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A&P II Bio test 5 part C
urinary tract
25
Anatomy
Undergraduate 1
11/01/2008

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Cards

Term
Can Angiotensin II cause the release of Aldersterone from the adrenal cortex?
Definition
Yes
Term
When Angiotensin Ii releases aldosterone, wht is reasorbed and what is secreted?
Definition
100% Reabsorption of Na+, Water follows, and Secretion of K+ or H+
Term
Can The Thirst center in hypothalmus be timulated by Angiotensin II releasing Aldosterone?
Definition
Yes, thirst center in hypothalmus is stimulated to increase blood volume
Term
Can Angiotensin II cause the release of ADH?
Definition
Yes
Term
What happens to the Efferent arterioles and smooth muscle cells when Angiotensin II causes the release of ADH?
Definition
Efferent artioles- vasocontriction which increases GFR
Smooth muscle cells- constrict to increase blood pressure which increases GFR
Term
What happens in Tubular Reabsorption?
Definition
99% of filtrate is returned to blood stream
Term
Which tube is responsible for the majority of reabsorption?
Definition
Proximal Convoluted Tubule containing microvilli
Term
Which tubule fine tunes reabsorption?
Definition
Distal Convoluted Tubule
Term
Which capillaries are involved in tubular reabsorption?
Definition
Vasa Recta and Peritubular Capilaries
Term
Where are the Peritubular Capillaries?
Definition
Around PCT and DCT
Term
Where are the Vasa Recta capillaries
Definition
Around Loop of Henle
Term
What is solvent drag?
Definition
Water leaving increases concentrations of K, Cl, HCO3-, and urea
Term
With Na+ reabsorption, what is it called when water follows salt?
Definition
Osmosis
Term
Where is glucose, amino acids, lactic acid, and other metabolites reabsorbed?
Definition
In PCT
Term
With regard to glucose, what is a Tm- transport maximum?
Definition
A symporter has a miximum amount for transport measured so if a substance is above Tm, it gets urinated
Term
What is Glucosuria?
Definition
Maximum blood glucose which can be completely reabsorbed = 120 mg/mL normal blood glucose level is 70 to 110 mg/mL
Term
What is a protein transporter that moves 2 substances in the same direction?
Definition
Symporter
Term
What process removes materials from blod and adds to the filtrate- most common are K+, H+ and NH4+?
Definition
Tubular secretion
Term
What does tubular secretion do?
Definition
Removes materials from blood and adds to the filtrate
Term
How is ammonia NH3 formed?
Definition
From deamination of amino acids in the liver
Term
How is NH4+ formed? (ammonium)
Definition
NH3 combines with H+ in the plasma
Term
If pH > 7.45, what happens to ammonia production
Definition
DECREASES amonia production in Alkalosis
Term
If pH<7.35, what happens to ammonia production?
Definition
INCREASES IN ACIDOSIS
Term
What is formed from Deamination reactions?
Definition
Urea
Term
What happens to pH when Nh3 + H =NH4?
Definition
Increases pH
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