A Mechanism in Which Two Substances Move in Opposite Directions

question 78

Multiple Choice

A mechanism in which two substances move in opposite directions across the cell membrane is called

• A) facilitated diffusion.
• B) vesicular transport.
• C) endocytosis.
• D) countertransport.
• E) osmosis.

---

Definitions:

Hypomania

A milder form of mania, characterized by elevated or irritable mood, increased activity or energy levels, but not severe enough to cause significant impairment.

Depression

A common mental disorder characterized by persistent sadness, loss of interest, and a lack of energy or drive, often accompanied by physical symptoms.

Rapid Cycling

A term in bipolar disorder characterized by four or more episodes of mania, hypomania, or depression within a year.

Melancholic

Characterized by a profound presentation of depression, often with significant changes in appetite, sleep, and energy levels, and marked by feelings of sorrow, hopelessness, or inadequacy.