Answer:
It is D
Step-by-step explanation:
It moistens food and aids swallowing. It also contains enzymes that help with digestion. Saliva can help to heal wounds and remove germs from the mouth, as well as prevent dryness and act as a barrier against irritants and toxins.
When activated, the receptor most likely prompting the production of saliva is the taste receptor. When food enters the mouth, the salivary glands produce the saliva upon the sensation of taste.
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