THORAX ABDOMEN AND PELVIS

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MEDICAL

RECTUM AND ANUS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Enzymes (chemicals) in your saliva help break down food while chewing. This is ____
A
Mechanical digestion
B
Chemical digestion
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Chemical digestion in the mouth is minor but consists of salivary amylase (ptyalin, or alpha-amylase) and lingual lipase, both contained in the saliva. Salivary amylase is chemically identical to pancreatic amylase and digests starch into maltose and maltotriose, working at a pH optimum of 6.7 to 7.0.

Detailed explanation-2: -In your stomach, unique chief cells secrete digestive enzymes. One is pepsin, which breaks down proteins. Another is gastric lipase, which breaks down triglycerides.

Detailed explanation-3: -Physical digestion is the mechanical breakdown of food. Physical digestion in the mouth includes chewing, which masticates, or grinds, food. Chemical digestion in the mouth is done by salivary amylase which is the enzyme in the saliva that breaks down complex carbohydrates into simple sugar.

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