+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
What are the 2 means by which venous return is increased during exercise?
|
1) squeezing of veins by skeletal muscle
2) sympathetic nervous system produces venoconstriction
|
|
Alpha 1 vasoconstriction results in what?
|
Increase resistance & decrease bloodflow
|
|
Alpha 1 receptors are located where?
|
Skin
splanchnic regions
kidneys
inactive muscles
|
|
What is skeletal muscles response ot sympathetic vasoconstriction?
|
Skeletal muscle metabolic effects override any sympathetic vasoconstricting effects...causing vasodilation
|
|
In the sympathetic response to exercise is there constriction of the coronary and cerebral arteries?
|
No
|
|
Which circulation has a biphasic response? Initial vasoconstriction and then vasodilation.
|
Cutaneous circulation
|
|
What is the local response to exercise in muscle?
|
Active Hyperemia
Increase vasodilator metabolites (Lactate, K+,Adenosine)
Decrease in TPR
|
|
What is the initiating event for the response to hemorrhage?
|
Decrease in Arterial pressure
|
|
Within hours arterial pressure begins to return back to normal. True or false
|
True...this is compensatory
|
|
What is the response of the Renin-Angiotensin II-Aldosterone System to hemorrhage?
|
Decrease Arterial pressure=Decrease in Renal perfusion...stimulates secretion of Renin
|
|
What is the response of capillaries during hemorrhage?
|
Decrease capillary pressure favors filtration out of capillaries
|
|
Where are the volume receptors located that control ADH?
|
Atria
|
|
What 2 things do ADH do in response to hemorrhage?
|
Increase resorption by renal collecting ducts
Causes arteriolar vasoconstriction
|
|
How does pooling of blood in the extremities affect MAP?
|
Decreases
|
|
Slow reactive pupils think...
|
Cerebroischemia
|
