Transport of Gasses in Respiratory System

Question 1

Partial pressure is the pressure of a ____ in a mixture of gasses measured in mmHg

Answer 1

Gas.

Question 2

Dalton’s law states that the total pressure of a mixture of gasses is ___ to the sum of the pressure of each gas

Answer 2

Equal.

Question 3

Gasses dissolve in liquids in ____ to partial pressures, so partial pressure applies to gas or liquid

Answer 3

Proportion.

Question 4

Partial pressures, represented this way, ___/___.

Answer 4

PO2/PCO2.

Question 5

O2 diffuses from alveoli into blood ____.

Answer 5

Plasma.

Question 6

PO2 increases from __ to __ mmHg

Answer 6

40, 105.

Question 7

As PO2 reaches 40-60 range, oxygen:

Answer 7

1. Begins to diffuse from the plasma into RBC

2. Binds to hemoglobin

Question 8

O2 is transported to the ___.

Answer 8

Tissues.

Question 9

Dissolved oxygen (PO2) diffuses from the plasma to the ____.

Answer 9

Tissues.

Question 10

As PO2 drops to 40-60 range oxygen:

Answer 10

1. Is released from hemoglobin
2. Begins to diffuse from RBC into the plasma
3. Continues diffusing from plasma to the tissues

Question 11

__% O2 transported in plasma (105 PO2)

Answer 11

2.

Question 12

__% O2 transported in combination with Hb

Answer 12

98.

Question 13

Oxygen dissociation curve describes:

Answer 13

O2 release from Hb.

Question 14

Increased oxygen demand (such as exercise) generates:

Answer 14

1. Increased CO2

2. Increased H+

Question 15

Increased oxygen demand (such as exercise) causes:

Answer 15

Hb to release O2 at higher PO2

Question 16

O2 released at 90-80 mm Hg =

Answer 16

BOHR EFFECT

Question 17

O2 release is also increased by

Answer 17

1. Increased temperature

2. DPG (diphosphoglyceric acid) is released by RBC when O2 to tissues decreases

Question 18

When carbon dioxide mixed with water it forms

Answer 18

bicarbonate ions

Question 19

Carbon dioxide is transported in 3 ways

Answer 19

1. 8% in solution in plasma as CO2
2. 11% in combination with blood proteins (carbamino compounds) especially Hb
3. 81% in the form of bicarbonates

Question 20

CO2 diffuses from ____ into RBC in blood

Answer 20

Tissue cells.

Question 21

CO2 reacts with water to form _____.

Answer 21

Bicarbonate ions.

Question 22

Bicarbonate ions diffuse into ___.

Answer 22

Plasma.

Question 23

Bicarbonate ions are transported by blood to ___.

Answer 23

Lungs.

Question 24

Bicarbonate ions diffuse into ___.

Answer 24

RBC’s.

Question 25

Bicarbonate ions combine with hydrogen ions to form water and ___.

Answer 25

CO2.

Question 26

CO2 diffuses from RBCs into ____ and is exhaled

Answer 26

Alveoli.