DHN 311 Exam Tested Questions Reviewed And Revised With Correct Answers Already Passed!!
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Course
DHN 311
Institution
DHN 311
DHN 311 Exam Tested Questions
Reviewed And Revised
With Correct Answers
Already Passed!!
1. Glucagon is released from __1__ cells in the __2__ in response to __3__ blood
glucose. Also increases __4__ that favor __5__ - ANSWER
1. alpha
2. pancreas
3. low
4. subtrate levels
...
DHN 311 Exam Tested Questions
Reviewed And Revised
With Correct Answers
Already Passed!!
1. Glucagon is released from __1__ cells in the __2__ in response to __3__ blood
glucose. Also increases __4__ that favor __5__ - ANSWER 1. alpha
2. pancreas
3. low
4. subtrate levels
5. gluconeogenesis
2. 3 mechanisms used by GLUCAGON to regulate gluconeohenesis - ANSWER
1. changes in allosteric effectors (increase substrates that favor gluconeogenesis)
2. covalent modification (glucagon binding increases cAMP to phosph. enzymes as
to increase gluconeogenesis)
3. Induction of enzyme synthesis (glucagon increases transcription of PEPCK which
catalyzes first step in gluconeo.)
3. In what part of the cell does the PPP take place and in which tissues? -
ANSWER in the cytosol of the cell of muscle and liver tissue
, 4. Pentose Phosphate Pathway (PPP) has two phases the __1__ phase which is
irreversible, and the __2__ phase which is reversible - ANSWER 1. oxidative
2. non-oxidative
5. What are the products of the:
1. oxidative PPP
2. non-oxidative PPP - ANSWER 1. ribulose 5-P, CO2, 2 NADPH
2. ribose 5-P or intermediates of glycolysis
6. The NADPH provided by ox-PPP is used by tissues that carry out extensive
__1__ synthesis or active synthesis of __2__ and __3__ hormones. - ANSWER
1. fatty acid (liver, adipose, mammary)
2. cholesterol
3. steroid
7. NADPH is used in __1__ biosynthetic reactions, whereas NADP favors __2__.
Both can also be used to prevent __3__ (lens and cornea) - ANSWER 1.
reduction
2. oxidative
3. oxidative damage
8. Blood glucose is obtained from what 3 sources? - ANSWER 1. diet
2. degradation of glycogen
3. gluconeogenesis
* blood glucose is required for human life
, 9. Muscle cells lack the enzyme __1__, thus, muscle glycogen cannot supply
glucose to the circulation and other tissues. - ANSWER 1. glucose-6-
phosphatase
10. Liver cells break down glycogen and are able to __1__ glucose-6-P to glucose
to be sent into __2__ and to other tissues - ANSWER 1. dephosphorylate
2. circulation
11. Name 3 enzymes involved in glycogen breakdown. - ANSWER glycogen
phosphorylase, glycogen de-branching enzyme, and phosphoglucomutase
12. In the liver, glycogen degradation is __1__ in the fasted state. In skeletal
muscle this occurs during __2__, and glycogen synthesis begins when muscle is
__3__ - ANSWER 1. increased
2. active exercise
3. at rest
13. Glucose is released from the liver into the __1__ until the __2__ pathway is
actively producing glucose - ANSWER 1. blood stream
2. gluconeogenic
14. In muscle, the glucose-6-P generated from glycogenolysis enters the __1__
pathway of the muscle to generate __2__ for muscle contraction - ANSWER
1. glycolysis
2. ATP
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