Question 1

The function of chemical buffers is to

Accepted Answer

A)  Restore pH to normal following departures 
B)  Increase the effect of adding acid or base on blood pH 
C)  Bind up acid if acid is in excess or release acid if base is in excess 
D)  Equilibrate acids across cell membranes 
E)  Excrete acid or base via the lungs 
A)  Restore pH to normal following departures 
B)  Increase the effect of adding acid or base on blood pH 
C)  Bind up acid if acid is in excess or release acid if base is in excess 
D)  Equilibrate acids across cell membranes 
E)  Excrete acid or base via the lungs C

Question 2

If pH = 7, the n [H +] is

Accepted Answer

A)  1 mM 
B)  1 µM 
C)  7 mM 
D)  7 µM 
E)  0.1 µ M 
A)  1 mM 
B)  1 µM 
C)  7 mM 
D)  7 µM 
E)  0.1 µ M E

Question 3

In the diagram provided, what point represents respiratory acidosis?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E C

Question 4

Respiratory acidosis

Accepted Answer

A)  Is caused by hyperventilation 
B)  Lowers plasm a [H+] 
C)  Does not cause changes in [HCO3-] 
D)  Lowers plasma [HCO3-] 
E)  Is caused by any condition that interferes with gas exchange in the lungs 
A)  Is caused by hyperventilation 
B)  Lowers plasm a [H+] 
C)  Does not cause changes in [HCO3-] 
D)  Lowers plasma [HCO3-] 
E)  Is caused by any condition that interferes with gas exchange in the lungs

Question 5

Hyperventilation causes

Accepted Answer

A)  An increase in PaCO2 and an increase in blood pH 
B)  An increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema 
A)  An increase in PaCO2 and an increase in blood pH 
B)  An increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema

Question 6

In the Henderson-Hasselbalch equat ion, the units of [HCO3 -] are

Accepted Answer

A)  M 
B)  mM 
C)  mm Hg 
D)  Atm 
E)  Pa 
A)  M 
B)  mM 
C)  mm Hg 
D)  Atm 
E)  Pa

Question 7

Hypoventilation causes

Accepted Answer

A)  An increase in PaCO2 and an increase in blood pH 
B)  An increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema 
A)  An increase in PaCO2 and an increase in blood pH 
B)  An increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema

Question 8

Hyperventilation causes

Accepted Answer

A)  An Increase in PaCO2 and an Increase in blood pH 
B)  An Increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an Increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema 
A)  An Increase in PaCO2 and an Increase in blood pH 
B)  An Increase in PaCO2 and a decrease in blood pH 
C)  A decrease in PaCO2 and an Increase in blood pH 
D)  A decrease in PaCO2 and a decrease in blood pH 
E)  Emphysema

Question 9

In the diagram provided, what point represents uncompensated metabolic acidosis?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  E' 
E)  E 
A)  A 
B)  B 
C)  C 
D)  E' 
E)  E

Question 10

Buffers absorb the greatest am ount of H+ ions per unit concentration of buffer when

Accepted Answer

A)  The pH is much less than the pK 
B)  The pH is much greater than the pK 
C)  The pH is near the pK 
D)  pH is low 
E)  pH is high 
A)  The pH is much less than the pK 
B)  The pH is much greater than the pK 
C)  The pH is near the pK 
D)  pH is low 
E)  pH is high

Question 11

pH is defined as

Accepted Answer

A)  log [H+] 
B)  Ln [H+] 
C)  - log [H+] 
D)  -ln [H+] 
E)  -log $Y$ 
A)  log [H+] 
B)  Ln [H+] 
C)  - log [H+] 
D)  -ln [H+] 
E)  -log $Y$

Question 12

n the Henderson-Hasselbalch equation, [HA] = [A-] when

Accepted Answer

A)  The buffer capacity is maximal 
B)  pH = pK 
C)  Acid [HA] is half neutralized with base 
D)  The slope of the titration curve (pH vs amount of strong base added) is minimal 
E)  All of the above 
A)  The buffer capacity is maximal 
B)  pH = pK 
C)  Acid [HA] is half neutralized with base 
D)  The slope of the titration curve (pH vs amount of strong base added) is minimal 
E)  All of the above

Exam 49: Acid Base Physiology I Bicarbonate Buffers and Respiratory Compensation

The function of chemical buffers is to

If pH = 7, the n [H +] is

In the diagram provided, what point represents respiratory acidosis?

Respiratory acidosis

Hyperventilation causes

In the Henderson-Hasselbalch equat ion, the units of [HCO3 -] are

Hypoventilation causes

Hyperventilation causes

In the diagram provided, what point represents uncompensated metabolic acidosis?

Buffers absorb the greatest am ount of H+ ions per unit concentration of buffer when

pH is defined as

n the Henderson-Hasselbalch equation, [HA] = [A-] when

Physical Foundations Ii: Electrical Force Potential Capacitance and Current

Chemical Foundations I: Chemical Energy and Intermolecular Forces

Chemical Foundations Ii: Concentration and Kinetics

Diffusion

Electrochemical Potential and Free Energy

Cell Structure

Dna and Protein Synthesis

Protein Structure

Biological Membranes

Passive Transport and Facilitated Diffusion

Active Transport: Pumps and Exchangers

Osmosis and Osmotic Pressure

Cell Signaling

ATP Production I: Glycolysis

Atp Production Ii: Tca Cycle and Oxidative Phosphorylation

Atp Production Iii: Fatty Acid Oxidation and Amino Acid Oxidation

Origin of the Membrane Potential

The Action Potential

Propagation of the Action Potential

Skeletal Muscle Mechanics

Contractile Mechanisms in Skeletal Muscle

Neuromuscular Junction and Ec Coupling

Muscle Energetics Fatigue and Training

Smooth Muscle

Organization of the Nervous System

Cells Synapses and Neurotransmitters

Cutaneous Sensory Systems

Spinal Reflexes

Balance and Control of Movement

the Chemical Senses

Hearing

Vision

Autonomic Nervous System

Overview of the Cv System and Blood

Plasma and Red Blood Cells

White Blood Cells and Inflammation

The Heart As a Pump

Cellular Basis of Cardiac Contractility

the Cardiac Function Curve

Vascular Function: Hemodynamics

Microcirculation and Solute Exchange

Regulation of Perfusion

Integration of Cardiac Output and Venous Return

Regulation of Arterial Pressure

Mechanics of Breathing

Lung Volumes and Airway Resistance

Gas Exchange in the Lung

Oxygen and Carbon Dioxide Transport

Control of Ventilation

Anatomy and Renal Overview

Glomerular Filtration

Tubular Reabsorption and Secretion

Concentration and Dilution of Urine

Mouth and Esophagus

The Stomach

Intestinal and Colonic Motility

Pancreatic and Biliary Secretion

Digestion and Absorption of the Macronutrients

Energy Balance and Regulation of Food Intake

General Principles of Endocrinology

Hypothalamus and Pituitary Gland

The Thyroid Gland

The Endocrine Pancreas

The Adrenal Cortex

The Adrenal Medulla

The Calcitropic Hormones

Calcium and Phosphorus Homeostasis Ii

If pH = 7, the n [H⁺] is

In the Henderson-Hasselbalch equat ion, the units of [HCO₃ -] are

Buffers absorb the greatest am ount of H⁺ ions per unit concentration of buffer when