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.
1. Pepsin. Pepsin is âan inactive form of pepsinogen that is produced in the stomachâ. It activates only during the digestion process and breaks down the proteins in the food into components like peptones, proteoses and polypeptides.nlike pepsin, pepsinogen can be converted to pepsin by hydrochloric acid (HCL). Pepsinogenâs secretion is stimulated by histamine, vagal stimulation and gastrin, whereas the same is not the case with pepsin. Moreover, pepsinogen is constant in both alkaline and natural solutions, while pepsin is not.