Respiratory System Flashcards Preview

BIOLOGY 1103 > Respiratory System > Flashcards

Flashcards in Respiratory System Deck (15):
1

Cellular respiration

Breakdown of organic molecules to obtain energy, frequently requiring oxygen

2

Respiratory Exchange

Exchange of gases (CO2 and O2) between an organism and its environment

3

Larynx

Vocal cords: folds of mucous membrane

4

Right and left lobes of the lungs

Right 3, left 2

5

3 types of cells in alveoli

Alveolar cells
surfactant-secreting cells
alveolar macrophages

6

Alveolar cells

Thin (simple squamous) for gas exchange

7

Surfactant secreting cells

Secrete surfactant (duh) fluid that lines inside surface of alveoli to prevent collapse during expiration

8

alveolar macrophages

Defend against foreign material not removes by mucus and cilia

9

Ventilation

Mechanical.
Flow of air between the atmosphere and the lungs due to the difference of air pressure

10

Pressure change during inhalation

Air pressure in the lungs increases
pressure inside less than pressure outside (therefore air flows in)
air enters lungs down the pressure gradient

11

Pressure change during exhalation

Pressure inside greater than pressure outside

12

Carbon dioxide is transported by binding to

hemoglobin. binds to the globin group

13

Tidal volume

volume of air inspired in normal, quiet breathing

14

Inspiratory reserve volume

volume inspired during a very deep inhalation

15

Expiratory reserve volume

volume expired during a forced exhalation