Cell Signaling Problem Set
Living organisms constantly receive and interpret signals from their
environment. Signals can come in the form of light, heat, water, odors,
touch, or sound. Cells of multi-cellular organisms also receive signals
from other cells, including signals for cell division and differentiation.
The majority of cells in our bodies must constantly receive signals that
keep them alive and functioning. All organisms also have signaling systems
that warn of the presence of pathogens, leading to a protective response.
The key concept is that the many signaling systems of biology have very similar or related steps. The same signaling system can lead to very different responses in different cells or different organisms. Studies of the mechanisms of cell signaling are leading to new understanding of many diseases, and to new strategies for therapy.
The Biology Project
Department of Biochemistry and Molecular Biophysics
University of Arizona
Revised: August 2004
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