Something that causes a response in a body part or organism. A stimulus may be internal or external. Sense organs, such as the ear, and sensory receptors, such as those in the skin, are sensitive to external stimuli such as sound and touch.
Just curious...given my insurance plan I can get a new pair of frames and lenses once every 2 years, but I realllly love glasses so I tend to purchase about 2 pair per year...Gotta have my style...oh and of course the added benefit of sight is a nice plus:)
However many women don't know at what to get a mammogram or how often to get one. According ot the National Cancer Institute, women in their 40s and older should have mammograms every 1 to 2 years. Women with an elevated risk of breast cancer need to talk to thier doctor about how often and when to get a mammogram.