Which of the Following Statements Concerning Blood Vessel Walls Is

question 19

Multiple Choice

Which of the following statements concerning blood vessel walls is true?

• A) The tunica intima is the innermost layer of a blood vessel wall.
• B) The tunica media is found in all blood vessels except veins.
• C) The tunica adventitia is composed of smooth muscle and endothelium.
• D) Capillaries have both a tunica intima and a tunica media.
• E) Vessel diameter is controlled primarily by the tunica intima.

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Definitions:

DNA Strand

One of the two long chains of nucleotides that form the double helix structure of DNA, carrying genetic information.

mRNA

Messenger RNA, a type of RNA that conveys genetic information from DNA to the ribosome, where it specifies the amino acid sequence of the protein products.

Amino Acid Sequences

The order of amino acids in a protein, which determines the protein's structure, function, and properties.

Ribosomes

Cellular structures that synthesize proteins by translating mRNA into polypeptide chains.