1.   And that may make nasal membranes more sensitive to allergens, allergy-causing irritants that trigger hay fever and asthma.

2.   Meanwhile, the women were given a nasal spray to use for two weeks before the test to protect their nasal membranes from infection.

3.   Pine pollen is too big to go through nasal membranes, and dogwood pollen is spread by bees, not the wind.

4.   McNeil said in a statement the new product delivers nicotine to the nasal membranes, providing fast relief of nicotine craving.