Lab quiz 2-Small intestine, protein digestion, H2O absorption
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| What is the small intestine mostly responsible for? | digestion and absorption
🗑
|
||||
| How long are the duodenum, jejunum, ileum | 10", 8', 12'
🗑
|
||||
| What are the four layers of the wall of the SI | mucosa, submucosa, muscularis externa, serosa
🗑
|
||||
| Where does most digestion take place | the SI
🗑
|
||||
| What is the main source of digestive enzymes | pancreas
🗑
|
||||
| What are the specializations of the mucosa and submucosa | plicae circularis or valves of Kerckrings (3x size increase) villi (10x) microvilli (20x)
🗑
|
||||
| What disease causes serious decrease in surface area | celiac disease-no villi
🗑
|
||||
| What is a lacteal | a central lymphatic duct in each villus for removal of intestinal lymph
🗑
|
||||
| What types of fatts go through the lacteal first | chylomicrons
🗑
|
||||
| What vessles supply the stomach and spleen, intestine and pancreas, intestine | celiac a, sup mesent a, inf mesent a
🗑
|
||||
| What arteries supply the liver | Hepatic & portal
🗑
|
||||
| What vein leaves the liver | hepatic v
🗑
|
||||
| How do lipophilic molecules cross cell membrane | simple diffusion
🗑
|
||||
| How do hydrophilic molecules cross the cell membrane | special transport systems such as channels or carriers
🗑
|
||||
| What is secondary active transport | driven by the Na+ gradient
🗑
|
||||
| What is primary active transport | driven by metabolic energy
🗑
|
||||
| How can some large cells enter the cell | by endocytosis
🗑
|
||||
| What activates pepsinogen | acid
🗑
|
||||
| What activates trypsinogen | intestinal protease enterokinase
🗑
|
||||
| T/F all luminal proteases are endopeptidases | T
🗑
|
||||
| What is the function of pepsin | not very important for protein digestion, acts only on aromatic AAs, inactivated as soon as chyme enters duod
🗑
|
||||
| Where does the final breakdown into absorbable units occur | in the brush border and catalyzed enzymes bound to the brush border membrane = contact digestion
🗑
|
||||
| Where are proteins digested | stomach
🗑
|
||||
| Where are proteases digested | lumen of SI
🗑
|
||||
| Where are polypeptides and AAs digested | brush border of SI
🗑
|
||||
| Where are AAs, dipeptides, tripeptides digested | enterocytes
🗑
|
||||
| Name the 5 zymogens | trypsinogen, chymotrypsinogen, proelastase, procarboxypeptidase A & B-the inactive forms
🗑
|
||||
| Where is absorption of proteins usually completed | mid jejunum, not totally complete until all di/tripeptides are taken up into the cell
🗑
|
||||
| Where do proteins in the colon come from | largely from intestinal bacteria and sloughed off cells that are egested
🗑
|
||||
| What is the daily water intake | 1.5-2 L
🗑
|
||||
| What % of water intake is from solid food | 80%
🗑
|
||||
| Where does most of the H2O absorption take place | SI
🗑
|
||||
| Which tubes in the experiment had the most protein hydrolysis | 1ml .03 % boiled protease & ice cold protease
🗑
|
||||
| What color indicates a positive test for protein digestion | dark blue
🗑
|
||||
| Under what conditions is protease most effective | 37 degrees C and 5-6pH
🗑
|
||||
| What color indicates a neg protein digestion test | light blue
🗑
|
||||
| What is the vitamin required in AA metab | B6
🗑
|
||||
| Where is pepsin inactivated | the pancreas
🗑
|
||||
| What prevents pancreatic proteases from digesting the pancreas | trypsin inhibitor( inhibits trypsinogen)
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
sparklefarkle84
Popular Science sets