Module 20 pt 2

Question 1

This is a law stating total pressure exerted by a mixture of gas is the sum of the pressures exerted by each gas

Answer 1

Daltons Law

Question 2

When a mixture of gas is in contact with a liquid, each gas will dissolve in the liquid in proportion to its partial pressure

Answer 2

Henrys Law

Question 3

____ is 20 times more soluble in water than

Answer 3

CO2

O2

Question 4

What is external respiration influenced by?

Answer 4

Partial pressure gradients
Ventilation-perfusion coupling
Structure of Respiratory membrane

Question 5

What is the partial pressure gradient like in the lungs for O2 compared to CO2

Answer 5

O2 is more steep ( 40 to 104)

CO2 is not as much (45 to 40)

Question 6

How does CO2 diffuse with O2?

Answer 6

In equal amounts

Question 7

This is the amount of gas reaching the alveoli

Answer 7

Ventilation

Question 8

This is the blood flow reaching the alveoli

Answer 8

Perfusion

Question 9

Ventilation and perfusion must be _______ for efficient gas exchange

Answer 9

matched

Question 10

Changes in ___ causes changes in the diameters of the arterioles

Answer 10

PO2

Question 11

Changes in __ causes changes in the diameters of the bronchioles

Answer 11

PCO2

Question 12

This is a term known for when the walls of adjacent alveoli break down

Answer 12

Emphysema

Question 13

Internal respiration partial pressures are _____ to those of external partial pressure

Answer 13

reversed

Question 14

When levels raise there is ____

When levels are too lose there is ____

Answer 14

Dilation

Constriction

Question 15

What are the two ways oxygen is carried in the blood?

Answer 15

Carried by hemoglobin

Dissolved in plasma

Question 16

What is the relationship of P02 on hemoglobin saturation?

Answer 16

If one increases they both increase

Question 17

Where is Hb almost completely saturated at PO2?

Answer 17

70

Question 18

A small drop in PO2 will cause what?

Answer 18

A large increase in unloading

Question 19

What does an increase in temperature do to the PO2 and Hemo relationship?

Answer 19

Causes a decrease of affinity