A Substance That Blocks Receptor Sites So That the Illicit

question 55

Multiple Choice

A substance that blocks receptor sites so that the illicit drug does not produce an effect is called ______.

• A) aversive
• B) antagonist
• C) agonist
• D) appetitive

---

Definitions:

Trabeculae Carnea

A series of muscular ridges found inside the ventricles of the heart, contributing to the heart's contractile force.

Epicardium

The outermost layer of the heart wall composed of connective tissue and fat, serving as a protective layer.

Parietal Pericardium

The outer fibrous layer of the pericardium, a double-walled sac containing the heart and the roots of the major blood vessels.

Endocardium

The innermost layer of tissue that lines the chambers of the heart.