Digestive system

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Bile from the liver and digestive juices from the pancreas enter which section of the small intestine?

duodenum

Amylase chemically breaks down its substrate into what products?

maltose

Benedict's reagent detects the presence of what?

maltose

Digestion begins in the...

mouth

Where does starch digestion begin?

mouth

submandibular gland

produces 60-70% of saliva

Place the following parts of the small intestines in order from proximal to distal.

1. Duodenum 2. Jejunum 3. Ileum

Place the following organs of the digestive tract in order from proximal to distal.

1. oral cavity 2. esophagus 3. stomach 4. small intestine 5. large intestine 6. rectum

Pepsin is most effective at a pH of

2.0

What is the optimal pH for amylase?

6.8

paratoid gland

Produces 25-30% of saliva

sublingual gland

Produces 3-5% of saliva

Salivary amylase digests

carbohydrates

Accessories to GI tract:

liver, gallbladder, pancreas, salivary glands, teeth

During digestion, the major site of nutrient absorption is the...

small intestine

Amylase in an enzyme specific to what substrate?

starch

Which of the following is the substrate for carbohydrate digestion?

starch

Part of GI tract:

stomach, small intestine, large intestine, esophagus, rectum


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