The Large Intestine

The Large Intestine:

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/index.html

What are the three main functions of the large intestine:

1. _______________________________________

2. _______________________________________

3. _______________________________________

What three constituents make up feces?

1. _______________

2. _______________

3. _______________

Gross and microscoping study of the colon:

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/anatomy.html

Name the three major parts of the large intestine:

1. ______________________

2. ______________________

3. ______________________

Why are goblet cells so numerous in the large intestine?

Absorption, secretion and formation of feces:

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/absorb.html

How do we know that the bells that tourists wear in the parks that have bears have failed to keep the bears away? J

What three “items” absorbed by the LI.?

1. ____

2. ____

3. ____

What two “items” are secreted by the LI?

1. _________

2. _________

Why does the LI absorb water more efficiently than the SI?

Why is it important that when Na+ is absorbed by the LI, bicarbonate ion is released into the LI?

What is the function of mucus in the LI?

What are the major components of feces?

What gives feces its color?

What three gases give feces its “unique” odor?

Large Intestine Motility:

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/motility.html

Generally, what keeps material moving through the LI?

What stimulates the “defecation” reflex?

How can humans learn to overcome the nervous stimulation associated with defecation?

Microbial fermentation:

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/ferment.html

Does the LI of a human produce any digestive enzymes?

Name two benefits that intestinal bacteria provide for humans:

1. _________________________________

2. _________________________________

What are the end products of cellulose digestion by bacteria in the LI?

1. _________________

2. _________________

3. _________________

4. _________________

Intestinal gas Production: J

http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/largegut/flatus.html

What is name given to the gas emitted from the LI?

What are the 5 main gases emitted?

1. ___________

2. ___________

3. ___________

4. ___________

5. ___________

Do any of these gases named above have odor?

What three gases contribute to the odor?

1. __________

2. __________

3. __________

What are the sources of intestinal gas?

1. ____________________

2. ____________________

3. ____________________

Intestinal gases are a frequent cause of minor, occasionally major, social embarrassment, but can they ever be of truly dangerous? If so how.