When Dissecting a Specimen,Barry Noticed That the Arteries Were Thicker

question 20

Multiple Choice

When dissecting a specimen,Barry noticed that the arteries were thicker and more elastic than the veins.Why?

• A) Veins return blood to the heart against gravity.
• B) Arteries contain a greater volume of blood.
• C) Veins have valves.
• D) Arteries are under greater pressure.
• E) Arteries have less smooth muscle than veins.

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Definitions:

Heterozygous

Referring to an organism that has two different alleles for a specific gene, one inherited from each parent.

Dominant Allele

An allele that expresses its phenotypic effect even when heterozygous with a recessive allele.

Recessive Allele

A variant of a gene that must be inherited from both parents in order to manifest its trait, as opposed to a dominant allele where only one copy is needed for expression.