Pemphigus vulgaris is an autoimmune disorder in humans in which antibodies are produced against the cadherins of desmosomes. The blistering of the skin and mucous membranes characteristic of this disorder is probably a result of _____
A) a decrease in flexibility of the cell membrane
B) an inadequate number of G-protein receptors
C) inadequate production of cytoskeletal proteins
D) a loss in cell-cell adhesion
Answer: D
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The best conclusion concerning delta is that the cells _____
A) contain no DNA. B) contain no RNA. C) contain only one chromosome that is very short. D) are in the G0 phase. E) divide in the G1 phase.
This type of tissue is rich in extracellular matrix and includes tendon and cartilage.
A. muscle B. connective C. epithelial D. nervous E. hepatic
The variable(s) in the butterfly experiment
is(are) the
a. butterfly wings pattern color. b. butterfly species. c. butterfly wings pattern color and sounds emitted. d. rainforest region used. e. percentage of survivors
Nearly everyone appears to be infected with polyomaviruses BK and JC by the age of 15
Indicate whether the statement is true or false