The Conditions in Hundreds of Colonias on the Texas Side

question 74

Multiple Choice

The conditions in hundreds of colonias on the Texas side of the border have contributed to ________ due to poor sewage systems and lack of quality water.

• A) them having highest death rates in Texas
• B) severe health problems including hepatitis
• C) them having the highest death rates in the country
• D) them receiving the most funding in the state for infrastructure development
• E) several plagues and epidemics that have broken out in South Texas

---

Definitions:

Second Messenger

is a molecule inside cells that acts to transmit signals from a receptor to a target within the cell, such as cAMP or calcium ions.

Growth Factor

A naturally occurring substance capable of stimulating cellular growth, proliferation, healing, and cellular differentiation.

Tyrosine Kinase Receptor

A plasma membrane receptor that phosphorylates the tyrosine part of proteins; when a ligand binds to the receptor, the conformation of the receptor changes and it may phosphorylate itself as well as other molecules; important in immune function and serves as a receptor for insulin.

Ras Proteins

A family of proteins involved in transmitting signals within cells, playing a role in cell growth and development.