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Endocrinology
metabolism
22
Physiology
Graduate
12/13/2007

Additional Physiology Flashcards

 


 

Cards

Term
What is #1 priority for endocrine system?
Definition
maintain plasma glucose at 100 mg%
Term
What is mg %
Definition
milligrams of whatever per 100 milliliters of blood
Term
What is polyuria?
Definition
kidney glucose> or = 250 mg%
Term
What is polydipsia
Definition
excess drinking
Term

what is pollyphagia?

Definition
Excess eating
Term
What do these things have in common?
Definition
all symptoms of elevated blood glucose levels caused by osmotic problems, cell dehydration and hyperosmolarity
Term

what happens when glucose levels are low for an extended period of time?

Definition
death of neural, red blood, renal medulla cells
Term
what is the difference between anabolic and catabolic
Definition

anabolic=builds tissue up

Catabolic=uses it up or tears it down

Term
the ratio of insulin and glucogon does what?
Definition
regulates metabolic processes
Term
What is glycogen?
Definition
It is the polysacheride of glucose. it functions as short term storage for glucose
Term
What is glycogenolysis and which hormones stimulate ut?
Definition

Glycogenolysis is the catabolism of glycogen by removal of a glucose monomer through cleavage with inorganic phosphate to produce glucose-1-phosphate. This derivative of glucose is then converted to glucose-6-phosphate, an intermediate in glycolysis.

The hormones glucagon and epinephrine stimulate glycogenolysis.

 

from wikipedia

Term
lypolisys
Definition
http://en.wikipedia.org/wiki/Lipolysis
Term
what is gluconeogenesis?
Definition

Gluconeogenesis is the generation of glucose from non-sugar carbon substrates like pyruvate, lactate, glycerol, and glucogenic amino acids.

 

http://en.wikipedia.org/wiki/Gluconeogenesis

Term
What is the liver's role in metabolism?
Definition

1) stores 1/3 of the body's glycogen

20 Primary site of gluconeogenesis

3) Primary site of FFA syntheis

Term
What is Adipose tissue's main contributions to metabolism?
Definition

Primary site of lipid/trigliceride storage

15% body weight

Lypolisys

Term
what is the composition of triglycerides in circulation?
Definition

free fatty acids and glycerol are bound to albumin which is taken up by cells as a nutrient.

Term

What does LPL stand for and what does it do?

Definition
Lipoprotien lipase, it's an enzyme that cleaves off FFA's from TG and vLDLs
Term
what is a chylomicron?
Definition

Chylomicrons are large lipoprotein particles (having a diameter of 75 to 1,200nm) that are created by the absorptive cells of the small intestine.The chylomicrons are released by exocytosis from enterocytes into lacteals, lymphatic vessels originating in the villi of the small intestine, and are then secreted into the bloodstream at the thoracic duct's connection with the left subclavian vein. Chylomicrons transport exogenous lipids to liver, adipose, cardiac and skeletal muscle tissue where they are broken down by lipoprotein lipase into very low density lipoproteins (VLDLs).

 

http://en.wikipedia.org/wiki/Chylomicron

Term
What is Muscle's role in energy use?
Definition

stores 2/3 of glycogen

50% of body mass

very variable with use

oxydizes FFA ( for atp generation)

uses 50% neutral amino acids to produce ATP

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