A disease that resulted in defective Na+/K+ pumps would have no effect on the absorption of water across an epithelial surface.
Answer the following statement true (T) or false (F)
False
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What second messenger most directly causes calcium ions to be released from intracellular stores?
A. Phospholipase A B. Phospholipase C C. Diacylglycerol D. Adenylyl cyclase E. inositol trisphosphate
The numerous ________ within the intercalated discs prevent cardiac muscle fibers from pulling apart.
Fill in the blank(s) with the appropriate word(s).
Interphase occurs
A. prior to meiosis. B. between meiosis I and meiosis II. C. between anaphase I and telophase I. D. between prophase I and prophase II. E. between telophase II and cytokinesis.
Which of the following operates voluntarily and is controlled by the cerebral cortex?
A) ileocecal valve B) pyloric sphincter C) internal anal sphincter D) external anal sphincter