Introduction:
Arteries and veins consist of epithelial cells which collectively form a layer of endothelium. Endothelium layer is surrounded by layers of connective tissues consisting of smooth muscle cells, and connective tissue.
Answer to Problem 1MC
Correct answer:
Endothelium, connective tissue, and smooth muscle describe the layers of the wall of arteries and veins from inside to outside. Therefore, option (b) is correct.
Option (b) is given as “endothelium, smooth muscle, connective tissue”.
Explanation of Solution
Justify reason for the correct statement:
The thick wall of arteries consists of three tunics; tunica interna contain endothelial lining, tunica media contain smooth muscle and elastic tissue, and tunica externa consist of connective tissue.
Hence, option (b) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as “endothelium, connective tissue, smooth muscle cells”.
Arteries and veins contain endothelium, surrounded by smooth muscle and then connective tissue. Hence, it is a wrong answer.
Option (c) is given as “smooth muscle, connective tissue, and endothelium”.
Endothelium forms the most internal layer of the wall of arteries and veins. Hence, it is a wrong answer.
Option (d) is given as “connective tissue”.
Connective tissue forms the outer most layer of arteries and veins. Hence, it is a wrong answer.
Hence, options (a), (c), and (d) are incorrect.
The thick wall of arteries consists of three tunics; the innermost endothelial lining, a middle layer of smooth muscle and elastic tissue, and the outer most layer of connective tissue.
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Chapter 33 Solutions
Biology
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