Transport Of O2 and CO2 In The Blood And Tissues

Question 1

Transport of oxygen and carbon dioxide by blood depends on ?

Answer 1

Diffusion and blood flow

Question 2

The alveoli PO2 is about?

Answer 2

104 mmHg

Question 3

Pulmonary capillary PO2 is about?

Answer 3

40 mm Hg

Question 4

Initial P difference causing O2 diffusion 104-40 mmHg or 60 mmHg. True or False

Answer 4

True

Question 5

98% blood entering left atrium is?

Answer 5

Oxygenated

Question 6

The PO2 in left atrium is about?

Answer 6

104 mmHg

Question 7

What is the shunt flow?

Answer 7

2% blood (shunt blood) returning to left atrium is deoxygenated

Question 8

Shunt blood combines with oxygenated blood from pulmonary veins to form?

Answer 8

Venous admixture of blood

Question 9

PO2 shunt blood is almost equal to?

Answer 9

Normal systemic venous blood 40 mm Hg

Question 10

Reduced PO2 from about ______ to about ____ mmHg

Answer 10

104 mm Hg
95 mm Hg

Question 11

PO2 in the capillaries is ?

Answer 11

95 mm Hg

Question 12

PO2 in the interstitial fluid is ?

Answer 12

40 mm Hg

Question 13

Intracellular PO2 is?

Answer 13

23 mm Hg

Question 14

Difference in PO2 causes?

Answer 14

02 to diffuse rapidly from the capillary blood into tissues

Question 15

PO2 in capillary blood lowers to 80 mm Hg
True or false

Answer 15

False, to 40 mm Hg

Question 16

Name two ways in which oxygen is carried in blood

Answer 16

Dissolves 02= 3%
O2 bound to hemoglobin = 97%

Question 17

Binding of oxygen to hemoglobin form?

Answer 17

Oxyhemoglobin

Question 18

The primary transport mechanism of 02 is?

Answer 18

The binding if 02 to hgb to form oxyhemoglobin

Question 19

Explain the O2 binding to hemoglobin

Answer 19

O2 molecules bind loosely and reversible with the heme portion of hemoglobin
O2 binds with hemoglobin when PO2 is high in the pulmonary capillaries
O2 is released from hemoglobin into tissue as the PO2 is low in the tissue capillaries

Question 20

When O2 is used up by cell. What is formed

Answer 20

CO2

Question 21

When CO2 is formed, intracellular PC02 increases to?

Answer 21

46 mm Hg

Question 22

Interstitial fluid PC02 is?

Answer 22

45 mm Hg

Question 23

PCO2 arterial blood entering tissue?

Answer 23

40 mm Hg

Question 24

CO2 diffuses from where to where?
Carried by blood to?

Answer 24

Cells to capillaries
Heart and then lungs

Question 25

CO2 in lungs diffuses from PCO2 45 mm Hg pulmonary capillaries to 40 mm Hg alveoli
True or false

Answer 25

True

Question 26

Only pressure difference 5 mm Hg causes required?

Answer 26

C02 diffusion

Question 27

In tissue capillaries, CO2 intiates host of?

Answer 27

Physical and chemical reactions

Question 28

Small portion of CO2 transported in dissolve state to lungs
True or Fasle

Answer 28

True

Question 29

About 0.0003 l (7%) CO2 transport in dissolved form
True or false

Answer 29

True

Question 30

Dissolved CO2 reacts H2O to form?

Answer 30

Carbonic acid H2CO3

Question 31

H2CO3 accounts about70% of CO2 transport (tissues to lungs)
True or false

Answer 31

True

Question 32

The reaction to form H2CO3 is catalyzed by?

Answer 32

Carbonic anhydrase in RBC

Question 33

CO2 also react with what ?

Answer 33

Amine radicals of hemoglobin molecules

Question 34

When CO2 reacts with amine radical
Forms?

Answer 34

Carbomiohemoglobin (CO2Hgb)

Question 35

CO2 and Hemoglobin is what type of reaction?

Answer 35

Reversible reaction

Question 36

The reaction of CO2 and Hemoglobin Occurs in loose bonds to allow easy release of CO2 in alveoli
True or false

Answer 36

True

Question 37

PO2 alveoli is higher than pulmonary capillaries
True of false

Answer 37

True

Question 38

CO2 reacts similary with plasma protein in tissues capillaries
True or false

Answer 38

True

Question 39

It’s less significant CO2 transport to quantity of?

Answer 39

Plasma protein

Question 40

Both cabaminohemoglobin and plasma protein transport about, from tissue to lung

Answer 40

30% CO2