Scrapie is an example of a ________ disease found in sheep and caused by a prion.
a) neurological
b) gastrointestinal
c) respiratory
d) cardiovascular
Ans: a) neurological
Biology & Microbiology
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Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) excessive cell division
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Neurons can synapse with many different types of cells (including muscle cells, secretory cells, and other neurons)
A. true B. false
Biology & Microbiology
In the human mouth, ____ begins the process of chemical digestion
a. amylase b. pepsin c. bile d. secretin e. chime
Biology & Microbiology
Outline the three levels of defense of humans against the invasion of pathogens
What will be an ideal response?
Biology & Microbiology