315 Homework #3 - Homework Assignment#3(due date Mar 3 5pm...

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Homework Assignment #3 (due date Mar 3 rd , 5pm)    Last 6 digit SID: __________  1)  Give the significance of the following terms. Say what they do or why they are important.  (1 pt each)  a) RGD sequence a) RGD sequence  b) Matrix metalloproteinases  2) Compare and contrast the following:  (1 pt. each)  a) Focal contacts vs. hemidesmosomes  b) Tight junctions vs. gap junctions  3)  If a laboratory mouse has a mutation rendering the gene that codes for the L selectin protein non functional, which of the following symptoms would the animal exhibit?  (1 pt)   a) Blistering of the skin  b) Clotting deficiencies     c) Metastasis  By arbitrating the binding of selectin- expressing host cells to ligands on tumor cells, selectins aid metastasis.  d) Inability to fight infection in the tissues 
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