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ASU BIO 181 Exam 2- Questions & Answers
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ASU BIO 181 Exam 2- Questions &Answers
Adhering junctions are based on two different types of cytoskeleton filament systems. Name
those systems. Correct Ans-Actin Filament based, Intermediate filament based
Vitamin K cannot be made by the cells of your body. Where is it made? Correct Ans-Intestinal
Bacteria & Liver
When amino acids are acquired by food because your body can't make them they are called
___________________ ___________________ ___________________. Correct Ans-
Essential Amino Acids
List the layers of the digestive track covered by a thick layer of mucous. Correct Ans-The only
layer of the Digestive Tract that secretes and has mucous is the Mucosa layer
List the order in which storage compounds are utilized if there is no intake of food. Correct
Ans-Glycogen and Fat, then protein
What is bile made from? And how does oatmeal reduce cholesterol levels? Correct Ans-Bile is
made from cholesterol, and some kinds of fiber (like oatmeal) will bind with bile, decreasing its
absorption and lowering cholesterol levels.
How does the pancreas neutralize the pH of the chyme that comes from the
stomach? Correct Ans-Bicarbonate Ion Secretions
Think about feedback loops. What triggers the gall bladder to secrete bile? Correct Ans-Fatty
acids in the lumen of the duodenum
Name the main enzyme in the stomach. Correct Ans-Pepsin
, T/F If something is called a vitamin, it cannot be made by the organism and must be taken in as
a part of diet. Correct Ans-True
90% of absorption in the intestine occurs where? Correct Ans-In the Ileum and Jejunum
The digestive track begins with the ___________________ and the first enzyme added is
___________________. Correct Ans-Mouth, Amylase
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. Correct Ans-
Name the sphincter that separates the stomach from the small intestine. Correct Ans-Pyloric
Sphincter
When glucose is taken in by the digestive track and enters your blood, cells are triggered to take
in the glucose by what mechanism? Correct Ans-Insulin and insulin receptors
Write a few sentences to distinguish between digestion and absorption. Correct Ans-
Digestion is when an enzyme breaks down food into smaller blocks.
Absorption is the assimilation of substances into the bloodstream from the digestive tract.
In what way is the making of a primary lysosome similar to the enzymes delivered by the
pancreas? Correct Ans-Both are made by membrane bound polyribosomes
The esophagus has two distinct muscles that close off the tube. What are these
called? Correct Ans-The upper and lower esophageal sphincters.
Which enzyme unwraps the double helix? Correct Ans-Helicase
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