Chapter Twenty Four The Respiratory System 529 24. Label the structures In the f

Question

Chapter Twenty Four The Respiratory System 529 24. Label the structures In the figure. Then st, in order, the three structures through which a moiscule of carbon diowide must travel im oraer to diffuse from the blood into the alveo Dirfusion of CO DiTTusian of Oa 10 25. Hyaline membrane disease of the newborn, a disease in which the infant experiences great ditficulty breathing, is characterized by a lack of pulmonary surfactant production. Which cells within the lung are responsible for producing surfactant? 26. The following questions refer to the micrograph shown here. What type of airway is indicated in this micrograph? (The star is in the lumen of the alrway in question.) a. b. Explain the reasoning for the answer to part (a) of this questlon. That is, explaln the histological features of the airway (epithelium, cartilage, etc.) that were used to determine the answer o Christine Eckel

Explanation / Answer

Ans 24.the carbon di oxide diffuses from blood into the alveoli.the layer that it closes are in sequence as

A....capillary endothelium of.blood vessel

B... basement membrane between the two

C... stratified squamous epithilieum of Alveoli.

Ans 25.. surfactant in the alveoli is produced by Epithelial Type 2 cells..the deficiency of surfactant in neonates is defined as Hyaline membrane diseases.in adults if the deficeidef occurs it causes features of ARDS.

Ans 26..a...the histoligical diagram marked in question is of BRONCHUS BRONCHIOLE

B....the following features are important

Bronchiole is lined by simple columnar or cuboidal epithelium surrounded by bundles of.smooth muscle cells as seen in the diagram.

Arteries are seen.near the bronchioles.

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