Respiratory System, Respiratory Flashcards
0
Q
- Skeleton: NONE
- Glands: NONE
- Epithelium: Simple squamous
(2 answers)
A
Alveolar Ducts and Alveoli
1
Q
- Skeleton: Smooth muscle (some)
- Glands: NONE
- Epithelium: Simple cuboidal, Simple epithelium
A
Respiratory Bronchioles
2
Q
Which of the three “organs” have cilia?
A
Respiratory Bronchiolies (have some)
3
Q
None of the “organs” have ________ or _______ cells.
A
glands or goblet cells
4
Q
- Special Cells:
- Out pocketing of alveoli
A
Respiratory Bronchioles
5
Q
- Special Cells:
- Out pocketing of alveoli
- Pneumocytes (Alveolar cells)
- Type I
- Type II
- Dust cells
A
Alveolar Ducts
6
Q
- Special Cells:
- Type I and Type II pneumocytes
- Dust cells
A
Alveoli
7
Q
Type I, Type II, or Dust:
- Thin, squamous
- Line most (95%) of each alveolus
- Tight (occluding) junctions
- Non-dividing
A
Type I
8
Q
Type I, Type II, or Dust:
- Aka Septal cells
- Line remaining (5%) of each alveolus
- Plump cells that bulge at alveolar space
- Secrete surfactant (reduce surface tension)
- Progenitor cells for Type I and Type II
A
Type II
9
Q
Type I, Type II, or Dust:
- Aka Alveolar Macrophages
- In both CT of septum and air space
- Derived from monocytes
- Scavenge to remove inhaled particulates
A
Dust Cells
10
Q
What is the order of “organs” in the Respiratory division?
A
- Respiratory Bronchioles
- Alveolar Ducts
- Alveoli
11
Q
Interalveolar Septum: Thick or Thin
- Type I pneumocytes, capillary epithelium, fused basal lamina of both cells
- Highly vascularized, supported by CT
- Extends to lumen
- Forms air-blood barrier
- Responsible for most of gas exchange in lungs
A
Thin Portion
12
Q
Interalveolar Septum: Thick or Thin
- Collagen and Elastic fibers, capillaries, basement membrane
- Type I and II pneumocytes, fibroblasts, dust cells (alveolar macrophages)
A
Thick Portion
13
Q
What includes the thin, squamous, epithelial layer that lines the alveolar walls and pulmonary capillaries that cover the external surfaces of alveoli?
A
Air-blood barrier (Respiratory Membrane)
