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
Aortic arch baroreceptor afferents travel through which nerve?
The vagus nerve
Standing leads to more (filtration/absorption out of/into) the capillaries in the feet
More filtration out of the capillaries in the feet
What organ releases the most erythropoietin in a healthy individual?
The kidney
Why does blood flow to the heart increase during exercise?
Active hyperemia
What does blood flow to the skin increase during exercise?
Sympathetic withdraw
Does blood flow to the skeletal muscle increase or decrease during exercise? Why?
Increase because of active hyperemia
Which of the following would increase diastolic P?
a. Increasing TPR b. Increasing HR c. Increasing PP
ABC - all three
Which organs see an increase in blood flow during strenuous exercise?
The brain, heart, skeletal muscles, and the skin
The clotting cascade normally starts with the (intrinsic/extrinsic) pathway
The extrinisic pathway
Protein C binds directly to
Thrombin
Which of the following proteins cause fibrinolysis
Plasmin
What is a cofactor for clotting factor IX
Factor VIII
Which of the following proteins is involved in the formation of the platelet plug?
a. Fibrin
b. Fibrinogen
c. Plasmin
d. Protein C
e. Prothrombin
f. Thrombin
g. Thrombomodulin
h. Thromboplastin
i. Tissue factor
j. Von willebrand factor
Fibrinogen and the vonwillebrand factor
