Problem: The A cells produce glucagon , which mobilizes the hepatic glycogen , and the enterochromaffin cells produce serotonin , which stimulates the contraction of the smooth muscles .
The A cells produce Glucagon , which mobilises hepatic glycogen , and the enterochromaffin cells produce serotonin , which stimulates the contraction of smooth muscles .
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A: yes

Problem: from the second relative homotopy group to the fundamental group , may be given the structure of crossed module . The functor
The structure of the crossed module can be given from the second relative homotopy group to the fundamental group .
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A: yes

Problem: The long tunnel runs from a warehouse near the San Diego airport to a warehouse in Tijuana .
The long tunnel runs from a warehouse near Tijuana airport to a warehouse in San Diego .
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A:
no