Chapter 9: 9.2 - Gas Exchange and Transport

Question 1

What is Dalton’s Law of Partial Pressure?

Answer 1

Each gas in a mixture exerts or applies its own pressure.

Question 2

How much oxygen does it diffuse from the air into the lungs?

Answer 2

21.2 kPA

Question 3

How much in the alveoli?

Answer 3

13.3 kPA

Question 4

Where does arteries carry blood from?

Answer 4

The heart

Question 5

Where does veins take blood back to?

Answer 5

The Heart

Question 6

Who joins the arteries and the veins?

Answer 6

The Capillaries

Question 7

What does oxygen diffuse into?

Answer 7

Cells

Question 8

What does carbon dioxide diffuse out of?

Answer 8

Cells

Question 9

How is the movement of oxygen?

Answer 9

atmosphere → alveoli → blood → dissolves in the plasma

Question 10

Is Oxygen soluble in the blood?

Answer 10

It is not very soluble.

Question 11

What is Hemoglobin?

Answer 11

Oxygen-carrying molecule in red blood cells.

Question 12

What is Hemoglobin comprised of?

Answer 12

• Heme (iron-containing pigment)

- Globin - (protein component)

Question 13

What is oxyhemoglobin?

Answer 13

When oxygen dissolves in the plasma, hemoglobin creates a weak bond with the oxygen molecule.

Question 14

What is the Partial Pressure for the lungs?

Answer 14

13.3 kPA

Question 15

What is the Partial Pressure for the Capillaries?

Answer 15

5.3 kPA

Question 16

What happens if there is an decrease in partial pressure?

Answer 16

It causes dissociation or a split of oxygen from the hemoglobin and oxygen diffuses into the tissues.

Question 17

How much hemoglobin is still saturated when blood goes back to the heart?

Answer 17

70%

Question 18

What are the 3 methods for transporting carbon dioxide?

Answer 18

1. Bicarbonate (HCO-3)
2. Carbaminohemoglobin (HbCo2) (CO2 + Hb) = (HbCO2)
3. Dissolves in plasma

Question 19

What is Carbaminohemoglobin?

Answer 19

It is when 27% of the body’s carbon dioxide combines or merges with hemoglobin.

Question 20

What is Carbonic Acid?

Answer 20

It is when the left over 64% of the body’s carbon dioxide combines or merges with water in the plasma.
- Reduces the concentration of plasma.n

Question 21

What is Carbonic Anyhdrase?

Answer 21

It grows the rate of chemical reaction approximately 250 times.

Question 22

What is Reduced Hemoglobin?

Answer 22

It’s when hydrogen combines with Hemoglobin.

Question 23

What is the partial pressure from?

Answer 23

High partial pressure to low partial pressure

Question 24

During exercise what happens?

Answer 24

• The cellular respiration grows, and then it carbon dioxide levels to grow.
• Stimulates chemical receptors in brainstem muscles.
• Increases breathing movements in order to flush CO2 from body.

Question 25

What is partial pressure gradient?

Answer 25

When the exchange of oxygen and carbon dioxide happens across the capillaries.

Question 26

How firm is carbonic acid?

Answer 26

It is not firm or unstable, what it does is that it dissociates bicarbonate ions and hydrogen ions.