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Urinary System-Lecture Quiz

A&P Urinary System-Lecture
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Side ASide B
A major function of urinary system is excretion of:
wastes (organic).
Urinary system regulates plasma concentrations of:
important ions.
Urinary system regulates blood volume and thus:
blood pressure.
Regulates blood volume by adjusting the volume of H2O in the urine using:
ADH and Aldosterone.
Regulates blood volume by releasing ______ to increase RBC production.
EPO
Renin-Angiotensin I-Angiotensin II-__________.
Aldosterone
If the blood is too acidic, kidneys release ______ in urine.
H+
If the blood is to alkaline, kidneys release ______in urine.
HCO3-
Activation of vitamin D occurs under the regulation of:
PTH.
The kidneys assist the liver in:
detoxifying toxins.
Covers the entire surface of the kidney.
Renal Capsule
Surrounds the renal capsule.
Adipose Capsule
Anchors the kidneys to the abdominal wall.
Renal Fascia
Urine is made in the:
nephron.
Filtration occurs in the:
renal corpuscle.
Reabsorption occurs in the:
PCT, Loop of Henle, DCT and collecting duct.
Secretion occurs in the:
DCT and other areas.
Filtering in the kidneys is done on the basis of:
size.
Important nutrients like ____, ______ and _____ are reabsorbed back into the blood.
amino acids, glucose and vitamins
Almost all of the H2O in the nephron will be:
reabsorbed.
Capillary network across which filtration occurs.
Glomerulus
Force of _________ forces out H2O and other small molecules in the glomerulus.
blood pressure
About _____ L of filtrate enter the nephrons each day.
180
Filtrate enters the tubule at the:
Bowman's capsule.
Inner, visceral layer of Bowman's capsule is composed of special cells called ______ that aid...
podocytes
MUCH reclaiming of H2O and nutrients occurs here.
Proximal Convoluted Tubule
_____% of the H2O and _____% of the nutrients are reabsorbed in the PCT.
60 and 65
PCT are lined with _____ that aid in absorption.
microvilli
Na+ and H2O are regulated here.
Loop of Henle
Na+ is actively pumped out of the thick, ________ loop.
ascending
H2O moves out by osmosis in the thin,________ loop.
descending
The high _________ pulls water out of the tubule and into the peritubular capillaries following...
salt gradient
______% of the H2O entering the nephron is reclaimed in Henle's Loop.
20
The arrangement of the opposite flow in the tubule and the peritubular capillaries is called...
countercurrent mechanism
H2O absorption occurs in the DCT and collecting duct only if _____ is present.
ADH
ADH is released by the __________.
posterior pituitary
In _______, no ADH is present. 
diabetes insipidus
ADH makes the tubule _______ to water so it can be drawn out.
permeable
Promotes Na+ retention of the kidney.
Aldosterone
In order to have H2O leave the nephron _____ must be present.
ADH
Aldosterone turned on by _______ and _______.
high K+ and angiotensin II
If aldosterone pumps are not working, urine _______.
increases
K+ secretion is controlled by _________.
aldosterone
Aldosterone regulates both the retention of ____ and excretion of _____.
Na+ and K+
The juxtaglomelular apparatus is an endocrine structure that secretes ________ and _______.
renin and EPO
Diuretics act to ______ urine production.
increase


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