When Membrane-Bound Receptors Like HER2 Bind to Molecules Outside of the Cell,they

question 25

Multiple Choice

When membrane-bound receptors like HER2 bind to molecules outside of the cell,they must move through the membrane and bind to a second HER2 receptor,forming a dimer,in order for the signal to be sent inside the cell.This is possible because the cell membrane is _____.

• A)A semi-permeable barrier
• B)A fluid mosaic
• C)Rigid like a cell wall
• D)Hydrophobic
• E)A barrier to ions

---

Definitions:

Market Failure

A situation where the allocation of goods and services is not efficient, often leading to a net social welfare loss.

Scarce Resources

Resources that are limited in supply and cannot meet all the demands placed on them, necessitating allocation decisions.

Nonexcludable Good

A good that cannot be withheld from individuals once it has been provided, leading to free-riding issues.

National Defense

The protective measures and military actions that a country undertakes to defend itself against threats and maintain national security.