Chapter 20 Practice Quiz Flashcards
Which is the most significant factor affecting peripheral vascular resistance?
blood vessels diameter
Decrease of plasma osmotic pressure in the systemic capillary will __________________________reabsorption of fluid from interstitial space.
decrease
Which of these conditions occur as a result of increased angiotensin II production?
.
vasoconstriction
b.
increase venous return
c.
increase preload
d.
increase aldosterone secretion
When normal arterial blood pressure decreases, baroreceptors cause a response that
returns blood pressure to normal
If the liver was unable to produce normal quantities of plasma proteins, plasma osmotic pressure would________________________________________________________________
decrease
Increase of hydrostatic pressure in the capillary will ______________________________Net Filtration Rate .
increase
__________ mechanisms are most important for regulating arterial pressure on a short-term basis; __________ mechanisms are most important for regulating arterial pressure on a long-term basis.
baroreceptor / hormonal
At the capillary, __________ causes fluid to leave the capillary and __________ causes fluid to enter the capillary.
blood pressure (hydrostatic pressure) , osmosis (osmotic pressure)
Which capillary type would you claim to be the most permeable to large proteins?
sinusoid
Which statements are CORRECT?
Afterload is a resistance in arteries to ejection of blood by ventricles
Preload is the amount of venricular stretch at the end of ventricular diastole
inotropic agents alter contractility (force of the contraction of the heart)
Stroke volume is affected by afterload, preload, and contractility
Which capillary type would you claim to be the most permeable to large proteins?
sinusoid
Predict what would happen with the Heart rate (HR) , Stroke volume (SV), and Cardiac output (CO) with increased sympathetic output
Increased HR, increased SV, Increased CO
Increased HR, increased SV, Increased CO
decrease
Which of these conditions occur as a result of increased angiotensin II production?
Vasoconstriction
Increase venous return
Increase preload
Increase aldosterone secretion
Which statement is INCORRECT?
a.
Afterload is a resistance in arteries to ejection of blood by ventricles
b.
Preload is the amount of venricular stretch at the end of ventricular diastole
c.
inotropic agents alter contractility (force of the contraction of the heart)
d.
Stroke volume is affected by afterload, preload, and
Blood vessel diameter decreases(vasocondtriction) , peripheral vascular resistance ______________________
increases
__________ mechanisms are most important for regulating arterial pressure on a short-term basis; __________ mechanisms are most important for regulating arterial pressure on a long-term basis.
baroreceptor / hormonal
All of the following is true about blood pressure regulation
blood pressure depends on cardiac output and peripheral vascular resistance
increase of blood volume will lead to increase of blood pressure
increase of venous return will increase blood pressure
Decrease of hydrostatic pressure in the capillary will ______________________________Net Filtration Rate .
decrease
Which of these mechanisms results in increased blood pressure?
increased production of renin
Which of these mechanisms results in increased blood pressure?
increased production of renin
Blood vessel diameter increases (vasodilation) , peripheral vascular resistance ______________________
decreases
The walls of most blood vessels are innervated by
unmyelinated sympathetic neurons
Which is the most significant factor affecting peripheral vascular resistance?
blood vessels diameter
A single molecule of hemoglobin can transport up to ___ molecules of oxygen
4
An increase in plasma levels of erythropoietin will cause blood viscosity to__________________________________________________________________________________________
increase
Renin production increases when blood flow to the kidney_________________________
decrease
