The Movement of Substances to Regions of Lower Concentration Is

question 15

Multiple Choice

The movement of substances to regions of lower concentration is called

• A)active transport.
• B)diffusion.
• C)osmosis.
• D)pumping.
• E)exocytosis.

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Definitions:

Drug Sensitization

An increase in the responsiveness to a substance following repeated exposure, often leading to enhanced effects of the drug.

Stress Response

The body's reaction to a challenge or demand, involving physiological changes such as increased heart rate and hormonal adjustments.

Homeostasis

The self-regulating process by which biological systems maintain stability while adjusting to conditions that are optimal for survival.

Blood-Brain Barrier

The blood-brain barrier is a selective semipermeable border that prevents most substances in the blood from entering the brain, thus protecting it from pathogens and toxins while allowing essential nutrients to pass through.