5. Contraction of the diaphragm decreases the volume of the thoracic cavity. Tru

Question

5. Contraction of the diaphragm decreases the volume of the thoracic cavity. True/False) 6. Which of the following is not a component of the respiratory membrane? (Circle one.) a. capillary endothelial cell b. fused basement membranes c. type I cell d. type ll cell 7. Which of the following are cells that produce surfactant? (Circle one. a. alveolar macrophages b. capillary endothelial cell c. fused basement membranes d. type I cell e. type Il cell lobar/main/segmentall bronchus leads into a lobe 8. A lobar/main/segmental) bronchus leads into each lung: a of a lung; a lobar/main/segmental) bronchus leads into a bronchopulmonary segment. (parietal/visceral) pleura lines 9. The parietal/visceral) pleura covers the outer surface of each lung, whereas the the inner surfaces of the thoracic cavity lconducting/respiratory) division of the respiratory tree contain alveoli. 10. Structures that compose the 653 Chapter Twenty-Four The Respiratory System

Explanation / Answer

Answers:-

5:- False

Because contraction of diaphragm makes it tighten which increase the volume of thoracic cavity and help in breathing the air in.

6:- d) type 2 cell

The components of respiratory membrane are basement membrane, capillary endothecium, alveolar epithelium cells and type 1 cells ( squamous epithelial cells). Type 2 cells are surfactant cells which secret pulmonary surfactant to decrease the surface tension of water & keeps the alveoli dry. This is not a component of respiratory membrane.

7:- e) type 2 cell

Type 2 cells is also known as surfactant cells as they secret pulmonary surfactant to decrease the surface tension of water in the alveoli.

8:- main, lobar, segmental

Explanation:- Bronchus is of 3 types;

Primary bronchi ( main) - which enters into the lungs.

Secondary bronchi ( lobar) - which deliver oxygen to the lobes of the lungs.

Tertiary bronchi ( segmental) - which leads to bronchopulmonary segment.

9:- visceral, parietal

Explanation:- There are two layers of pleural membrane. 1. Outer or parietal layer which lines the inside of rib cage (thoracic cavity). 2. Inner or visceral layer which covers the lungs.

10:- respiratory

Explanation:- Respiratory zone is found deep inside the lungs consists of bronchioles, alveolar ducts, and alveoli. These are thin walled structures and allow the exchange of gases into the lungs capillaries.

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