LEC 21 BIOL 431
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1
What are the overall components of the urinary system?
Kidneys 2
ureters 2
Urinary bladder
urethra
ureters 2
Urinary bladder
urethra
2
What are the functions of the kidney in respect to excretory function?
Filters waste from body cell metabolism
NItrogenous waste ( ammonia and urea )
regulates pH (excreting H+ and HCO3- )
Filters excess sodium, chloride, phosphates
Tubular secretion - Fine tune the body
NItrogenous waste ( ammonia and urea )
regulates pH (excreting H+ and HCO3- )
Filters excess sodium, chloride, phosphates
Tubular secretion - Fine tune the body
3
What are the functions of the kidney is respect to endocrine function ?
Secrets:
Erithropoitic factor for erythropoiesis
Renin to convert angiotensinagen > angiotensin I
Actvivates Vit D for Ca+2 absorption
Erithropoitic factor for erythropoiesis
Renin to convert angiotensinagen > angiotensin I
Actvivates Vit D for Ca+2 absorption
4
What is the arterial blood flow starting from the aorta to the kidney?
R/L renal AA. > Segmental AA. > Interlobar (Cortical Radiate) AA. > Arcuate AA. > Interlobular AA. > (moving into cortex of kidney) > Afferent A. > glomerulus > efferent AA.
5
What is the venule flow from the Kidney back to the IVC?
Peritubular Capillaries (Vasa Recta) > Cortical Radiat V. > Arcuate V. > Interlobular V. > Renal V. > IVC
6
What are the components of a Nephron?
Glomerulus
Bowman’s Capsule
proximal convoluted tubule
loop of Henle
distal convoluted tube
collecting ducts
Bowman’s Capsule
proximal convoluted tubule
loop of Henle
distal convoluted tube
collecting ducts
7
What are the 2 sections of a nephron?
Renal tubules
Renal corpuscles
Renal corpuscles
8
What is the function and 2 parts of the renal corpuscle part of the nephron?
Site of filtration of blood plasma
1. Glomerulus
2. Glomerular capsule (bowman’s)
1. Glomerulus
2. Glomerular capsule (bowman’s)
9
What is the path of filtration in the renal corpuscle?
Passes through pores in the capillary endothelium > basement membrane > filtration slits in bowman’s capsule > renal tubules as urine