Respiration

Question 0

What refers to the phenomenon of the lungs snapping back to their resting size after having been stretched?

Answer 0

Elastic recoil

Question 1

Measure of the magnitude of change in lung volume accomplished by given change in the transmural pressure gradient

Answer 1

Compliance

Question 2

_______ is the erythrocytic enzyme responsible for catalyzing the conversion of CO2 into HCO3

Answer 2

Carbonic anhydrase

Question 3

Reaction that takes place in the pulmonary capillaries

Answer 3

Hb + O2 –> HbO2

Question 4

Arterial PO2 of 55 mm Hg stimulates (peripheral or central) chemoreceptors?

Answer 4

Peripheral

Question 5

Elevated arterial PCO2 weakly stimulates (peripheral or central) chemoreceptors?

Answer 5

Peripheral

Question 6

Elevated arterial H+ concentration stimulates (peripheral or central) chemoreceptors?

Answer 6

Peripheral

Question 7

Elevated brain H+ induced by an elevated arterial PCO2 stimulates (peripheral or central) chemoreceptors?

Answer 7

Central

Question 8

Arterial PO2 of 80 mm Hg stimulates (peripheral or central) chemoreceptors?

Answer 8

Neither!!

Normal range is 60-100 mm Hg

Question 9

PO2 in the blood entering the pulmonary capillaries is ____ than PO2 in alveoli

Answer 9

Less than

Question 10

PCO2 in the blood entering pulmonary capillaries is ___ PCO2 in alveolli

Answer 10

Greater than

Question 11

PO2 in alveoli ___ PO2 in blood leaving pulmonary capillaries

Answer 11

Equals

Question 12

PCO2 in alveoli is ___ PCO2 in blood leaving the pulmonary capillaries

Answer 12

Equal to

Question 13

PO2 in blood leaving pulmonary capillaries is ___ PO2 in blood entering systemic capillaries

Answer 13

Equal to

Question 14

PCO2 in blood leaving pulmonary capillaries is ___ PCO2 in blood entering systemic capillaries

Answer 14

Equal to

Question 15

PO2 in blood entering systemic capillaries is ___ PO2 in tissue cells

Answer 15

Greater than

Question 16

PCO2 in blood entering systemic capillaries is ___ PCO2 in tissue cells

Answer 16

Less than

Question 17

PO2 in tissue cells is ___ PO2 in blood leaving systemic capillaries

Answer 17

Approximately equal to

Question 18

PCO2 in tissue cells is ___ PCO2 in blood leaving systemic capillaries

Answer 18

Approximately equal to

Question 19

PO2 in blood leaving systemic capillaries is ___ PO2 in blood entering pulmonary capillaries

Answer 19

Equal to

Question 20

PCO2 in blood leaving systemic capillaries is ___ PCO2 in blood entering pulmonary capillaries

Answer 20

Equal to

Question 21

Total amount of air moved in and out of the respiratory system each minute

Tidal volume x Respiratory rate

Answer 21

Minute respiratory volume

Question 22

Volume of air that is available for gas exchange each minute

Answer 22

Alveolar ventilation rate

Question 23

2 factors that cause the lungs to tend to collapse

Answer 23

Elastic recoil

Surface tension of alveolar fluid

Question 25

2 factors that keep the lungs from collapsing

Answer 25

Intrapleural pressure Surfactant

Question 26

What might increase erythrocyte production?

Answer 26

Prolonged stay at high altitude Erythropoietin

Question 27

The transmural pressure gradient...

Answer 27

Stretches the lungs to fill the thoracic cavity

Question 28

Airway resistance

Answer 28

Is increased when airway radius decreases

Question 29

When airway resistance is elevated, the pressure gradient between the lungs and atmosphere must _______.

Answer 29

Increase

Question 30

What will cause the O2-hb dissociation curve to shift right?

Answer 30

Temperature increase PCO2 increase Acidity increase

Question 31

The plateau portion of the O2-Hb curve

Answer 31

Is in the blood PO2 range that exists at pulmonary capillaries Hb becomes almost completely saturated in lungs

Question 32

The amount of oxygen unloaded from hemoglobin at the tissue level increases when...

Answer 32

PCO2 in the tissues increases DPG concentration in RBCs increases

Question 33

The change in lung volume produced by a given change in transpulmonary pressure in the lung

Answer 33

Compliance

Question 34

Chloride ions move into the RBC when

Answer 34

Bicarbonate moves out of the RBC

Question 35

Hemoglobin molecule with an oxygen molecule bound to each of its four heme groups

Answer 35

Saturated hemoglobin

Question 36

O2-Hb curve will shift _____, resulting in a lower affinity of hemoglobin for oxygen

Answer 36

Right

Question 37

Amount of oxygen bound to hemoglobin will decrease when:

Answer 37

pH decreases (PCO2 increases) Temperature increases

Question 38

Inflammation of the pleural sac

Answer 38

Pleuracy

Question 39

Alveolar wall is ____ cell layer(s) thick

Answer 39

One

Question 40

The wall of the pulmonary capillary surrounding an alveolus is ___ cells layer(s) thick

Answer 40

One

Question 41

Alveolar wall and pulmonary capillary are components of the _____ _____.

Answer 41

Respiratory membrane

Question 42

Boyle's Law

Answer 42

At any constant temperature, the pressure of a gas varies inversely with the volume of the gas

Question 43

Air in the pleural cavity

Answer 43

Pneumothorax

Question 44

A ______ pressure across the chest wall influences lung movement.

Answer 44

Transmural

Question 45

Volume occupied by the conducting airway

Answer 45

Dead space

Question 46

Primary factor that determines the % Hb saturation

Answer 46

Oxygen partial pressure

Question 47

Pulmonary surfactant contributes to lung stability by ____ surface tension

Answer 47

Decreasing