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  #1  
Old 07-07-2011
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Vascular Histamine and microcirculatory changes

Histamine is infused into the brachial artery. Which of the following sets of microcirculatory changes would be expected in the infused arm?

Histamine and microcirculatory changes-screen-shot-2011-07-07-9.18.37-pm.png
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A) A
B) B
C) C
D) D
E) E
F) E
G) G
H) H
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  #2  
Old 07-07-2011
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G) G - i think is the correct answer.
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Old 07-07-2011
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I vote for G
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Old 07-07-2011
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g...................
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Old 07-07-2011
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I think G.
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Old 07-07-2011
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Quote:
Originally Posted by bebix View Post
Histamine is infused into the brachial artery. Which of the following sets of microcirculatory changes would be expected in the infused arm?

Attachment 1721
click image to enlarge

A) A
B) B
C) C
D) D
E) E
F) E
G) G
H) H

G..i think.
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  #7  
Old 07-07-2011
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its G, histamine a potent vasodilator leading to reduced arteriolar resistance that cause increase in hydrostatic pressure which according to starling's forces will lead to increased filtration !
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Old 07-07-2011
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i m also for G)
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Old 07-08-2011
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Quote:
Originally Posted by bebix View Post
Histamine is infused into the brachial artery. Which of the following sets of microcirculatory changes would be expected in the infused arm?

Attachment 1721
click image to enlarge

A) A
B) B
C) C
D) D
E) E
F) E
G) G
H) H
the ans is G
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  #10  
Old 07-08-2011
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The Ans is -> G
__________________
Learning is like to row your boat upstream, if you stop learning, you will be pushed back by the current.
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  #11  
Old 07-08-2011
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Correct Answer correct answer

The correct answer is G)

Histamine is a vasodilator that is typically released by mast cells and basophils. Infusion into a brachial artery would decrease arteriolar resistance and increase blood flow. The decrease in arteriolar resistance would also increase capillary hydrostatic pressure and capillary filtration rate.
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  #12  
Old 07-17-2011
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Quote:
Originally Posted by bebix View Post
Histamine is infused into the brachial artery. Which of the following sets of microcirculatory changes would be expected in the infused arm?

Attachment 1721
click image to enlarge

A) A
B) B
C) C
D) D
E) E
F) E
G) G
H) H

Dear Bebix
It is obvious that the only dude would be if after decreasing the vessels (vasodilation)...you will get an increase or decrease of the filtration rate.
The flow increases but the velocity decreases... This are capillaries...not simple vessels.
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Cardiovascular-, Pharmacology-, Physiology-, Step-1-Questions

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