Question

14. A. Two slides - section of skeletal muscle and smooth muscle are shown under the microscope. How will you identify the two slides.

B. Name the type of epithelium that lines the air sac of the lungs and the function of that epithelium.​

Answer 1

A. Smooth muscle is organized in two ways: as single-unit smooth muscle, which is much more common; and as multiunit smooth muscle. The two types have different locations in the body and have different characteristics.

B. The majority of the respiratory tree, from the nasal cavity to the bronchi, is lined by pseudostratified columnar ciliated epithelium. The bronchioles are lined by simple columnar to the cuboidal epithelium, and the alveoli possess a lining of thin squamous epithelium that allows for gas exchange.

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