Transport of Materials Across a Cell Membrane

question 24

Multiple Choice

Transport of materials across a cell membrane

• A)is selective.
• B)always takes place from a region of greater concentration to a region of lesser concentration.
• C)is an energy-requiring process regardless of the chemical properties of the substance being transported.
• D)requires a carrier molecule in the membrane regardless of the chemical properties of the substance being transported.

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Definitions:

Gases

Substances that exist in the gaseous state under standard conditions of temperature and pressure, often used as fuel, in industrial processes, or in refrigeration systems.

Liquids

Fluid substances that flow freely, have a consistent volume under standard conditions, and adapt to the shape of their containers.

Pressure Gauge

A device used to measure the pressure of gases or liquids in a system, crucial for monitoring and ensuring safe operating conditions.

Manometer

A single tube bent into a U-shape and mounted to a linear measuring scale. It may be filled to the zero on the calibration scale with either water (H2O) or mercury (Hg), depending on the pressure range to be measured.