Salivary amylase is an enzyme in the human body that digests carbohydrates from food. when food mixed with saliva enters the stomach, the action of salivary amylase slows dramatically. which most likely causes salivary amylase enzyme to stop digesting food?

   Acid in the stomach

Explanation: Food digestion begins in the mouth where food is digested, except by chewing, also by the salivary amylase enzyme. The fact that there is a high concentration of acid in the stomach, that is, acidic environment, stops the digestion of food by the salivary enzyme amylase. The usual stomach acidity is between 1 and 2 pH, which is quite acidic. Such acidity causes a change in the structure of the salivary enzyme amylase, which, when it enters the stomach, ceases to have a function for digestion.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

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