There are a few other Beatles tunes where Lennon's choice of harmonica might not be obvious. The signature riff of Please Please Me is almost as distinctive as the intro to Love Me Do.
The bile that is secreted by the liver and stored in the gallbladder is not the same as the bile that is secreted by the gallbladder. During gallbladder storage of bile, it is concentrated by removal of some water and electrolytes.
After you eat, the gallbladder normally releases a flood of bile into your intestine where it helps break down fat. Without a gallbladder, your liver still produces bile. But instead of releasing it after a meal, bile continuously drips into the intestine.