Binding of a protein hormone may lead to formation of a(n) __________, which relays a signal into the cell. Fill in the blank(s) with the appropriate word(s)
ANSWER: second messenger
You might also like to view...
The Saguaro cactus is a large cactus found in some southwestern desert environments. It plays
a central role in providing habitat for a variety of other species, and if these cacti die or are removed from the ecosystem, biodiversity declines. Thus, the Saguaro cactus is a __________.
a. keystone species b. tertiary consumer c. generalist d. trophic level
What is the endomembrane system?
A. A group of internal membranes and organelles that are highly connected within a eukaryotic cell B. Another name for the Golgi apparatus C. Another name for the endoplasmic reticulum D. A group of vesicles that are highly connected within a eukaryotic cells
If you were cast upon a desert island with no fresh water to drink, which of the following would
increase in your bloodstream in an effort to conserve water? a. erythropoietin b. oxytocin c. insulin d. antidiuretic hormone e. glucose
Ackermann et al. (2003) investigated senescence in bacteria. What do the following results demonstrate and why are they surprising given evolutionary theory on aging?
a. Bacteria do not senesce. Every organism should show trade-offs between fitness and longevity. b. Bacteria do not senesce. Extrinsic mortality is not constant throughout the life of a bacterial cell. c. Bacteria do senesce. Pleiotropy is the rare exception in simple bacterial genomes. d. Bacteria do senesce. Cell propagation and reproduction are the same in bacteria.