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Kaplan Qbank USMLE



Author8 Posts
  #1

Tissue versus lacking enzyme:
1-adipose tissue
2-muscle
3-Liver
4-Kidney

A-GLYCEROL KINASE
B-THIOTRANSFERASE
C-HEXOKINASE
D-GLUCOSE-6-PHOSPHATASE

  #2

1.A
2.D
3.B
4. :?:

  #3

correct

  #4

please reply colombia.. :roll:

  #5

whats the answer??

  #6

Liver is the organ to release sugar between meals...so kidney should not have glucose-6-phosphatase. Do you agree?

  #7

Actually it seems that kidney does have some gluconeogenic activity, according to Kaplan (was in the explination of a Q). Liver and Kidney are the only two gluconeogenic organs.
Glucose-6-Phosphatase: absent in adipose tissue and liver
Glycerol Kinase: shouldn't it be present only in the liver?
thiotransferase: absent only in liver
Hexokinase: present in all 4 tissues

  #8

glykerol kinase lacks in adipose tissue / is present in liver

glucose 6 phosphatase is used in glycogenolysis & gluconeogenesis. tissues that have the ability for gluconeogenesis are liver & kidney & small amounts at intestinal epithelium

liver lacks hexokinase b/c hexokinase has a high affinity for glucose. if liver had hexokinase then it would take all the glucose from the portal blood and leave nothing to circulation

thiotransferase lacks in also liver.(this absence accounts for its inability to use ketones as fuel

a little confusing home-made question with more than one answers for each tissue....

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