Week 11 Pre-Class Activity #1

 Correct answers will be available on Jun 21 at 12am.

Score for this attempt: 12 out of 12

Submitted Jun 20 at 7:23pm

This attempt took 3 minutes.

 

Question 1

1 / 1 pts

What are the three factors we discussed that impact pulmonary ventilation?

  

airway resistance

 

  

alveolar surface tension

 

  

lung tissue elasticity

 

  

abdominal muscle strength

 

 

Question 2

1 / 1 pts

How would factor #1 be affected by inflammation and edema?

Please read carefully, then select the correct dropdown box to identify the factor being described.

airway resistance is defined as anything that slows the flow of air through the respiratory tract. The         [ Select ]      ["diameter", "length"]  of the airway is the primary factor affecting it. It is the physical factor influencing pulmonary ventilation that would be the most affected by inflammation and edema. Both inflammation and edema would increase this factor by         [ Select ]      ["increasing diameter", "decreasing diameter"]  , increasing the energy and effort needed to move air into and out of the lungs.

Answer 1:

airway resistance

 

Answer 2:

diameter

 

Answer 3:

decreasing diameter

 

 

Question 3

1 / 1 pts

How would factor #2 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

 

        [ Select ]      ["lung tissue elasticity", "alveolar surface tension", "airway resistance"]  is a force created by the attraction between water molecules that tends to collapse the alveoli. It could be         [ Select ]      ["decreased", "increased"]  by the increase in fluid in the alveoli from edema.

Answer 1:

alveolar surface tension

 

Answer 2:

increased

 

 

Question 4

1 / 1 pts

How would factor #3 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

lung tissue elasticity refers to the ability of the lungs and the chest wall to stretch. If edema caused an increase in alevolar surface tension , [3] would be reduced, as these parameters share an inverse relationship similar to the relationship between volume and pressure stated by Boyle’s law.

Answer 1:

lung tissue elasticity

 

Answer 2:

alevolar surface tension

 

 

Question 5

5 / 5 pts

Define both pulmonary gas exchange and tissue gas exchange.

Your pre-class from last week should help you through this (you can pull out the diagram you labeled tracking the journey of O2 an CO2)--this is a verbal version of the same exercise.

 

Pulmonary gas exchange is defined as the diffusion of gases between the         [ Select ]      ["", "alveoli", "tissues", ""]  and the         [ Select ]      ["tissues", "blood"]  . Under normal conditions,         [ Select ]      ["CO2", "O2"]   moves from the alveoli through the respiratory membrane into the capillary endothelium and then into the blood plasma, while         [ Select ]      ["CO2", "O2"]   moves in the opposite direction from the blood plasma into the capillary endothelial cell through the respiratory membrane and finally into the alveolar sac.

 

Tissue gas exchange is defined as the exchange of O2 and CO2. Under normal conditions,         [ Select ]      ["O2", "CO2"]   moves from the blood into the cells of the tissues, and         [ Select ]      ["O2", "CO2"]  , a waste product of cellular metabolism, moves from the cells of the tissue into the blood plasma. Diffusion is a(n)         [ Select ]      ["passive", "active"]  process that requires that a(n)         [ Select ]      ["gradient", "equilibrium"]  exists between locations. Under normal conditions, O2 and CO2 would move from areas of         [ Select ]      ["high", "low"]  partial pressure to areas of         [ Select ]      ["high", "low"]  partial pressure.

Answer 1:

alveoli

 

Answer 2:

blood

 

Answer 3:

O2

 

Answer 4:

CO2

 

Answer 5:

O2

 

Answer 6:

CO2

 

Answer 7:

passive

 

Answer 8:

gradient

 

Answer 9:

high

 

Answer 10:

low

 

 

Question 6

3 / 3 pts

During respiratory distress, airways can become inflammed. (consider what we discussed last week about bronchitis and asthma).

what would you expect to find if you measured the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in the alveoli, the blood plasma, and the cells of the tissues?

 

In respiratory distress, both O2 and CO2 levels in the air in the alveoli depend on pulmonary ventilation and the integrity of larger airways upstream from the alveolus. If ventilation is minimal due to the inflammation of the airways, it leads to         [ Select ]      ["high", "", "low", ""]  O2 and         [ Select ]      ["low", "high"]  CO2 levels in the alveoli.         [ Select ]      ["Pulmonary", "Tissue"]   gas exchange would continue between blood plasma and the cells of the tissue. Cells would continue to need to obtain         [ Select ]      ["CO2", "O2"]   for cellular respiration and to eliminate         [ Select ]      ["O2", "CO2"]  , a byproduct of metabolism. The         [ Select ]      ["CO2", "O2"]  level would rise in both blood and tissues.

Answer 1:

low

 

Answer 2:

high

 

Answer 3:

Tissue

 

Answer 4:

O2

 

Answer 5:

CO2

 

Answer 6:

CO2

 

Quiz Score: 12 out of 12

PreviousNext

Question 1

1 / 1 pts

What are the three factors we discussed that impact pulmonary ventilation?

  

airway resistance

 

  

alveolar surface tension

 

  

abdominal muscle strength

 

  

lung tissue elasticity

 

 

Question 2

1 / 1 pts

How would factor #1 be affected by inflammation and edema?

Please read carefully, then select the correct dropdown box to identify the factor being described.

        [ Select ]      ["airway resistance", "alevolar surface tension", "lung tissue elasticity"]  is defined as anything that slows the flow of air through the respiratory tract. The         [ Select ]      ["diameter", "length"]  of the airway is the primary factor affecting it. It is the physical factor influencing pulmonary ventilation that would be the most affected by inflammation and edema. Both inflammation and edema would increase this factor by         [ Select ]      ["increasing diameter", "decreasing diameter"]  , increasing the energy and effort needed to move air into and out of the lungs.

Answer 1:

airway resistance

 

Answer 2:

diameter

 

Answer 3:

decreasing diameter

 

 

Question 3

1 / 1 pts

How would factor #2 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

 

alveolar surface tension is a force created by the attraction between water molecules that tends to collapse the alveoli. It could be increased by the increase in fluid in the alveoli from edema.

Answer 1:

alveolar surface tension

 

Answer 2:

increased

 

 

Question 4

1 / 1 pts

How would factor #3 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

lung tissue elasticity refers to the ability of the lungs and the chest wall to stretch. If edema caused an increase in alevolar surface tension , [3] would be reduced, as these parameters share an inverse relationship similar to the relationship between volume and pressure stated by Boyle’s law.

Answer 1:

lung tissue elasticity

 

Answer 2:

alevolar surface tension

 

 

PartialQuestion 5

4 / 5 pts

Define both pulmonary gas exchange and tissue gas exchange.

Your pre-class from last week should help you through this (you can pull out the diagram you labeled tracking the journey of O2 an CO2)--this is a verbal version of the same exercise.

 

Pulmonary gas exchange is defined as the diffusion of gases between the         [ Select ]      ["", "tissues", "alveoli", ""]  and the         [ Select ]      ["tissues", "blood"]  . Under normal conditions,         [ Select ]      ["O2", "CO2"]   moves from the alveoli through the respiratory membrane into the capillary endothelium and then into the blood plasma, while         [ Select ]      ["O2", "CO2"]   moves in the opposite direction from the blood plasma into the capillary endothelial cell through the respiratory membrane and finally into the alveolar sac.

 

Tissue gas exchange is defined as the exchange of O2 and CO2. Under normal conditions,         [ Select ]      ["O2", "CO2"]   moves from the blood into the cells of the tissues, and         [ Select ]      ["CO2", "O2"]  , a waste product of cellular metabolism, moves from the cells of the tissue into the blood plasma. Diffusion is a(n)         [ Select ]      ["passive", "active"]  process that requires that a(n)         [ Select ]      ["equilibrium", "gradient"]  exists between locations. Under normal conditions, O2 and CO2 would move from areas of         [ Select ]      ["high", "low"]  partial pressure to areas of         [ Select ]      ["low", "high"]  partial pressure.

Answer 1:

alveoli

 

Answer 2:

blood

 

Answer 3:

O2

 

Answer 4:

CO2

 

Answer 5:

O2

 

Answer 6:

CO2

 

Answer 7:

active

 

Answer 8:

equilibrium

 

Answer 9:

high

 

Answer 10:

low

 

 

Question 6

3 / 3 pts

During respiratory distress, airways can become inflammed. (consider what we discussed last week about bronchitis and asthma).

what would you expect to find if you measured the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in the alveoli, the blood plasma, and the cells of the tissues?

 

In respiratory distress, both O2 and CO2 levels in the air in the alveoli depend on pulmonary ventilation and the integrity of larger airways upstream from the alveolus. If ventilation is minimal due to the inflammation of the airways, it leads to low O2 and         [ Select ]      ["low", "high"]  CO2 levels in the alveoli.         [ Select ]      ["Tissue", "Pulmonary"]   gas exchange would continue between blood plasma and the cells of the tissue. Cells would continue to need to obtain         [ Select ]      ["CO2", "O2"]   for cellular respiration and to eliminate         [ Select ]      ["CO2", "O2"]  , a byproduct of metabolism. The         [ Select ]      ["O2", "CO2"]  level would rise in both blood and tissues.

Answer 1:

low

 

Answer 2:

high

 

Answer 3:

Tissue

 

Answer 4:

O2

 

Answer 5:

CO2

 

Answer 6:

CO2

 

Quiz Score: 11 out of 12

PreviousNext

 Correct answers will be available on Jun 21 at 12am.

Score for this attempt: 11 out of 12

Submitted Jun 20 at 7:11pm

This attempt took 4 minutes.

 

Question 1

1 / 1 pts

What are the three factors we discussed that impact pulmonary ventilation?

  

alveolar surface tension

 

  

airway resistance

 

  

lung tissue elasticity

 

  

abdominal muscle strength

 

 

Question 2

1 / 1 pts

How would factor #1 be affected by inflammation and edema?

Please read carefully, then select the correct dropdown box to identify the factor being described.

        [ Select ]      ["lung tissue elasticity", "alevolar surface tension", "airway resistance"]  is defined as anything that slows the flow of air through the respiratory tract. The diameter of the airway is the primary factor affecting it. It is the physical factor influencing pulmonary ventilation that would be the most affected by inflammation and edema. Both inflammation and edema would increase this factor by         [ Select ]      ["decreasing diameter", "increasing diameter"]  , increasing the energy and effort needed to move air into and out of the lungs.

Answer 1:

airway resistance

 

Answer 2:

diameter

 

Answer 3:

decreasing diameter

 

 

PartialQuestion 3

0.5 / 1 pts

How would factor #2 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

 

        [ Select ]      ["lung tissue elasticity", "airway resistance", "alveolar surface tension"]  is a force created by the attraction between water molecules that tends to collapse the alveoli. It could be         [ Select ]      ["increased", "decreased"]  by the increase in fluid in the alveoli from edema.

Answer 1:

alveolar surface tension

 

Answer 2:

decreased

 

 

Question 4

1 / 1 pts

How would factor #3 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

lung tissue elasticity refers to the ability of the lungs and the chest wall to stretch. If edema caused an increase in alevolar surface tension , [3] would be reduced, as these parameters share an inverse relationship similar to the relationship between volume and pressure stated by Boyle’s law.

Answer 1:

lung tissue elasticity

 

Answer 2:

alevolar surface tension

 

 

PartialQuestion 5

4.5 / 5 pts

Define both pulmonary gas exchange and tissue gas exchange.

Your pre-class from last week should help you through this (you can pull out the diagram you labeled tracking the journey of O2 an CO2)--this is a verbal version of the same exercise.

 

Pulmonary gas exchange is defined as the diffusion of gases between the         [ Select ]      ["", "alveoli", "tissues", ""]  and the         [ Select ]      ["tissues", "blood"]  . Under normal conditions,         [ Select ]      ["CO2", "O2"]   moves from the alveoli through the respiratory membrane into the capillary endothelium and then into the blood plasma, while         [ Select ]      ["CO2", "O2"]   moves in the opposite direction from the blood plasma into the capillary endothelial cell through the respiratory membrane and finally into the alveolar sac.

 

Tissue gas exchange is defined as the exchange of O2 and CO2. Under normal conditions,         [ Select ]      ["O2", "CO2"]   moves from the blood into the cells of the tissues, and         [ Select ]      ["O2", "CO2"]  , a waste product of cellular metabolism, moves from the cells of the tissue into the blood plasma. Diffusion is a(n)         [ Select ]      ["active", "passive"]  process that requires that a(n)         [ Select ]      ["equilibrium", "gradient"]  exists between locations. Under normal conditions, O2 and CO2 would move from areas of         [ Select ]      ["high", "low"]  partial pressure to areas of         [ Select ]      ["low", "high"]  partial pressure.

Answer 1:

alveoli

 

Answer 2:

blood

 

Answer 3:

O2

 

Answer 4:

CO2

 

Answer 5:

O2

 

Answer 6:

CO2

 

Answer 7:

passive

 

Answer 8:

equilibrium

 

Answer 9:

high

 

Answer 10:

low

 

 

Question 6

3 / 3 pts

During respiratory distress, airways can become inflammed. (consider what we discussed last week about bronchitis and asthma).

what would you expect to find if you measured the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in the alveoli, the blood plasma, and the cells of the tissues?

 

In respiratory distress, both O2 and CO2 levels in the air in the alveoli depend on pulmonary ventilation and the integrity of larger airways upstream from the alveolus. If ventilation is minimal due to the inflammation of the airways, it leads to         [ Select ]      ["low", "high", "", ""]  O2 and         [ Select ]      ["low", "high"]  CO2 levels in the alveoli.         [ Select ]      ["Tissue", "Pulmonary"]   gas exchange would continue between blood plasma and the cells of the tissue. Cells would continue to need to obtain         [ Select ]      ["O2", "CO2"]   for cellular respiration and to eliminate         [ Select ]      ["O2", "CO2"]  , a byproduct of metabolism. The         [ Select ]      ["CO2", "O2"]  level would rise in both blood and tissues.

Answer 1:

low

 

Answer 2:

high

 

Answer 3:

Tissue

 

Answer 4:

O2

 

Answer 5:

CO2

 

Answer 6:

CO2

 

Quiz Score: 11 out of 12

 Correct answers will be available on Jun 21 at 12am.

Score for this attempt: 10 out of 12

Submitted Jun 20 at 7:07pm

This attempt took 4 minutes.

Attempt History

	Attempt	Time	Score
KEPT	Attempt 5	4 minutes	11 out of 12
LATEST	Attempt 5	4 minutes	11 out of 12
	Attempt 4	4 minutes	10 out of 12
	Attempt 3	5 minutes	9.5 out of 12
	Attempt 2	4 minutes	9.67 out of 12
	Attempt 1	120 minutes	8.33 out of 12

 

Question 1

1 / 1 pts

What are the three factors we discussed that impact pulmonary ventilation?

  

airway resistance

 

  

alveolar surface tension

 

  

abdominal muscle strength

 

  

lung tissue elasticity

 

 

Question 2

1 / 1 pts

How would factor #1 be affected by inflammation and edema?

Please read carefully, then select the correct dropdown box to identify the factor being described.

        [ Select ]      ["lung tissue elasticity", "alevolar surface tension", "airway resistance"]  is defined as anything that slows the flow of air through the respiratory tract. The         [ Select ]      ["diameter", "length"]  of the airway is the primary factor affecting it. It is the physical factor influencing pulmonary ventilation that would be the most affected by inflammation and edema. Both inflammation and edema would increase this factor by         [ Select ]      ["decreasing diameter", "increasing diameter"]  , increasing the energy and effort needed to move air into and out of the lungs.

Answer 1:

airway resistance

 

Answer 2:

diameter

 

Answer 3:

decreasing diameter

 

 

PartialQuestion 3

0.5 / 1 pts

How would factor #2 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

 

        [ Select ]      ["airway resistance", "alveolar surface tension", "lung tissue elasticity"]  is a force created by the attraction between water molecules that tends to collapse the alveoli. It could be         [ Select ]      ["decreased", "increased"]  by the increase in fluid in the alveoli from edema.

Answer 1:

alveolar surface tension

 

Answer 2:

decreased

 

 

PartialQuestion 4

0.5 / 1 pts

How would factor #3 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

        [ Select ]      ["alveolar surface tension", "airway resistance", "lung tissue elasticity"]  refers to the ability of the lungs and the chest wall to stretch. If edema caused an increase in         [ Select ]      ["alevolar surface tension", "lung tissue elasticity", "airway resistance"]  , [3] would be reduced, as these parameters share an inverse relationship similar to the relationship between volume and pressure stated by Boyle’s law.

Answer 1:

airway resistance

 

Answer 2:

alevolar surface tension

 

 

PartialQuestion 5

4 / 5 pts

Define both pulmonary gas exchange and tissue gas exchange.

Your pre-class from last week should help you through this (you can pull out the diagram you labeled tracking the journey of O2 an CO2)--this is a verbal version of the same exercise.

 

Pulmonary gas exchange is defined as the diffusion of gases between the tissues and the         [ Select ]      ["tissues", "blood"]  . Under normal conditions,         [ Select ]      ["CO2", "O2"]   moves from the alveoli through the respiratory membrane into the capillary endothelium and then into the blood plasma, while         [ Select ]      ["O2", "CO2"]   moves in the opposite direction from the blood plasma into the capillary endothelial cell through the respiratory membrane and finally into the alveolar sac.

 

Tissue gas exchange is defined as the exchange of O2 and CO2. Under normal conditions,         [ Select ]      ["CO2", "O2"]   moves from the blood into the cells of the tissues, and         [ Select ]      ["CO2", "O2"]  , a waste product of cellular metabolism, moves from the cells of the tissue into the blood plasma. Diffusion is a(n)         [ Select ]      ["passive", "active"]  process that requires that a(n)         [ Select ]      ["equilibrium", "gradient"]  exists between locations. Under normal conditions, O2 and CO2 would move from areas of         [ Select ]      ["high", "low"]  partial pressure to areas of         [ Select ]      ["low", "high"]  partial pressure.

Answer 1:

tissues

 

Answer 2:

blood

 

Answer 3:

O2

 

Answer 4:

CO2

 

Answer 5:

O2

 

Answer 6:

CO2

 

Answer 7:

passive

 

Answer 8:

equilibrium

 

Answer 9:

high

 

Answer 10:

low

 

 

Question 6

3 / 3 pts

During respiratory distress, airways can become inflammed. (consider what we discussed last week about bronchitis and asthma).

what would you expect to find if you measured the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in the alveoli, the blood plasma, and the cells of the tissues?

 

In respiratory distress, both O2 and CO2 levels in the air in the alveoli depend on pulmonary ventilation and the integrity of larger airways upstream from the alveolus. If ventilation is minimal due to the inflammation of the airways, it leads to         [ Select ]      ["", "low", "high", ""]  O2 and high CO2 levels in the alveoli.         [ Select ]      ["Pulmonary", "Tissue"]   gas exchange would continue between blood plasma and the cells of the tissue. Cells would continue to need to obtain         [ Select ]      ["CO2", "O2"]   for cellular respiration and to eliminate         [ Select ]      ["CO2", "O2"]  , a byproduct of metabolism. The CO2 level would rise in both blood and tissues.

Answer 1:

low

 

Answer 2:

high

 

Answer 3:

Tissue

 

Answer 4:

O2

 

Answer 5:

CO2

 

Answer 6:

CO2

 

Quiz Score: 10 out of 12

PartialQuestion 1

0.67 / 1 pts

What are the three factors we discussed that impact pulmonary ventilation?

  

airway resistance

 

  

alveolar surface tension

 

  

lung tissue elasticity

 

  

abdominal muscle strength

 

 

Question 2

1 / 1 pts

How would factor #1 be affected by inflammation and edema?

Please read carefully, then select the correct dropdown box to identify the factor being described.

        [ Select ]      ["airway resistance", "alevolar surface tension", "lung tissue elasticity"]  is defined as anything that slows the flow of air through the respiratory tract. The         [ Select ]      ["diameter", "length"]  of the airway is the primary factor affecting it. It is the physical factor influencing pulmonary ventilation that would be the most affected by inflammation and edema. Both inflammation and edema would increase this factor by decreasing diameter , increasing the energy and effort needed to move air into and out of the lungs.

Answer 1:

airway resistance

 

Answer 2:

diameter

 

Answer 3:

decreasing diameter

 

 

PartialQuestion 3

0.5 / 1 pts

How would factor #2 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

 

alveolar surface tension is a force created by the attraction between water molecules that tends to collapse the alveoli. It could be decreased by the increase in fluid in the alveoli from edema.

Answer 1:

alveolar surface tension

 

Answer 2:

decreased

 

 

Question 4

1 / 1 pts

How would factor #3 be affected by inflammation and edema?

Please read carefully, then select the correct drop down option to identify the factor being described.

        [ Select ]      ["alveolar surface tension", "lung tissue elasticity", "airway resistance"]  refers to the ability of the lungs and the chest wall to stretch. If edema caused an increase in         [ Select ]      ["lung tissue elasticity", "alevolar surface tension", "airway resistance"]  , [3] would be reduced, as these parameters share an inverse relationship similar to the relationship between volume and pressure stated by Boyle’s law.

Answer 1:

lung tissue elasticity

 

Answer 2:

alevolar surface tension

 

 

PartialQuestion 5

3.5 / 5 pts

Define both pulmonary gas exchange and tissue gas exchange.

Your pre-class from last week should help you through this (you can pull out the diagram you labeled tracking the journey of O2 an CO2)--this is a verbal version of the same exercise.

 

Pulmonary gas exchange is defined as the diffusion of gases between the tissues and the         [ Select ]      ["blood", "tissues"]  . Under normal conditions,         [ Select ]      ["CO2", "O2"]   moves from the alveoli through the respiratory membrane into the capillary endothelium and then into the blood plasma, while         [ Select ]      ["CO2", "O2"]   moves in the opposite direction from the blood plasma into the capillary endothelial cell through the respiratory membrane and finally into the alveolar sac.

 

Tissue gas exchange is defined as the exchange of O2 and CO2. Under normal conditions,         [ Select ]      ["O2", "CO2"]   moves from the blood into the cells of the tissues, and         [ Select ]      ["CO2", "O2"]  , a waste product of cellular metabolism, moves from the cells of the tissue into the blood plasma. Diffusion is a(n)         [ Select ]      ["active", "passive"]  process that requires that a(n)         [ Select ]      ["equilibrium", "gradient"]  exists between locations. Under normal conditions, O2 and CO2 would move from areas of         [ Select ]      ["high", "low"]  partial pressure to areas of         [ Select ]      ["high", "low"]  partial pressure.

Answer 1:

tissues

 

Answer 2:

blood

 

Answer 3:

O2

 

Answer 4:

CO2

 

Answer 5:

O2

 

Answer 6:

CO2

 

Answer 7:

passive

 

Answer 8:

gradient

 

Answer 9:

low

 

Answer 10:

high

 

 

Question 6

3 / 3 pts

During respiratory distress, airways can become inflammed. (consider what we discussed last week about bronchitis and asthma).

what would you expect to find if you measured the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in the alveoli, the blood plasma, and the cells of the tissues?

 

In respiratory distress, both O2 and CO2 levels in the air in the alveoli depend on pulmonary ventilation and the integrity of larger airways upstream from the alveolus. If ventilation is minimal due to the inflammation of the airways, it leads to         [ Select ]      ["low", "", "high", ""]  O2 and         [ Select ]      ["high", "low"]  CO2 levels in the alveoli.         [ Select ]      ["Pulmonary", "Tissue"]   gas exchange would continue between blood plasma and the cells of the tissue. Cells would continue to need to obtain         [ Select ]      ["O2", "CO2"]   for cellular respiration and to eliminate CO2 , a byproduct of metabolism. The         [ Select ]      ["CO2", "O2"]  level would rise in both blood and tissues.

Answer 1:

low

 

Answer 2:

high

 

Answer 3:

Tissue

 

Answer 4:

O2

 

Answer 5:

CO2

 

Answer 6:

CO2