MSCI 520 LIBERTY UNIVERSITY Quiz Respiratory Physiology__PRACTICE MATERIAL_2024.pdf

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

1/14

Quiz: Respiratory Physiology

Due Mar 10 at 11:59pm

Points 50

Questions 50

Time Limit 100 Minutes

Instructions

Attempt History

Attempt Time Score

LATEST Attempt 1 54 minutes 42 out of 50

 Correct answers are hidden.

Score for this quiz: 42 out of 50

Submitted Mar 7 at 9:33am

This attempt took 54 minutes.



Question 1

1 / 1 pts

 True

 False



IncorrectQuestion 2

0 / 1 pts

 Increase the rate of oxygen delivery to the alveoli

The quiz:

Covers the Learn material from Module 4: Week 4.

Contains 50 multiple-choice and true/false questions.

Is limited to 100 minutes.

Allows 1 attempt.

Is worth 50 points.

Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 4: Week 4.

The oxygen saturation of hemoglobin will be signicantly reduced by all of these these factors

– high altitude, alcoholic ketoacidosis, methemoglobinemia, massive transfusion and

increased levels of 2,3 BPG.

The signicance of the surfactant produced in the alveoli is to;

Online

Residential

Athletics

Sign InRequest Info Apply Now Visit Us Create Guest Account

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

2/14

 Increase surface tension in the alveoli and expand the lungs

 Decrease surface tension in the alveoli and expand the lungs

 Prevent the rupture of alveolar sacs



Question 3

1 / 1 pts

 True

 False



Question 4

1 / 1 pts

 True

 False



Question 5

1 / 1 pts

 True

 False



Question 6

1 / 1 pts

 True

 False



Question 7

1 / 1 pts

Carboxyhemoglobinmakes the plasma have a cherry-red color

In a patient with pulmonary arteritis and loss of pulmonary capillaries, the suspected ventilation

to perfusion ratio will be decreased due to an increase in pulmonary dead space.

Asthma is characterized by hypersensitive airways, edema of the bronchial walls and increased

mucus plug formation in the airways.

In a patient with pneumonia and hypoxia, hypercapnia is always present due to a high solubility

on CO2 in plasma.

In a patient with severe pulmonary brosis (a restrictive airway disease), these lung volume

alterations are all expected features – decreased total lung capacity, decreased FEV1/FVC

ratio, increased residual capacity and decrease peak expiratory ow rate.

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

3/14

 True

 False



Question 8

1 / 1 pts

 J receptors

 Irritant receptors

 Lung stretch receptors

 Joint and muscle receptors



Question 9

1 / 1 pts

 True

 False



Question 10

1 / 1 pts

 alveolar pressure = +5 cm H 2 O and intrapleural pressure = −5 cm H 2 O

 airway pressure = 0 and intrapleural pressure = −5 cm H 2 O

 airway pressure = +15 cm H 2 O and intrapleural pressure = +20 cm H 2 O

 All of these



IncorrectQuestion 11

0 / 1 pts

 Arterial PO2

 Arterial O2 saturation

 Alveolar PO2

 Arterial PCO2

Which of these receptors involved in regulating breathing produces a decrease in breathing rate

when activated?

In a baby who was born at 30 weeks of gestation, there is a low lecithin to sphingomyelin ratio

due to a reactive proliferation of the type I alveolar pneumocytes.

Which of these patients is most likely to have atelectasis?

Pulse oximetry is a technique used to measure this parameter;

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

4/14



Question 12

1 / 1 pts

 An α1-adrenergic antagonist

 A β1-adrenergic antagonist

 A β2-adrenergic agonist

 A muscarinic agonist

 nicotinic agonist



IncorrectQuestion 13

0 / 1 pts

 It is equal to mixed venous pO2

 It is greater than alveolar pO2

 It is less than alveolar pO2

 It is equal to systemic arterial pO2



Question 14

1 / 1 pts

 True

 False



Question 15

1 / 1 pts

 Ventilation rate and O2 consumption increase to the same extent

 Systemic arterial Po2 decreases to about 70 mm Hg

 Systemic arterial Pco2 increases to about 60 mm Hg

A 12-year-old boy has a severe asthmatic attack with wheezing. He experiences rapid breathing

and becomes cyanotic. His arterial Po2 is 60 mm Hg and his Pco2 is 30 mm Hg. To treat this

patient, the physician should administer

Which of these is true about the pO2 at the end of the pulmonary capillaries in perfusion-limited

diffusion?

According to Boyle's law of gases, the pressure of a gas at constant temperature is directly

proportional to the volume of the gas in a chamber.

Which of the following changes occurs during strenuous exercise?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

5/14

 Systemic venous Pco2 decreases to about 20 mm Hg

 Pulmonary blood ow decreases at the expense of systemic blood ow;



Question 16

1 / 1 pts

 Increased blood pH

 Increased pulmonary vascular resistance

 Increased EPO synthesis

 All of these



Question 17

1 / 1 pts

 Bohr effect

 Haldene effect

 Chloride shift

 O2 saturation shift



Question 18

1 / 1 pts

 Person with pulmonary brosis

 Person who is hypoventilating due to morphine overdose

 Person at 12,000 feet above sea level

 Person with normal lungs breathing 50% O2

 Person with normal lungs breathing 100% O2



Question 19

1 / 1 pts

 Ventilation/perfusion (V/Q) ratio in the left lung will be zero

Which of these commonly results from exposure to very high altitude?

The effect of increased PCO2 and decreased pH on reducing the anity of hemoglobin for

oxygen is described as the;

Which person would be expected to have the largest A–a gradient?

A 49-year-old man has a pulmonary embolism that completely blocks blood ow to his left

lung. As a result, which of the following will occur?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

6/14

 Systemic arterial Po2 will be elevated

 V/Q ratio in the left lung will be lower than in the right lung

 Alveolar Po2 in the left lung will be approximately equal to the Po2 in inspired air

 Alveolar Po2 in the right lung will be approximately equal to the Po2 in venous blood



Question 20

1 / 1 pts

 A large right to left shunting of blood in the heart

 Ventilation/Perfusion defect

 High altitude

 Pulmonary brosis



Question 21

1 / 1 pts

 Ankyrin

 Band 3 protein

 Protein 4.1

 Myoglobin



Question 22

1 / 1 pts

 Peripheral chemoreceptors

 Pneumotaxic center

 Apneustic center

 Ventral respiratory neurons



Question 23

1 / 1 pts

In which of these conditions is there a limited benet derived from oxygen supplementation?

The exchange of chloride for bicarbonate ions across the red blood cell membrane is

accomplished by the anion exchanger called;

Which of these structures is responsible for turning off inspiration by limiting the burst of

action potentials in the phrenic nerve?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

7/14

 Hyperventilation – decreased plasma PO2 – Increased Plasma PCO2 – decreased alveolar PO2

 Decreased alveolar PO2 – Decreased Plasma PO2 – Increased plasma PCO2 – Hyperventilation

 Increased plasma PCO2 – Hyperventilation – Decreased alveolar PO2 – Decreased plasma PO2

 Decreased plasma PO2 – Hyperventilation – Increased plasma PCO2 – decreased alveolar PO2



Question 24

1 / 1 pts

 Coronary

 Pulmonary

 Cerebral

 Muscle

 Skin



Question 25

1 / 1 pts

 True

 False



Question 26

1 / 1 pts

 True

 False



Question 27

1 / 1 pts

 True

In a patient that climbed to the top of mount Everest, which is the correct sequence of

respiratory events;

In which vascular bed does hypoxia cause vasoconstriction?

The peripheral chemoreceptorsare more sensitive to decreased pCO2 in plasma than

decreased pO2.

Nitrogen has a high degree of solubility in plasma with normal atmospheric pressure

In a patient with asthma, the administration of an anticholinergic drug will induce an attack due

to increased bronchoconstriction and vasoconstriction.

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

8/14

 False



Question 28

1 / 1 pts

 Arterial Po2 of 100 mm Hg

 Collapse of the small alveoli

 Increased lung compliance

 Normal breathing rate

 Lecithin:sphingomyelin ratio of greater than 2:1 in amniotic uid



Question 29

1 / 1 pts

 Lung capacity

 Dead space

 Shunting

 Residual volume



Question 30

1 / 1 pts

 External intercostal

 Diaphragm

 Scalenes

 Sternocleidomastoid



Question 31

1 / 1 pts

 Functional residual capacity (FRC)

 Physiologic dead space

An infant born prematurely in gestational week 25 has neonatal respiratory distress syndrome.

Which of the following would be expected in this infant?

The volume of air in the respiratory tract that does not participate in gaseous exchange is

called;

The most important muscle of inspiration is the;

Which of the following lung volumes or capacities can be measured by spirometry?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

9/14

 Residual volume (RV)

 Total lung capacity (TLC)

 Vital capacity (VC)



IncorrectQuestion 32

0 / 1 pts

 Bohr effect

 Haldene effect

 Chloride shift

 O2 saturation shift



Question 33

1 / 1 pts

 CSF pH

 Plasma PCO2

 Plasma PO2

 CSF chloride concentration



Question 34

1 / 1 pts

 4.5 L

 3.9 L

 3.6 L

 3.0 L

 2.5 L

 2.0 L

 1.5 L

An increase in the anity of hemoglobin for CO2 due to a decrease in O2 binding is described

as the;

Which of these directly stimulates the central chemoreceptors?

A 35-year-old man has a vital capacity (VC) of 5 L, a tidal volume (Vt) of 0.5 L, an inspiratory

capacity of 3.5 L, and a functional residual capacity (FRC) of 2.5 L. What is his expiratory

reserve volume (ERV)?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

10/14



Question 35

1 / 1 pts

 Tidal volume (Vt)

 Vital capacity (VC)

 Expiratory reserve volume (ERV)

 Residual volume (RV)

 Functional residual capacity (FRC)

 Inspiratory capacity

 Total lung capacity



Question 36

1 / 1 pts

 Hypoventilation

 Arterial Po2 greater than 100 mm Hg

 Decreased 2,3-diphosphoglycerate (DPG) concentration

 Shift to the right of the hemoglobin–O2 dissociation curve

 Pulmonary vasodilation

 Hypertrophy of the left ventricle

 Respiratory acidosis



Question 37

1 / 1 pts

 Alveolar sacs

 Alveolar ducts

 Segmental Bronchi

 Respiratory bronchioles



Which volume remains in the lungs after a maximal expiration?

A 38-year-old woman moves with her family from New York City (sea level) to Leadville,

Colorado (10,200 feet above sea level). Which of the following will occur as a result of residing

at high altitude?

Which of these structures of the respiratory system is not involved in gaseous exchange?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

11/14

Question 38

1 / 1 pts

 Exercise

 Anemia

 Pulmonary edema

 Pulmonary brosis



IncorrectQuestion 39

0 / 1 pts

 increased P50

 increased anity of hemoglobin for O2

 impaired ability to unload O2 in the tissues

 increased O2-carrying capacity of hemoglobin

 decreased O2-carrying capacity of hemoglobin



IncorrectQuestion 40

0 / 1 pts

 increased pH

 decreased 2,3-diphosphoglycerate (DPG) concentration

 strenuous exercise

 fetal hemoglobin (HbF)

 carbon monoxide (CO) poisoning



IncorrectQuestion 41

0 / 1 pts

 True

 False



The lungs diffusion capacity is generally increased in which of these conditions?

In the oxygen-hemoglobin dissociation curve,a rightward shift is associated with;

In the hemoglobin–O2 dissociation curves, a rightward shiftcould be caused by;

The R-R interval is commonly increased during inspiration due to increased venous return – a

phenomenon called respiratory sinus arrhythmia.

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

12/14

Question 42

1 / 1 pts

 True

 False



Question 43

1 / 1 pts

 Trachea

 Largest bronchi

 Medium-sized bronchi

 Smallest bronchi

 Alveoli



Question 44

1 / 1 pts

 Intrapleural pressure is positive

 The volume in the lungs is less than the functional residual capacity (FRC)

 Alveolar pressure equals atmospheric pressure

 Alveolar pressure is higher than atmospheric pressure

 Intrapleural pressure is more negative than it is during expiration



Question 45

1 / 1 pts

 Nitrous oxide

 CO2

 CO

 O2



The proportion of oxygen in inspired air in Lynchburg is about 78.09%, making oxygen the most

important gas for humans.

Which of the following is the site of highest airway resistance?

Which of the following is true during inspiration?

In alveolar gaseous exchange, which of these gases is diffusion-limited?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

13/14

IncorrectQuestion 46

0 / 1 pts

 Tidal volume (Vt)

 Vital capacity (VC)

 Expiratory reserve volume (ERV)

 Residual volume (RV)

 Functional residual capacity (FRC)

 Inspiratory capacity

 Total lung capacity



Question 47

1 / 1 pts

 Conversion of CO2 and H2O to H+ and HCO3− in the red blood cells (RBCs)

 Buffering of H+ by oxyhemoglobin

 Shifting of HCO3− into the RBCs from plasma in exchange for Cl−

 Binding of HCO3− to hemoglobin

 Alkalinization of the RBCs



Question 48

1 / 1 pts

 Hypoventilation

 Fibrosis

 V/Q defect

 Right-to-left shunt

 Anemia



Which volume remains in the lungs after a tidal volume (Vt) is expired?

In the transport of CO2 from the tissues to the lungs, which of the following occurs in venous

blood?

A 62-year-old man at sea level breaths a gas mixture containing 21% O2. He has the following

arterial blood gas values: PaO2 = 60 mm Hg PaCO2 = 70 mm Hg Which of the following is the

cause of his hypoxemia?

3/14/24, 7:59 AM

Quiz: Respiratory Physiology: MSCI520: Principles of Physiology I (C01)

https://canvas.liberty.edu/courses/585957/quizzes/2858852

14/14

Question 49

1 / 1 pts

 True

 False



Question 50

1 / 1 pts

 Hypoventilation

 Right-to-left cardiac shunt

 Anemia

 Carbon monoxide poisoning

 Ascent to high altitude

Quiz Score: 42 out of 50

Expiration is a passive process due to the elastic recoil of the lungs. A loss of elastic recoil

results in extremely compliant lungs.

Which of the following causes of hypoxia is characterized by a decreased arterial Po2 and an

increased A–a gradient?

MSCI 520 LIBERTY UNIVERSITY Quiz Respiratory Physiology__PRACTICE MATERIAL_2024.pdf

Students also viewed