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L2_ Respiratory part of respiratory system_ Histo

 Lecture video



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Questions

1-Which of the following airways has the greatest relative amount of smooth muscle?
A. Nasal cavity
B. Larynx
C. Trachea
D. Bronchi
E. Bronchioles

2-Which of the following is NOT found in the interalveolar septum?
A. smooth myocytes
B. elastic fibers
C. fibroblasts
D. endothelial cells
E. collagen fibers

3-The epithelial lining of a lobar bronchus is which of the following tissue types?
A. Simple columnar
B. Ciliated pseudostratified
C. Stratified squamous
D. Transitional
E. Simple squamous

4-In a section of lung tissue consisting predominantly of alveoli,a tubule about 2 mm in diameter is observed that contains smooth muscle and cartilage in its wall. The tubule is which one
of the following?
A. Alveolar duct
B. Alveolar sac
C. Bronchiole
D. Bronchus
E. Trachea

5-In which of the following are goblet cells most frequent?
A. trachea
B. bronchus
C. bronchiole
D. alveolus
E. The frequency of goblet cells in each of the above is about equal.

6-As respiratory passages branch from trachea to bronchioles, the epithelium gradually changes from:
A. simple squamous to ciliated pseudostratified columnar.
B. simple columnar to simple squamous
C. simple cuboidal to simple columnar
D. stratified squamous to simple squamous
E. ciliated, pseudostratified columnar to simple cuboidal.

7-Simple squamous epithelium lines the:
A. nasal cavities
B. crypts of pharyngeal tonsils
C. bronchil
D. trachea
E. alveoli

8-Alveolar dust cells (macrophages) are:
A. cuboidal cells that secrete surfactant
B. squamous cells involved in gas exchange
C. ciliated cells that move mucous
D. columnar cells that secrete mucous
E. amoeboid that clean the alveolar surface

9-C-shaped rings that form the framework of the trachea and help keep it open are composed of:
A. fibro-elastic tissue
B. trachealis muscle
C. skeletal muscle
D. hyaline cartilage
E. bone

10-Which of the following is devoid of hyaline cartilage?
A. trachea
B. bronchus
C. larynx
D. bronchiole
E. none of the above



Answers


1_e
2_a
3_b
4_d
5_a
6_e
7_e
8_e
9_d
10_d














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