Which of the Following Are Common Means by Which Binding

question 373

Multiple Choice

Which of the following are common means by which binding of an extracellular chemical messenger with a cell's receptor brings about a desired intracellular response?

• A)opening or closing of specific channels to regulate ionic movement across the plasma membrane
• B)activation of an extracellular second messenger system
• C) alteration of DNA structure by attaching to the nucleus
• D) combination with surface receptor

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Definitions:

Stalagmites

Mineral formations that rise from the floor of a cave due to the accumulation of material deposited by dripping water from the ceiling.

Karst Topography

A landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum, characterized by underground drainage systems with sinkholes, caves, and disappearing streams.

Steep Pillars

Tall, vertical rock formations resulting from the erosion of surrounding softer material, often seen in high-gradient areas.

Tropical

Relating to or characteristic of the tropics, typically hot and humid climate zones between the Tropic of Cancer and the Tropic of Capricorn.