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ASU BIO 181 EXAM 2 QUESTIONS AND ANSWERS 2024
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ASU BIO 181 EXAM 2 QUESTIONS AND ANSWERS 2024
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ASU BIO 181 EXAM 2Write a few sentences to distinguish between digestion and absorption. -
ANSWERS-Digestion is breaking down food into smaller chunks. With absorption,
you are taking the nutrients into your body.
When glucose is taken in by the digestive track and enters your blood, cells are
triggered to take in the glucose by what mechanism? - ANSWERS-insulin response
Draw concentric circles and label the four layers of the gut. Also label the hole at
the inner most circle. List what is in these four layers. - ANSWERS-
What is bile made from? And how does oatmeal reduce cholesterol levels? -
ANSWERS-Bile is synthesized from cholesterol. Oatmeal is a fiber that binds to the
bile, which decreases its absorption by the ileum. As a result, cholesterol levels
are reduced because additional bile does not need to be created.
Think about feedback loops. What triggers the gall bladder to secrete bile? -
ANSWERS-when fat is present, it sends a signal to the hepatic duct, which triggers
the gallbladder to secrete bile by constricting the gallbladder to push the bile into
the bile duct and into the duodenum.
, In what way is the making of a primary lysosome similar to the enzymes delivered
by the pancreas? - ANSWERS-Pancreatic enzymes originate in the rough
Endoplasmic Reticulum, are then passed through the Golgi Apparatus, and placed
in vesicles for further transport.
Lysosomes originate in the Golgi Apparatus and are placed in vesicles for further
transport.
The digestive track begins with the ___________________ and the first enzyme
added is ___________________. - ANSWERS-mouth; amalyse
90% of absorption in the intestine occurs where? - ANSWERS-The jejunum and
the ileum
Name the sphincter that separates the stomach from the small intestine. -
ANSWERS-pyloric sphincter
If something is called a vitamin, it cannot be made by the organism and must be
taken in as a part of diet. - ANSWERS-True
How does the pancreas neutralize the pH of the chyme that comes from the
stomach? - ANSWERS-Bicarbonate ions
When amino acids are acquired by food because your body can't make them they
are called ___________________ ___________________ ___________________.
- ANSWERS-Essential Amino Acids
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