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18 Dec 2019

. Describe the effects on renal blood flow, local pressures
and GFR following vasoconstriction of: 1) the afferent
arteriole, 2) the efferent arteriole, and 3) an equal increase
in both.

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31 Dec 2019
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Related questions

1. Which of the following vessels, if stimulated to vasoconstrict, would cause increased filtration in the glomerular capillaries?
(a) Afferent arteriole​(c) Efferent arteriole
(b) Vasa recta​(d) Peritubular capillaries
2. Which of the following CORRECTLY describes the flow of filtrate through the renal tubule?
(a) Glomerulus à Distal convoluted tubule à Ascending limb of nephron loop à Descending limb of nephron loop à Proximal convoluted tubule à Collecting duct
(b) Glomerulus à Proximal convoluted tubule à Descending limb of nephron loop à Ascending limb of nephron loop à Distal convoluted tubule à Collecting duct
(c) Glomerulus à Proximal convoluted tubule à Ascending limb of nephron loop à Descending limb of nephron loop à Distal convoluted tubule à Collecting duct
(d) Glomerulus à Distal convoluted tubule à Descending limb of nephron loop à Ascending limb of nephron loop à Proximal convoluted tubule à Collecting duct
3. Tubular ______________ occurs when certain substances (i.e. ions, drugs) are removed from the bloodstream and placed back into the renal tubule.
(a) Elimination​(c) Secretion
(b) Reabsorption​(d) Filtration
4. Which of the following is TRUE about the reabsorption process in the proximal convoluted tubule?
(a) Na + ions are actively transported out of the tubule and into the peritubular capillaries
(b) Negatively charged ions (e.g. chloride) are transported out of the tubule in response to the movement of sodium
(c) Water is reabsorbed into the peritubular capillaries because of the increased osmotic pressure
(d) All of the above
5. Which of the following statements is FALSE about the glomerulus and the processes that occur there?
(a) Capsular hydrostatic pressure refers to the pressure of fluid pressing on the capsule and opposes filtration
(b) Net filtration pressure in the glomerulus is the difference between forces favoring filtration and forces opposing filtration
(c) Blood from the afferent arteriole is filtered by size when it enters the glomerulus because of the many fenestrae
(d) Vasoconstriction of the efferent arteriole lowers glomerular filtration rate
6. The descending limb of the nephron loop is impermeable to water while the ascending limb of the nephron is permeable to water.
(a) True​(b) False
7. Which of the following vessels takes blood out of the renal corpuscle and returns it to the bloodstream?
(a) Peritubular capillary system​(c) Vasa recta
(b) Efferent arteriole​(d) Afferent arteriole
8. Under the influence of ADH, the ___________________ and the _________________ become permeable to water and water is reabsorbed.
(a) Proximal convoluted tubule, Nephron loop
(b) Distal convoluted tubule, Nephron loop
(c) Proximal convoluted tubule, Collecting duct
(d) Distal convoluted tubule, Collecting duct
9. What is the name of the region inside the bladder bounded by the two uretal openings and the urethra?
(a) Trigone​(c) Mucous layer
(b) Detrusor muscle​(d) Transitional epithelium
10. During the accumulation of urine, the bladder distends, allowing stretch receptors in the transitional epithelium to be stimulated.
(a) True​(b) False

(1) An arteriole undergoes vasomotion andshrinks from 4 mm in diameter to 2 mm. If MAP remains the same, theflow of blood will drop by what percentage?


a.about 95%


b.about 50%


c.about 60%


d.about 80%


e.about 120%


(2)_________has themost important effect on blood flow through the capillarybeds.


a.Bloodviscosity


b.Vesselradius


c.Bloodosmolarity


d.Hematocrit


e.Vessellength
1.Activation of theRAAS results in both vasoconstriction and increased reabsorbtion ofwater. correct or incorrect?


2. An increase in ADH will trigger a diuresis. corrector incorrect?

3.An increase in BNPcauses the retention of fluid by the kidney to increase preload andcardiac output. correct or incorrect?

4.Reduced renal blood flow results in stimulation of the RAAS.correct or incorrect?

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