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The Kidney and Osmoregulationr - Coggle Diagram
The Kidney and Osmoregulationr
Selective reabsorption
in PCT
active transport of Na+ and K+
Secondary active transport of glucose and amino acids
co transporter protein
PCT cells
tight junction between cells
many mitochondria
microvilli
many co transporter proteins and Na+/K+ pump
folded basal membrane
If the water content in blood is low, cells will lose water by osmosis down a water potential gradient. This shrinking triggers stimulation of nerve cells to produce ADH from the posterior pituitary gland.
collecting ducks become more permeable to water. Water in collecting duct move into the tissue fluid and the to blood by osmosis down the water potential gradient
1.active phosphorylase is produced when ADH binds to the receptor protein
Aquaporins are added to the cell surface membrane
the vesicles is triggered to move toward and fuse with the cell surface membrane
potential of blood returns to set point, hence less water lost in urine
Loop of Henle
counter current mulitplier
Na+ and Cl- ions
ascending limb impermeable to water
Bowman's capsule
Afferent and efferent arterioles
hydrostatic pressure
Three layers
Capillary endothelium
fenestration
Basement membrane
selective barrier
Podocyte cells
glomerular filtrate
Ultrafiltration
Control of water potential of the blood:
When the body experiences dehydration, osmoreceptors in the hypothalamus detect this change
It sends nerve impulses to the posterior pituitary gland and releases ADH into the blood
This makes the walls of the DCT and collecting duct more permeable to water which increases the reabsorption of water from the tubules into the blood.
reabsorption in DCT
Na+ and K+ ions
Proximal convoluted tubules
More than 50% of filtrate take place in PCT
tight junction to hold the adjacent cell together so the fluid cannot pass through the cells
wall made uo of a single layer of cubical epithelial cells
microvilla to increase SA to increase absorption rate
many mitochondria to provide ATP for Na+K+ pump proteins on the outer membranes fo the cells
many co transporter protein in the membrane facing the PCT lumen.
beneath the cortex lies the medulla
beneath the capsule lies the cortex
covered by a capsule (tough outer shell)
Structure consists of:
the ureter carries urine from the kidney to the bladder
returns blood through the renal vein
receive blood from the renal artery
Kidney:
If a section of kidney are cut through and look under a microscope, there will consists thousands of nephrons and blood vessels.