{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Digestion - direct secretion amplification nothing...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Duodenum- a. Acids in the stomach stimulate the release of bicarbonate b. Secretin- actual hormone that will cause the pancrease to release bicarbonate c. Pyloric sphincter- hormones can keep closed to further digest d. Meal high in saturated fats i. The stomach will hold up a little longer and try to soften before release into the duodenum (CCK) 1. Gull bladder, pancreas 2. Bile-emulsify 2. Chemical digestion of proteins a. HCl causes protein to unfold b. Enzyme, ph 2, c. Lumen- chemical digestion takes place d. Parietal- cell secretes e. Pepsinogen f. *pepsin can also activate pepsinogen i. Acid in stomach in lumen that activates pepsinogen which goes onto de- naturation ii. Every 3 days lining is rebuilt by mitosis, provided all other things are equal iii. Neutralize HCl g. Slow digestion down i. Slow down stomach peristalsis ii. Secretion of pepsinogen in the stomach would be an example of positive feedback
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: direct secretion, amplification, nothing inhibiting the process (“pump it up, turn it out, shut it down”) h. Caediac valve-reverse peristalsis i. Acid reflux is a temporary spasm. i. Large intestine-i. Symbiotic relationship ii. Vitamin k 1. Sharks carnivorous- don’t need length of intestine like humans. Must first initially completely digest meal. 2. Fiber diet- have longer intestines j. Appendix- k. Incredible amount of water used in digestion i. Ex: HCl is only useful after hydrolyzed 1. Most of the water is recycled in large intestine 2. Colon- last region of LI, ii. All material moves to liver 1. Some materials can readily move across the stomach lining and not go through the liver a. Ex: alcohol only if has gone through the small intestine b. Hypatic cortal vein i. Liver reduces concentration of sugar and puts back in at about 0.1%...
View Full Document

{[ snackBarMessage ]}