Lecture Quizzes E2 Flashcards
T or F Diffusion is the only important method of gas, nutrient and waste exchange across most capillaries
True - everywhere except for the brain
The more protein in a capillary … the (higher/lower) the osmotic pressure in the capillary
higher
Water moves toward (higher/lower) osmotic pressure
higher
Shear stress in arteries increases the production of
a. Angiotensin II
b. Endothelin-1
c. Epine
d. NO
e. Prostacyclin
f. Vasopressin
De - NO and Prostacyclin (want dilation in response)
Shear stress in arteries decreases the production of
a. Angiotensin II
b. Endothelin-1
c. Epine
d. NO
e. Prostacyclin
f. Vasopressin
B - endothelin - 1
The leakiest (most permeable) capillaries are in the
a. Brain
b. Heart
c. intestines
d. joints
e. kidneys
f. liver
g. lungs
h. nose
i. pancreas
j. spleen
F - the liver
T or F All of the fluid that filters out of the arterial end of a capillary is normally absorbed on the venous end of the capillary
False
Venoconstriction mainly
a. Decreases venous compliance b. Decreases venous resistance c. Increases venous compliance d. Increases venous resistance
Decrease venous compliance
Mean arterial pressure equals
Cardiac Output * TPR
What receptor is on veins?
Alpha 1 adrenergic receptor
Given the following, what is the net filtration pressure in mmHg?
Pc = 30 mmHg Pif = normal πc = 29 mmHg πif = 3 mmHg
4 mmHg
Compared to when you are laying down, when you are standing you have higher (para/symp) activity
You have higher sympathetic activity bc your bp would increase
The baroreceptor reflex is important for …
Short-term control of blood pressure
What is the most direct effect of hypovolemia (decrease in blood V)
Decreased Venous P bc that is where most of the blood in the body so it’s the first place you’ll see it
The efferent pathway of the baroreceptor reflex includes …
Angiotensin II, parasympathetic nerves and sympathetic nerves
