If the tight junctions in the intestine were disrupted
A. small molecules would not be exchanged between neighboring intestinal cells.
B. bacteria could move from the intestines to the bloodstream causing an infection.
C. intestinal cells could not attach to integral membrane proteins.
D. small molecules would not be able to move into cells lining the intestine.
E. intestinal cells could not attach to the extracellular matrix.
Answer: B
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In the human body, bicarbonate and carbonate ions work together to stabilize or buffer the pH of body fluids. What would happen to blood if these buffering agents were removed?
What will be an ideal response?
Glucose is the most commonly used energy source by human cells because
A) this is the largest macromolecule available to cells for energy production. B) this monosaccharide yields the most energy of all macromolecules. C) fats and proteins yield too much energy for the cells to process. D) glucose is generally the most readily available substrate, derived from food or glycogen. E) no other macromolecule can be broken down enzymatically by cells to release energy.
Raw milk is a source of what kind of outbreaks?
A) Salmonella and Escherichia coli B) Staphylococcus aureus and Streptococcus pyogenes C) Pseudomonas aeruginosa and Enteroccus faecalis