Surface Tension

question 40

Multiple Choice

Surface tension

• A)increases with increasing temperature.
• B)is unaffected by temperature.
• C)is higher for nonpolar substances than for polar ones.
• D)is lowered by surfactants.
• E)is the same as viscosity.

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Definitions:

Membrane-bound Receptor

A type of cell receptor that is anchored in the cell membrane and interacts with extracellular molecules to trigger signals within the cell.

G Proteins

Guanine nucleotide-binding proteins that act as molecular switches inside cells, involved in transmitting signals from a variety of stimuli outside a cell to its interior.

Cyclic AMP

A secondary messenger important in many biological processes, such as the regulation of metabolism.

Lipid-soluble Hormones

Hormones that can easily cross cell membranes to enter cells due to their solubility in lipids.