Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
wrote...
11 years ago
Here's for activity 1! hope it helps!! Slight Smile

 Attached file 
(41.17 KB)
You must login or register to gain access to this attachment.
bio_man,  smhall6836,  eneida8a,  thedingo2343
wrote...
11 years ago
uld you happen to have the answers for physio 9 exercise 8 activity 1 activity questions?

2.  what is the purpose for including tube 3 and what can you conclude from the result?

3.  describe how you determined the optimal ph for amylase activity?

4.  judging from what you learned inthis activity suggest a reason why salivary amylase wold be much less active in the stomach?
wrote...
Educator
11 years ago
uld you happen to have the answers for physio 9 exercise 8 activity 1 activity questions?

2.  what is the purpose for including tube 3 and what can you conclude from the result?

3.  describe how you determined the optimal ph for amylase activity?

4.  judging from what you learned inthis activity suggest a reason why salivary amylase wold be much less active in the stomach?

Please start a new topic... will answer #2 for now.

The purpose of including Tube #3 is to observe the activity of the enzyme at neutral pH. The enzyme is very active at this pH.
wrote...
11 years ago
This was alot of help, re-assured all my answers...thanks Slight Smile
wrote...
11 years ago
Huge help, thanks!
wrote...
11 years ago
1. Explain why you can't fully test the lipase activity in tube 5.
Your answer:
because lipase is enzyme that has optimum pH at 9.0 which is alkali, but in tube 5 the pH is acidic at pH 2.0. As enzymes
are highly sensitive and specific for lipase is react at pH 9.0. the condition of pH 2.0 buffer inhibits its enzymatic reaction.
2. Which tube had the highest lipase activity? How well did the results compare with your prediction? Discuss possible
reasons why it may or may not have matched.
Your answer:
tube 6 have the highest lipase activity. tube 6 has solution that contains lipase, vegetable oil , bile salt and pH 9.0 buffer. to
breakdown lipid in this experiment is the vegetable oil, it must first coated with bile salt to break the fat globules into small
droplets so that they can enter the membrane. next the bile salts are negatively charged, making the droplets repels each
other (seperated with each other) and form an emulsion. emulsion droplet, which are seperated, give fat digesting enzyme
lipase a greater surface area to act on. so the digestion of lipid is completed as the end product is acidic which is fatty acis
the pH decrease from pH 9.00 to pH 8.97.
3. Explain why pancreatic lipase would be active in both the mouth and the pancreas.
Your answer:
pancreatic lipase is produced in the pancreas and is secreted into the intestines. Our mouths have salivary lipase, which is a
form of lipase formed in the salivary glands and secreted into the mouth.The salivary glands produce an enzyme called
lingual lipase which helps to break down fat. However, this enzyme operates best at pH 4.5 - 5.4 so it is not very active until
it reaches the stomach.
4. Describe the process of bile emulsification of lipids and how it improves lipase activity.
Your answer:
-for fat digestion, a process called emulsification happens in the small intestine. this process functions in accelerating fat
digestion.
-fats are triglyceride (not water-soluble ) . In the chyme , they will clump to form fat globules.
-As the fat globules move in the intestinal wall, the movement of the muscle layers breaks apart the fat globules into small
droplets that coated with bile salts.
-bile salts are negatively charged, making the droplets repels each other (seperated with each other) and form an emulsion
- emulsion droplet, which are seperated, give fat digesting enzyme lipase a greater surface area to act on
-by the time peristalsis has moved the chyme mixture through the duodenum, chemical digestion of our meal is just about to
complete.
wrote...
10 years ago
My physio q's and answers are not in the same order as previous stated answers. I have the first questions on activity 3 as describe the effect that boiling effect hod on pepsin and how u could tell that it have that effect. answer previously stated dont match up.
wrote...
10 years ago
Thank you! This was so helpful.  Slight Smile
  New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  896 People Browsing
 114 Signed Up Today
Related Images
  
 921
  
 215
  
 324
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 308