Which Structure Has Four Layers: Epithelial Cells, Substantia Propria, Elastic

question 49

Multiple Choice

Which structure has four layers: epithelial cells, substantia propria, elastic lamina, and endothelial cells?

• A) cornea
• B) crystalline lens
• C) macula
• D) retina

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Definitions:

Nicotine

Nicotine is a stimulant drug found in tobacco products, known for its addictive properties and effects on the central nervous system.

Stimulant

A substance that raises levels of physiological or nervous activity in the body.

Depressant

A class of drugs that reduce the functionality of the nervous system, leading to decreased arousal or stimulation in areas of the brain.

Narcotic

A class of drugs that reduce pain, induce sleep, and may alter mood or behavior; often used medicinally but can lead to dependency.