Stem Cells Are

question 449

Multiple Choice

Stem cells are:

• A) long, threadlike structures composed of twisted parallel strands of deoxyribonucleic acid.
• B) cells that can divide indefinitely, renew themselves, and give rise to a variety of other types of cells.
• C) cells that have mutated or spontaneously changed during transmission from one generation to the next.
• D) cells that have been damaged by environmental factors, such as exposure to ultraviolet light, radiation, or chemical toxins.

---

Definitions:

Amphetamines

A class of stimulant drugs that increase activity in the brain and are used to treat conditions like ADHD and narcolepsy.

Disorganized Behavior

Actions or behaviors that are erratic, unpredictable, and lack a clear purpose or goal.

Hallucinations

Sensory experiences that appear real to the individual but are created by the mind, without an external stimulus.

Heart Disease

A range of conditions that affect the heart, including coronary artery disease, heart attack, heart failure, and arrhythmias.