Digestive system help!

Don't know about the first two, but lactose is broken down into monosaccharides by intestinal brush border enzyme lactase. Good luck on your test!! I have one in a week on digestive, metabolism and urinary.

I need help with these 3 questions:

Jaundice is a yellow staining of tissues produced by high blood concentrations of bilirubin. Which of the following is a likely cause of jaundice in adults?

1. Decreased production of HCl in the stomach resulting in a more neutral stomach environment

2. Gallstones that result in blockage of bile excretion.

3. . Lactase deficiency resulting in lactose intolerance.

4. Decreased secretion of amylase by the pancreas.

* Individuals with gastritis are told to avoid foods that stimulate acid secretion and to take antacids. They may also take H2 histamine receptor blockers such as Zantac. Which of the following explains how the fuction of histamine?

1. Histamine reduces the activity of the proton pump (H+/K+)

2. Histamine converts pepsinogen to pepsin.

3. Histamine promotes the release of HCl by parietal cells.

4. Histamine promotes the release of gastrin, which stimulates parietal cells to secrete HCL.

Bile duct obstruction:

http://www.nlm.nih.gov/medlineplus/ency/article/000263.htm

This site explains the effect of histamine on parietal cells in the stomach:

http://www.vivo.colostate.edu/hbooks/pathphys/digestion/stomach/parietal.html

The first answer would be the gallstones

and the last would be the brush border enzymes in the small intestine.

I'm not sure about the second.

I just went through the digestive system and spent lots of hours studying for it..

Good Luck!

Oh and after reading the above post, the poster is correct.

Parietal cells secret HCl in the stomach so I'm also assuming that the medication would block the secretion of HCl

Thank you both for the help

Don't know about the first two, but lactose is broken down into monosaccharides by intestinal brush border enzyme lactase. Good luck on your test!! I have one in a week on digestive, metabolism and urinary.

I have my exam in one week too on muscle, cardiovascular, immune, respiratory, digestive, urinary and reproductive!!!

Total of 8 chapters because cardiovascular has 2 chapters

Thank you for the help :) and Good luck to you!