Why were Adam and Chavah ashamed?
Rashi (on Pasuk 11): They were ashamed because they now realized that they were naked. 1 2: Targum Yonasan: They were also ashamed because they had sinned.
Moshav Zekenim (7): They were not naked - they sewed fig leaves to cover themselves! Perhaps only their Ervah was covered. Alternatively, they had removed them in order to have relations.
What is the significance of the change from Ya'akov to Yisrael?