As long as you know the amplitude tolerance (+/- 3dB), the frequency response range or width tells you how high or low the speaker goes. A speaker rated as 20Hz â 25kHz +/- 3dB will play lower bass and higher treble sounds than a speaker that measures 40Hz â 20kHz +/- 3dB.requency Response In Context. A big improvement would be a frequency response number that also includes the amplitude tolerance, expressed as âXHz-YkHz +/- 3dB.â This tells you that the amplitude of the speakerâs response relative to frequency does not deviate more than 3 Decibels from the center line.
1 Pepsin is the main gastric enzyme. 2  It is produced by the stomach cells called chief cells in its inactive form pepsinogen, which is a zymogen. 3  Pepsinogen is then activated by the stomach acid into its active form, pepsin.here are four types of cells in the stomach: 1  Parietal cells: Produce hydrochloric acid and intrinsic factor. 2  Gastric chief cells: Produce pepsinogen. 3  Chief cells are mainly found in the body of stomach, which is the middle or superior anatomic portion of the stomach.
One of the important products of gastric juice that is secreted by these cells is pepsin. Pepsin is the chief digestive enzyme in the stomach that breaks down proteins. You can think of pepsin as the 'chief' digestive enzyme in the stomach because it is produced by the chief cells.This can help you remember the term, but I should clarify that pepsin is the active protein-digesting enzyme.The chief cells actually produce pepsinogen (an inactive form of pepsin).ucus that is produced by the epithelial cells of the stomach help protect the lining of the stomach from the corrosive hydrochloric acid and pepsin. If this protective lining fails, it can result in a peptic ulcer, which is a lesion of the mucosa.