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KIDNEY
OSMOREGULATION
ULTRAFILTRATION
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Created by
Jasmine Singh
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Cards (4)
KEY STAGES OF OSMOREGULATION IN THE NEPHRON?
Formation of
glomerular filtrate
by
ultrafiltration
Reabsorption
of
glucose
and
water
by the
proximal convoluted tubule
Maintenance
of
sodium ion gradient
in the
medulla
by the
loop of Henle
Reabsorption
of
water
by the
distal convoluted tubule
and
collecting ducts
PROCESS OF ULTRAFILTRATION?
Blood enters
Bowman's Capsule
Build up
of
hydrostatic pressure
in
glomerulus
Water
,
mineral ions
and
glucose squeezed out
of
glomerular capillary
Forms
glomerular filtrate
Blood cells
and
large proteins
too large
to
pass across
into
renal capsule
WHAT RESTRICTS MOVEMENT OF SUBSTANCES OUT THE GLOMERULUS?
connective tissue
and
endothelial cells
of
blood capillary
epithelial cells
of
renal capsule
hydrostatic pressure
of
fluid
in
renal capsule space
low water potential
of
blood
in
glomerulus
WHAT REDUCES THE BARRIER RESTRICTING MOVEMENT OF SUBSTANCES OUT THE GLOMERULUS?
PODOCYTES
make up
inner layer
of
renal capsule
highly specialised cells
gaps
between them
allow
filtrate
to pass through
CAPILLARY ENDOTHELIUM
gaps
up to
10 nm wide
between them
allow
filtrate
to pass through
