The Movement of Substances from Higher to Lower Concentration Across

question 57

Multiple Choice

The movement of substances from higher to lower concentration across a semipermeable membrane via a specific protein carrier but without energy expenditure is called ______.

• A) osmosis
• B) diffusion
• C) facilitated diffusion
• D) endocytosis
• E) active transport

---

Definitions:

Pill-Rolling

A type of tremor characteristic of Parkinson's disease, resembling the motion of rolling a small object or pill between the thumb and forefinger.

Increased Intracranial Pressure

Elevated pressure within the skull, which can lead to neurological issues and requires immediate medical attention.

Pupils

The central, circular openings in the iris of the eye that regulate the amount of light entering the eye.

Dilated

The condition of being widened or expanded in diameter.