RS1 Lung structure and Function

Question 1

The resp system contributes to homeostasis by providing for the exchange of gases _____ and ____ between the _______ and _______

Answer 1

oxygen and carbon dioxide
Atmosphere and pulmonary blood

Question 2

Systemic oxygen transport = __ x___

Answer 2

Cardiac output x Arterial oxygen content (CaO2)

Question 3

PaO2 assesses..

Answer 3

Partial pressure of arterial oxygen measures the oxygenation

Question 4

PaCO2

Answer 4

Partial arterial pressure of CO2 measures ventilation

Question 5

What are 3 non-respiratory functions of the lungs

Answer 5

1. Host defense - primary barrier b/w the outside world and inside of body (large SA larger than skin)
2. Synthesizes and metabolizes compounds
3. FIlters toxic materials

Question 6

Where does gas exhange occur?

Answer 6

alveoli

Question 7

Alveolar-capillary units demonstrate ____ this is, each unit is _______ and ______ like every other unit

Answer 7

functional unity, structurally identical and functions

Question 8

How does gas get to the alveoli?

Answer 8

ventilation

Question 9

How does gas get across the blood-gas barrier?

Answer 9

Diffusion from high partial pressure to low partial pressure

Question 10

How does the pulmonary circulation remove gas from the lungs?

Answer 10

Blood flow

Question 11

What is a ventilation perfusion relationship

Answer 11

How matching of gas and blood dtermines gas exchange

Question 12

How are gases moved to the peripgheral tissues?

Answer 12

Transport by blood

Question 13

Topography

Answer 13

the distribution of parts or features on the surface of or within an organ or organism

Question 14

Mediastinum

Answer 14

The central compartment of thoracic cavity surrounded by loose connective tissue