Lecture 43- Respiratory System Part 3

Question 1

What is diffusion? How can it become more efficient in gas exchange?

Answer 1

Movement from a region of higher concentration to lower concentration

Distance for diffusion is short

Question 2

What is Fick’s Law?

Answer 2

Diffusion rate is increased by larger surface area, smaller membrane thickness, smaller molecules, and more O2 available

Question 3

What is Henry’s Law?

Answer 3

Gasses will dissolve into solution in proportion to their partial pressure in order to reach equilibrium

Question 4

What does the amount of gas dissolving in a liquid depend on?

Answer 4

Solubility

Question 5

What transports oxygen?

Answer 5

Hemoglobin

Question 6

When O2 binds to hemoglobin, a conformational change occurs in the other subunits, which make binding of O2 ______ likely.

Answer 6

More

Question 7

Where does oxyhemoglobin occur?

Answer 7

Lungs

Question 8

Where does deoxyhemoglobin occur?

Answer 8

Tissues

Question 9

What is cooperatively in regards to oxygen binding sites?

Answer 9

When one molecule of O2 binds which causes a conformational change that makes other heme units more accessible to oxygen

Note that this creates the sigmoidal curve

Question 10

Will air pressure and air density increase/decrease/stay the same when altitude increases?

Answer 10

Decrease

Question 11

True or false:

The composition of air will change when there is a change in altitude?

Answer 11

FALSE

Composition of air does not change with altitude

Question 12

What is Dalton’s Law?

Answer 12

Total pressure=sum of each gas pressure