Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
RBCs suspended in plasma cause a fictional drag on what
|
each other as well as against the vessel wall as they flow through
|
|
|
Blood viscosity is constant at what
|
3X the viscosity of water
|
|
|
Blood viscosity increases as what
|
the hematocrit increases
|
|
|
What does the normal hematocrit of viscosity of 3 mean
|
3X as much pressure is required to push whole blood through a vessels compared with water
|
|
|
blood viscosity increases as the
|
hematocrit increases
|
|
|
Increased hematocrit can equal a viscosity up to what
|
viscosity of up to 10
|
|
|
What are the resistance vessels
|
arterioles
|
|
|
venoconstriction insures that blood flow to the right heart matches what
|
cardiac output from the left heart
|
|
|
VR = ?
|
CO
|
|
|
since veins have greater compliance than arteries, they can accommodate a greater blood volume with little?
|
increase in intravascular pressure
|
|
|
clinically, sympathetic nervous system stimulation of arteriolar and venous constriction insures what
|
adequate blood circulation to vital organs continues during hemorrhage
|
|
|
mass sympathetic discharge equals what
|
diffuse vasoconstriction
|
|
|
name the priority organs for blood flow during hemorrhage
|
brain, kidneys and myocardium
|
|
|
Baroreceptor reflex of used by the sympathetic nervous system (inhibition) insures that veins do what to accommodate excess blood volume
|
dilate
|
|
|
What are the exceptions to parasympathetic activity in blood vessels
|
blood vessels within the salivary glands, lower GI tract, and genitals
|
|
|
How does parasympathetic activity affect circulatory function
|
by regulating heart rate
|
|
|
how does parasympathetic nervous system regulate heart rate
|
transmits impulses to the SA and AV nodes and both atria
|
|
|
in delayed compliance stress relaxation what initially occurs after increased blood volume
|
increased intravascular pressure
|
|
|
What is an example of delayed compliance: stress relaxation
|
normal physiological response to a blood transfusion
|
|
|
in Delayed Compliance: stress relaxation after minutes to hours, what occurs
|
blood vessel distention occurs and increased blood volume is accommodated and blood pressure decreases
|
|
|
What occurs in Delayed Compliance: reverse stress relaxation
|
blood vessels constrict as intravascular volume decreases
|
|
|
give an example of delayed compliance: reverse stress relaxation
|
the normal physiological response to severe hemorrhage or severe dehydration
|
|
|
this mechanism is effective if there is enough blood volume available
|
delayed compliance: reverse stress relaxation
|
