Objectives
define
excretion
process
remove
substances
result
metabolism
out
of
body
occur
via
urination
exhale
CO2
sweating
large
intestine
excretion
bile
pigments
not
undigested
substances
defaecation
not
excretion
eg
corn
osmoregulation
draw & label
diagram
kidney
annotate
diagram
glomerulus
nephron
explain
process
ultra
filtration
reabsorption
glucose
water
salt
include
microvilli
osmosis
transport
active
roles
loop
of
Henle
medulla
collecting
duct
ADH
vasopressin
comparison
concentration
protein
glucose
urea
in
blood plasma
glomerular
filtrate
urine
presence
glucose
in
diabetic
patients
maintain
balance
water
in
blood
structure mechanism
nephron
production
urine
filtration
blood
goes
through
spores
in
glomerulus
to
Bowman's capsule
smalls
speed
high
pressure
afferent
narrow
half
normal
capillaries
bottle neck
substances
including
water
glucose
ions
amino acids
urea
not
big
cells
protein
reabsorption
proximal
convoluted
tubule
reabsorb back to blood
glucose
all
thus
diabete
diagnosis
amino acids
salt
most
sodium
water
osmosis
gradient
concentration
active transport
energy
respiration
cells
renal
tubule
remain
urea
mostly
urine
at
collecting
ducts
Mechanism
Osmoregulation
water concentration in blood
low
increase
release
ADH
less
urine
high
decrease
release
ADH
more
urine
ADH
Negative feedback
osmoreceptor
hypothalamus
detect
solute
concentration
in
blood
plasma
high
trigger
release
ADH
Anti Diuretic Hormones
stop
drying
from
hypothalamus
neurosecretory
cells
send
impulse
release
hormones
store
posterior
pituitary
glands
transported
blood
kidney
mechanism
increase
reabsorption
water
into
blood
by
increase
permeability
collecting duct
wall
result
more
water
in blood
solute
concentration
decrease
osmoreceptor
inhibit
release
ADH
function
removal
nitrogenous waste
forms
ammonia
toxicity
high
pathway
diffusion
water
body
surface
users
fish
aquatic
environment
urea
product
digestion
protein
from
liver
through
renal arteries
toxicity
100,000 less than ammonia
pathway
liquid
excretion
users
mammals
amphibian
adult
sharks
turtles
Urine
urea
produced
by
liver
deamination
breakdown
excess
amino acids
protein
can't
be
stored
component
Components of liquid
Protein
0
7
0
0
Glucose
0.1
0.1
0
0
Urea
0.15
0.03
0.03
2
Sodium
0.3
0.3
0.3
0.3
Water
96
92
99
99
uric acid
toxicity
pathway
semi solid paste
excretion
insoluble
users
snail
birds
insect
reptiles
most
adjustment
concentration
level
ions
water
Disease
therapy
kidney
dialysis
machines
filter
blood
like
nephron
let
kidney
rest
recover
transplant
issues
rejection
clone