Ch 18: Online 1 Flashcards
Urinary System
Podocytes are part of what?
Bowman’s capsule
Renal filtration take place from where to where?
Glomerulus to Bowman’s capsule
What is the blood pressure in the glomerulus?
60 mm Hg, higher than in other capillaries
Filtration is selective in terms of what?
Size only
What part of the renal tubule has microvilli?
Proximal convoluted tubule
Water is reabsorbed by what process?
Osmosis
What hormone increases the reabsorption of sodium ions?
Aldosterone
What amount of filtrate is reabsorbed?
99%
What is normal pH range
4.6 to 8.0
What is average pH level?
6
The specific gravity of urine is….?
An indication of concentration
What do the kidneys do to help maintain normal blood pH?
Usually secrete hydrogen ions
What vitamin is activated by the kidneys?
Vitamin D
What hormone is secreted by the kidneys?
Erythropoietin, when blood oxygen decreases
What is the internal urethral sphincter made of?
Smooth muscle
Is the internal urethral sphincter voluntary or involuntary?
Involuntary
What takes place from the Glomerulus to the Bowman’s capsule?
Renal filtration
60 mm Hg, higher than in other capillaries, is the blood pressure of what?
Glomerulus
What is selective in terms of size only in the urinary system?
Filtration
What is reabsorbed by osmosis?
Water
The hormone aldosterone increases the reabsorption of what?
Sodium ions
Vitamin D is activated by what organ?
Kidneys
Why do the kidneys secrete hydrogen ions?
To help maintain normal blood pH
When do the kidneys secrete the hormone erythropoietin?
When blood oxygen decreases
