exhaling CO2, it is called a/an _____ _____.

What is likely to happen if renal compensation fails to occur during respiratory alkalosis?

Identify the equation that correctly represents that protein buffer system.

The H⁺ secreted into the tubular fluid of the late distal tubule and collecting duct are buffered by

_ _ is a condition in which the systemic arterial blood HCO₃⁻concentration is above 26 mEq/liter.

In the process of secretion of H⁺by the intercalated cells in the late distal tubule and collecting duct, what would happen if Cl⁻/HCO₃⁻antiporters are absent?

Respiratory alkalosis is a condition in which the partial pressure of CO₂ in the systemic arterial blood

Since H₂CO₃ can be eliminated by exhaling CO₂, it is called a/an _ _.