Although you consume millions of bacteria every day when ingesting food and drink, you rarely get sick. this is partially due to which of the following defenses of the digestive system?

antibacterial enzymes; stomach acid
histamines; antibacterial enzymes
stomach acid; cytokines
cytokines; histamines

Option A, Antibacterial enzymes; stomach acid

Explanation:

Bacteria’s which are taken into the stomach through various food item such as yoghurt, curd, and all other fermented food is acted upon by Antibacterial enzymes and stomach acid .  

Most of the bacteria’s that are taken into the stomach everyday are killed by the stomach acid as it is a strong acid with a pH less than 2.0

Thus, Option A, is the correct choice of answer

answer: glucoamylase presented optimum activity at temperature of 55â°c, and, in the glycosidic bonds from the non-reducing ends of starch, resulting in the production of glucose. source and type of fermentation can affect the enzyme's properties

credit to kalahira