Module 3.2 - Biomass Transport II (O2 transport I)

Question 1

Alveolar pores have _____ and are ______

Answer 1

Thin cell layers

Expansive

Question 2

Oxygen travels through ___ membranes and ___ layers of water before reaching the RBC

Answer 2

5, 6

Question 3

Oxygen concentration _________ as it moves from the alveolar Type-I epithelial cell to the RBC

Answer 3

Decreases

Question 4

Surfactant

Answer 4

Present in alveolar sacks, prevents alveoli from collapsing and staying closed

Question 5

Each step in the process of O2 diffusing across membranes has a respective _________

Answer 5

Resistance

Question 6

Hemoglobin structure

Answer 6

4 units of heme groups (each one combined holds 1 molecule of O2)

Question 7

Oxyhemoglobin

Answer 7

Hemoglobin + O2 molecule

Question 8

T/F: Majority of O2 in blood is dissolved O2

Answer 8

F: Majority is bound to Hb, the rest is dissolved O2 in blood

Question 9

T/F: if all our blood was diffused in our bloodstream directly, our heart would be smaller in size

Answer 9

T

Question 10

Saturation fraction of hemoglobin in blood

Answer 10

The fraction of total hemoglobin which happens to be oxygenated

Question 11

O2 has to leave the tissues… what are the 3 main mechanisms that encourage this? How?

Answer 11

pH = as tissue gets more acidic with O2, O2 is more likely to leave heme

Temperature = start to exercise, temp increases and O2 more likely to come off

Effects of P_CO2 = CO2 also increases acidity of blood