Human Anatomy and Physiology : Help with Digestive Enzymes and Hormones
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Example Question #152 : Systems Physiology
Which of the following enzymes is produced by the salivary glands?
Lipase
Amylase
Lactase
Pepsin
Amylase
Salivary amylase is produced by the salivary glands and functions to hydrolyze starch to maltose. Pepsin is produced by the stomach to hydrolyze peptide bonds. Lipase is produced by the pancreas to hydrolyze lipids. Lactase is produced in intestinal glands to hydrolyze lactose to glucose and galactose.
Example Question #43 : Digestive Physiology
A resection of the ileum (third portion of the small intestine) would likely result in which of the following conditions?
Type II diabetes
Type I diabetes
Peptic ulcer disease
Iron deficiency
Vitamin B12 deficiency
Vitamin B12 deficiency
Vitamin B12 absorption requires intrinsic factor (IF), which is a protein secreted by the parietal cells of the stomach. When vitamin B12 binds to IF, it is able to be absorbed by the body in the terminal ileum. Therefore, removal of the ileum would likely result in a vitamin B12 deficiency, since the body cannot absorb the B12-IF complex.
Example Question #44 : Digestive Physiology
Which portion of the digestive system has the lowest pH?
Small intestine
Large intestine
Esophagus
Mouth
Stomach
Stomach
The stomach has the lowest pH, roughly around 2.0 A low pH indicates a high acidic content. The stomach is the most acidic environment in the digestive system as it is the home to parietal cells. Parietal cells secrete hydrochloric acid 
Example Question #41 : Digestive Physiology
Pepsinogen is activated by which of the following?
Decrease in 
Decrease in
Increase in 
None of the other answers
Increase in 
Increase in
Pepsinogen is the inactivated form of pepsin. Pepsinogen gets activated by an increase in 
Example Question #42 : Digestive Physiology
Why is pepsin produced in the stomach as an inactive form?
to prevent tissue from being digested
it takes more energy to make the active form
the active form of pepsin can also digest carbohydrate
proteins can only be digested by the inactive form
to prevent tissue from being digested
The tissues in the stomach are also made up of primarily protein. If it was produced in the stomach as its active form, then pepsin could also digest the stomach as well.
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