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    The net filtration pressure (NFP) is the chief force pushing water and solutes out of the blood and across the filtration membrane. (a) True (b) False.

    Answer to: The net filtration pressure (NFP) is the chief force pushing water and solutes out of the blood and across the filtration membrane. (a)...

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    Question:

    The net filtration pressure (NFP) is the chief force pushing water and solutes out of the blood and across the filtration membrane.

    (a) True (b) False.

    Glomerular Filtration Membrane

    Glomerular filtration membrane is the structure through water, and solutes get filtered out from the blood. It comprises endothelium of glomerular capillaries with pores known as fenestrations, epithelium of Bowman's capsule (cells of this epithelium are known as podocytes), and a basement membrane between these two layers.

    Answer and Explanation:

    is a true statement.

    Net filtration pressure is the net or resultant force that pushes filtrate out of the blood.

    Net filtration pressure is glomerular blood hydrostatic pressure subtracted blood colloidal pressure (pressure due to plasma proteins) and capsular hydrostatic pressure ( pressure due to filtrate in Bowman's capsule).

    The standard value of net filtration pressure is 10mmHg.

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    The Nephron: The Glomerulus's Major Structures and Functions

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    Chapter 18 / Lesson 4

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    Understand the definition of nephron and glomerulus and learn about the parts of a nephron. Discover the anatomy, function, and location of the nephron and glomerulus, and learn about Bowman's capsule.

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    A&P ch 25 Urinary system Flashcards

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    A&P ch 25 Urinary system

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    Every day the kidneys filter nearly __________ of fluid from the bloodstream.

    -200 liters -50 liters -500 liters -100 liters

    Click card to see definition πŸ‘†

    200 liters

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    True or false: The perirenal fat capsule is a transparent capsule that prevents infections in surrounding regions from spreading to the kidney.

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    false

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    Terms in this set (46)

    Every day the kidneys filter nearly __________ of fluid from the bloodstream.

    -200 liters -50 liters -500 liters -100 liters 200 liters

    True or false: The perirenal fat capsule is a transparent capsule that prevents infections in surrounding regions from spreading to the kidney.

    false

    The __________ is the darker, reddish-brown area of the kidney that exhibits cone-shaped tissue masses called renal pyramids.

    -renal pelvis -renal medulla -renal cortex -renal column renal medulla

    Under normal resting conditions, the __________ arteries deliver one-fourth of the total cardiac output (about 1200 ml) to the kidneys each minute.

    -cortical radiate -interlobar -renal -segmental renal

    __________ are the structural and functional units of the kidneys, which carry out the processes that form urine.

    -Major calyces

    -Glomerular capsules

    -Nephrons -Renal pyramids Nephrons

    In what part of the nephron is plasma filtered?

    -collecting duct

    -proximal convoluted tubule

    -renal corpuscle

    -distal convoluted tubule

    -renal corpuscle

    The net filtration pressure (NFP) is the chief force pushing water and solutes out of the blood and across the filtration membrane.

    True or False

    False- The net filtration pressure (NFP), responsible for filtrate formation, involves forces acting at the glomerular bed. Glomerular hydrostatic pressure (HPg), which is essentially glomerular blood pressure, is the chief force pushing water and solutes out of the blood and across the filtration membrane.

    In situations where there is an extreme change of blood pressure (e.g., mean arterial pressure of less than 80 mm Hg), extrinsic controls take precedence over intrinsic blood pressure controls.

    True or false True

    Which of the following homeostatic imbalances is indicative that glomerular blood pressure may be too low to cause filtration?

    -renal ptosis -hydronephrosis -pyelitis -anuria -anuria

    The reason glucose is detected in the urine of individuals with uncontrolled diabetes is because __________.

    -glucose cannot be reabsorbed by the kidney

    -the transport maximum for glucose reabsorption has been exceeded

    -glucose is too large to be filtered by the nephron

    -glucose is secreted in the collecting ducts of diabetics

    -the transport maximum for glucose reabsorption has been exceeded

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    What two structures constitute the renal corpuscle?

    glomerulus and glomerular (Bowman's) capsule

    What arteries branch off the arcuate arteries?

    cortical radiate (interlobular) arteries

    In what part of the renal tubule does parathyroid hormone (PTH) promote the reabsorption of calcium ions?

    distal convoluted tubule (DCT)

    Which of the following is the most likely to cause pyelonephritis?

    infection of the urinary bladder

    Which vessels supply the cortical tissue of the kidney with blood?

    cortical radiate arteries

    What region of the male urethra runs through the urogenital diaphragm, extending about 2 cm from the prostate to the beginning of the penis?

    intermediate part of the urethra (membranous urethra)

    Which capillary bed produces filtrate?

    Glomerulus

    Which of the following is NOT a cause of anuria?

    vasodilation of afferent arterioles

    The __________ collect(s) urine, which drains continuously from the papillae; the urine is then emptied into the __________.

    calyces; renal pelvis

    Glomerular hydrostatic pressure (HPg) is the chief force pushing water and solutes out of the blood and across the filtration membrane.

    TRUE

    What hormone promotes active tubular secretion of potassium ions in the late distal convoluted tubule (DCT) and collecting ducts?

    Aldosterone

    In what part of the renal tubule are aquaporins scarce or absent so that water CANNOT be reabsorbed?

    ascending limb of the nephron loop

    In which kidney region are all renal corpuscles located?

    renal cortex

    Despite the fact that the kidney's intrinsic controls work to maintain a constant GFR, in some situations the body's extrinsic controls will work to override these intrinsic controls in order to maintain systemic blood pressure.

    TRUE

    Which statement best describes the effect diuretics have?

    Diuretics increase urinary output.

    Which pressure is the chief force pushing water and solutes out of the blood and across the filtration membrane of the glomerulus?

    hydrostatic pressure in glomerular capillaries (HPgc)

    Where does the efferent arteriole of the juxtamedullary nephron carry blood to?

    vasa recta

    The descending limb of the loop of Henle is permeable to both solutes and water.

    FALSE

    Which of the following substances is not normally found in filtrate?

    blood cells and large particles

    What is the primary driving force (pressure) that produces glomerular filtration?

    hydrostatic pressure of blood (blood pressure)

    Which of the following would only be found in the glomerular filtrate if the glomerular membrane were damaged?

    Protein

    If the osmotic pressure in the glomerular capillaries increased from 28 mm Hg to 35 mm Hg, would net filtration increase or decrease?

    net filtration would decrease

    Calculate the net filtration pressure if capillary hydrostatic pressure is 60 mm Hg, capillary osmotic pressure is 25 mm Hg, and capsular hydrostatic pressure is 10 mm Hg.

    25 mm Hg

    Which hormone(s) is/are required for facultative water reabsorption in the collecting ducts?

    ADH

    Since most patients with renal failure produce little or no urine, hemodialysis often involves removal of water from the blood. However, side-effects may develop if too much fluid is removed from the blood. Which of the following is NOT one of the potential side-effects?

    vasoconstriction of afferent arterioles

    Upon reaching what point in the nephron is reabsorption (1) dependent upon the body's needs at the time, and (2) regulated by hormones?

    distal convoluted tubule

    What is the juxtaglomerular apparatus?

    a system that regulates the rate of filtrate formation and systemic blood pressure

    The frequency of cystitis in men is lower than in women because ______.

    the male urethra is longer than the female urethra

    Fenestrated vessels that allow passage of all plasma elements but not blood cells.

    Glomerular capillaries

    May form meandering vessels or bundles of long straight vessels.

    efferent arterioles

    High pressure vessels that forces fluid and solutes into the glomerular capsule

    Afferent arterioles

    Low pressure, porous vessels that reabsorb solutes and water from the tubule cells.

    peritubular capillaries

    Play a role in urine concentration

    vasa recta

    Chemicals that enhance urinary output are called __________.

    Diuretics

    Which part of the brain controls the micturition reflex?

    Pons

    Which of the following is the functional unit of the kidney?

    Nephron

    Which vessel is present in the arterial pathway as blood flows into the kidney but NOT present in the venous pathway exiting the kidney?

    Segmental

    Which of the following best describes glomerular filtration rate (GFR)?

    the volume of filtrate created by the kidneys per minute

    GFR regulation mechanisms primarily affect which of the following?

    glomerular hydrostatic pressure (HPg)

    Which of the following are mechanisms of intrinsic control of glomerular filtration (renal autoregulation)?

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