Summary
Summary GCSE bio paper 2
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Bio E homeostatisai regulationofhaving a constant internal environment
theconditionsare maintained toenure optimumconditions
humanhomeostatis regulates
bloodglucose sugarlevels
reversaremonitored regulated
byon
body temperature
Y automaticcontrol system
waterlevels
nervousrespancenervous
system
chemicalapter endocrinesystem
Informationaboutthe enviormentis caned
a STIMULES andis detected by a
RECEPTOR detected
bya centralcoordinator Synapse agapbetweentwoneurons
system as aresponse totheEFFECTOR
human nervous
muscleandglands
Fii
allowslastshortmedresponseto a stimulus woman was tobeposedlion or mm
in thesurrandings next but canNOTbeposedason electricalimpulse
informationnearedatthereceptor passedalong usteddonebychemicalneutronsmelters
neurons asan electricalimpulse and results in andatthe list neuron
1 arrives at term comes a
emitterchemicalsinto a synapse
releaseat neutron
dendrities
ii m
siteonnextterminal
gfyoo.ijf.FM axon 3sitesarespecificforeachtypeof neutransmitter
nucleus ummmm ninny nm nm nm
, nucleus nerveimpure willonlybecreated in these d near when a
an body
myelinsheath compeineertrychemicalbends
axonterminal
theaxonistheman part of thenerve cell
longstretched out libre of cytoplasm with electricalimpulses will travel along
someaxons are surrounded byfattyacid insulate the electricalimpulse
branchedendingsconnectneuronstogether creating a Ntwan
motor
Relay neurone
t.IE
Y
ooo f
Sensory neurone
neurone
g II
nervous pathway
stimulus no receptor
sensory or CNS a motor responce
no ellector
neuron neurone
light
examples conecen in
eyereactingto
cells n ownreactingto changeis temp pressure
Wh d Mt
in response to stimuli its receivedby
Lexamples muscleorgrand
2 receptor andsentalongonelectricalimpurealong a in hes
ponce muscle may
sensoryneurone towardsthe am mmmm
3 CNS madeupbythebrain andspinalcord
, V deupby l rain and p
4 impulsepassedthroughrelay nearas and as a response tothe stimules is coordinated
consciouslyorunconsciously
5CNSsendsulormationabout theresponsealong a mator as an electrical impulse
6 ellecterrelieves theimpulse andcarries out nesponce
theendocrine system
majorglands in thebody
Reflexes
fastand automaticresponse to a particularstimules
which maybeharmful to organism
theyarequick toavoidpain ryung
invorentoyaction
pathwaywhichcarriesulomaton along isknown asReflex
Are
Hormones
chemicalmessengertransportedin bloodstream to an effector sotheycanactivate a nespance
producedandreleased
bytheglandsaroundthebody I make uptheendocrine system
neurons hormones
in the blood
hormonesreleased
speed fast
plasmatotheirtargetcells allect
duration short long
onlythosecells
targetarea specific general
human reproduction
tetostrone is the man reproductive n oestrogen is the man reproduction
ormore n'male hormone in females
, h females
produced n testes produced in ovaries
stimulatesproduction of sperm
duringpuberty this hormonesincreased
and stimulates on eggto be releasedfromtheway
called ovulation's on average 28days
adrenalgland adrenaline
pituitary gland LH FSM master d
testes testesdone
thyrode gland thyroxine
ovaries oestrogen progesterone
pancreas insulin
diabetes
type one
disorderaffecting thepancreas
poncneone doesnotproduce enough insulintocontrolthe blood
sugarlevel andso the levels
higher than normal bec me
treated by injection and insulin
type two
disorder ofellectorcells no longerrespond to the hormonereleasedfrom pancreas
managed through lifestylechoices
controlled diet
regularexcessive
control
of blood glucose
pancreasmonitesandregulatestheblood glucoseconcentration
blood glucose MM liver andmuscles
concentration www.n why convert the
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