Renal anatomy & physiology Flashcards
Position of kidney in accordance verterbral level ?
Between T12-T13 vertebra
Amount of blood supply kidney receive?
20-25% cardiac output
Position of kidney in accordance location in abdomen ?
Retroperitoneal organ
Relation of hilum from anterior to posterior ?
Mnemonics : VAP
* renal vein
* renal artery
* renal pelvis
Covering of kidney from inside outwards ?
- Fibrous capsule
- Perirenal fat
- Renal fascia of gerota ( False capsule)
- Para renal fat
Agents causing Mesengial cell relaxation ?
- ANP
- Prostaglandin E2
- cAMP
- Dopamine
Hormones acting on Distal convoluted tubule ?
- Aldosterone
- ANP
- ADH
- Calcitriol
- PTH
Hormones acting on PCT ?
- PTH
- Angiotensin 2
3.Dopamine - Catecholamines
Peculiarities of trigone of bladder?
- Most fixed and Dependent part
- Rich vascular and nerve supply
- Developed from mesoderm
Parasympathetic supply of urinary bladder ?
S2 - S4
Detrusor contraction, internal sphincter relaxation
sympathetic supply of urinary bladder ?
T10-L2
Detrusor relaxation
I.U.S contraction
Somatic control of urinary bladder by?
Pudendal nerve
Site of action of Aldosterone in kidney ?
DCT & CT
site of action of ADH in kidney ?
DCT & CT
Site of action of ANP in kidney ?
DCT & CD
Site of action of PTH in kidney ?
PCT, DCT, Think ascending limb of loop of henle
Site of action of Epinephrine , nor epinephrine , Prostaglandin ?
Afferent & Efferent arteriole
Endocrine function of kidney ?
Kidney secretes :
1. Erythropoietin
2. Renin
3. 1,25 D cholecaciferol
4. Thromboxane
Metabolic function of kidney ?
- Gluconeogenesis
- Transamination
- Deamination
Substances completely reabsorbed by kidney ?
Completely reabsorbed: Glucose
Amino acid
Proteins
Vitamins
Acetoacetate ions
Partially reabsorbed by kidney?
Partially reabsorbed:
Water & electrolytes
Keto acids
Urea
Uric acid
Na+,K+, Ca2+,Mg2+,PO4, HCO3-
Substance not reabsorbed by kidney?
Inulin
Creatinine
Mannitol
Sucrose
What is Myogenic mechanism in autoregulation of Renal blood flow?
Renal afferent arterioles contract in response to stretch . Thus increased renal arterial pressure stretches the arterioles , which contract and increase resistance to maintain constant blood flow.
Most important buffer in blood ?
Bicarbonate buffer
most important buffer in RBC?
Haemoglobin buffer
Most important buffer in Plasma / ECF ?
Bicarbonate buffer
Most important buffer in urine?
Ammonia buffer
How kidney regulates acid base balance ?
Kidney regulates acid base balance by : 1.Secretion of H+
2. Reabsorption of filtered
HCO3
-3. Generation of new HCO3-
Diuretics acting on PCT ?
- Osmotic diuretic
- Carbonic anhydrase inhibitor
Diuretics acting on Collecting tubule?
- Aldosterone antagonist
- Na+ channel blocker
Diuretics acting on Early distal tubule ?
Thiazide diuretics
Diuretics acting on Thick ALLH ?
Loop diuretics
What is the limiting pH of urine
4.5
What is the countercurrent multiplier in nephron ?
Loop of henle
What is the countercurrent exchanger in nephron ?
Vasa recta
What are the functions of Mesangial cell ?
- uptake of immune complex
- Produce PG
- Have receptor for Angiotensin 2, ADH, Insulin like growth factor
Renin secreted by which cell ?
JG cell
What are the renal vasodilator ?
Mnemonic : BD তে PG NA
B: Bradykinin
D:Dopamine
PG: Prostaglandin
N: Nitric oxide
A: ANP
Which cell lies in the central region of glomerulus?
Mesangial cell
What are the characteristics of Mesangial cell?
/ Smooth muscle cell
/ Contractile
/ Vasoactive
Location of JG cell?
Afferent arteriole ( in tunica media)
Location of macula densa?
Distal tubule
Location of Lacis cell?
At the Junction between afferent & efferent arteriole
Physiological substance secreted by kidney ?
- Hydrogen ion
- Ammonia
- Potassium
Source of Angiotensin converting enzyme ?
Lungs
Source of Angiotensinogen?
Liver
Source of Angiotensin 2?
Kidney