Opiates Have a Molecular Structure That Is Similar to Endorphins,our

question 20

Multiple Choice

Opiates have a molecular structure that is similar to endorphins,our body's natural pain relievers.When Ahmed takes cold medicine with codeine in hopes of relieving a headache,the codeine stimulates the receptor sites that receive endorphins.Codeine is therefore a/an

• A) agonist.
• B) antagonist.
• C) antipsychotic.
• D) amphetamine.

---

Definitions:

Incomplete Dominance

A genetic phenomenon where neither allele of a gene fully dominates the other, resulting in a phenotype that is a blend or intermediate between the two parent alleles.

Codominance

A genetic scenario where two alleles of a gene are expressed equally in the phenotype of the organism.

Polygenic

Relating to or resulting from the influence of multiple genes, especially with regard to traits that exhibit a continuous distribution in the population.

Skin Color

The pigmentation of the skin, primarily determined by genetic inheritance influencing the amount and type of melanin produced.