Lab 9 The Endocrine System
a a a a BIO201L
(Lab 9) Straighter line Anatomy and Physiology 1 Lab
BIO201L The Endocrine System Work Sheet 2025 Updated
Pre-LabaQuestions
1. Whataisatheafunctionaofatheaendocrineasystem?
Theaendocrineasystemaregulatesaandacontrolsavariousabodilyafunctionsathroughatheaproductionandarele
aseaofahormonesaintoatheabloodstream.
2. Researchatwoatypesaofahormonesaandadescribeatheamodeaofaactionaforaeach.
Insulin:aInsulinaisaaahormoneaproducedabyatheapancreasathataplaysaaacrucialaroleainaregulatingablo
odasugaralevels.aItsamodeaofaactionainvolvesabindingatoaspecificainsulinareceptorsaonatargetacells,a
suchaasamuscleaandafatacells.aThisabindingaactivatesaaasignalingacascadeathatapromotesatheaupta
keaofaglucoseafromatheabloodstreamaintoacells,atherebyaloweringabloodasugaralevels.
ThyroidaHormones:aTheathyroidaglandaproducesahormonesacalledathyroxinea(T4)aandatriiodothyroni
nea(T3),awhichaareainvolvedainaregulatingametabolismaandaenergyaproduction.aThyroidahormonesae
nteratargetacellsaandabindatoanuclearareceptorsalocatedainatheacellanucleus.aThisabindingainitiatesag
eneatranscription,aleadingatoatheaproductionaofaproteinsathataaffectametabolism,agrowth,aandadeve
lopment.aThyroidahormonesaincreaseatheabasalametabolicarateaandainfluenceatheafunctionaofavario
usaorgansaandatissuesathroughoutatheabody.
3. Whichaglandaisabothaendocrineaandaexocrine?
pancreas
4. Whichahormonesacontrolatheafightaoraflightaresponse?
norepinephrine,aadrenaline,aandaepinephrine
5. Whataisatypea1adiabetesaandawhataisatheatreatmentaforathisadisease?
Typea1adiabetesaisaanaautoimmuneaconditionawhereatheabody'saimmuneasystemamistakenly
, Lab 9 The Endocrine System
a a a a BIO201L
attacksaandadestroysatheainsulin-
producingacellsainatheapancreas,aresultingainaaalackaofainsulinaproduction.aTheatreatmentaforatypea
1adiabetesainvolvesalifelongainsulinareplacementatherapyathroughamultipleadailyainjectionsaorathea
useaofaanainsulinapump,aalongawithacarefulamonitoringofabloodasugaralevels,abalancedadiet,aregula
raexercise,aandaeducationaonadiabetesamanagement.
6. DescribeahowaCa2+alevelsainatheabloodaarearegulatedabyahormones.
Parathyroidahormonea(PTH)aisareleasedawhenabloodacalciumalevelsaarealow,apromotingacalciumare
leaseafromabones,acalciumareabsorptionainatheakidneys,aandaactivationaofavitaminaDaforaincrease
dacalciumaabsorption.aCalcitoninaisareleasedawhenabloodacalciumalevelsaareahigh,ainhibitingacalci
umareleaseafromabones,areducingacalciumareabsorptionainatheakidneys,aandadecreasingacalciuma
absorptionafromatheaintestines,ahelpingatoalowerabloodacalciumalevels.
a a a a BIO201L
(Lab 9) Straighter line Anatomy and Physiology 1 Lab
BIO201L The Endocrine System Work Sheet 2025 Updated
Pre-LabaQuestions
1. Whataisatheafunctionaofatheaendocrineasystem?
Theaendocrineasystemaregulatesaandacontrolsavariousabodilyafunctionsathroughatheaproductionandarele
aseaofahormonesaintoatheabloodstream.
2. Researchatwoatypesaofahormonesaandadescribeatheamodeaofaactionaforaeach.
Insulin:aInsulinaisaaahormoneaproducedabyatheapancreasathataplaysaaacrucialaroleainaregulatingablo
odasugaralevels.aItsamodeaofaactionainvolvesabindingatoaspecificainsulinareceptorsaonatargetacells,a
suchaasamuscleaandafatacells.aThisabindingaactivatesaaasignalingacascadeathatapromotesatheaupta
keaofaglucoseafromatheabloodstreamaintoacells,atherebyaloweringabloodasugaralevels.
ThyroidaHormones:aTheathyroidaglandaproducesahormonesacalledathyroxinea(T4)aandatriiodothyroni
nea(T3),awhichaareainvolvedainaregulatingametabolismaandaenergyaproduction.aThyroidahormonesae
nteratargetacellsaandabindatoanuclearareceptorsalocatedainatheacellanucleus.aThisabindingainitiatesag
eneatranscription,aleadingatoatheaproductionaofaproteinsathataaffectametabolism,agrowth,aandadeve
lopment.aThyroidahormonesaincreaseatheabasalametabolicarateaandainfluenceatheafunctionaofavario
usaorgansaandatissuesathroughoutatheabody.
3. Whichaglandaisabothaendocrineaandaexocrine?
pancreas
4. Whichahormonesacontrolatheafightaoraflightaresponse?
norepinephrine,aadrenaline,aandaepinephrine
5. Whataisatypea1adiabetesaandawhataisatheatreatmentaforathisadisease?
Typea1adiabetesaisaanaautoimmuneaconditionawhereatheabody'saimmuneasystemamistakenly
, Lab 9 The Endocrine System
a a a a BIO201L
attacksaandadestroysatheainsulin-
producingacellsainatheapancreas,aresultingainaaalackaofainsulinaproduction.aTheatreatmentaforatypea
1adiabetesainvolvesalifelongainsulinareplacementatherapyathroughamultipleadailyainjectionsaorathea
useaofaanainsulinapump,aalongawithacarefulamonitoringofabloodasugaralevels,abalancedadiet,aregula
raexercise,aandaeducationaonadiabetesamanagement.
6. DescribeahowaCa2+alevelsainatheabloodaarearegulatedabyahormones.
Parathyroidahormonea(PTH)aisareleasedawhenabloodacalciumalevelsaarealow,apromotingacalciumare
leaseafromabones,acalciumareabsorptionainatheakidneys,aandaactivationaofavitaminaDaforaincrease
dacalciumaabsorption.aCalcitoninaisareleasedawhenabloodacalciumalevelsaareahigh,ainhibitingacalci
umareleaseafromabones,areducingacalciumareabsorptionainatheakidneys,aandadecreasingacalciuma
absorptionafromatheaintestines,ahelpingatoalowerabloodacalciumalevels.
