PSL300-ENDOCRINE: ENDOCRINE
PRINCIPLES (LECTURE 1) QUESTIONS
AND CORRECT ANSWERS
HomeostasisA2-A2Ans--
TheA2processA2ofA2maintainingA2aA2constantA2internalA2environmentA2despiteA2changingA2
conditions.
HowA2doesA2theA2internalA2environmentA2stayA2stable?A2-A2Ans--
ExternalA2andA2InternalA2changesA2causeA2lossA2inA2homeostasisA2andA2whenA2theA2orga
nismA2triesA2toA2compensate:
-A2IfA2theA2compensationA2fails,A2itA2leadsA2toA2illnessA2orA2disease.
-A2IfA2theA2compensationA2succeeds,A2itA2leadsA2toA2wellness.
HomeostasisA2isA2NOTA2what?A2-A2Ans--Equilibrium
HowA2doA2weA2maintainA2homeostasis?A2-A2Ans--FeedbackA2control
NegativeA2feedbackA2-A2Ans--StabilizingA2response,A2getsA2theA2bodyA2toA2homeostasis.
PositiveA2feedbackA2-A2Ans--
StimulatesA2theA2responseA2furtherA2andA2further,A2toA2reinforceA2theA2effectA2ofA2theA2sti
mulus,A2oppositeA2ofA2reachingA2homeostasis.
-A2RareA2phenomenonA2inA2theA2bodyA2butA2doesA2happen.A2
-A2ItA2isA2turnedA2offA2byA2anA2outsideA2factor.
RegulationA2ofA2cortisolA2secretionA2-A2Ans--AnA2exampleA2ofA2negativeA2feedback
-
A2TheA2negativeA2feedbackA2actionA2ofA2cortisolA2suppressesA2CRHA2releaseA2andA2ACT
HA2release.A2
-
WhenA2youA2haveA2enoughA2cortisolA2inA2theA2body,A2youA2don'tA2wantA2itA2toA2continueA2f
urther,A2youA2wantA2toA2turnA2itA2OFFA2andA2getA2backA2toA2homeostasis.
OxytocinA2andA2theA2controlA2ofA2uterineA2contractionsA2-A2Ans--
AnA2exampleA2ofA2positiveA2feedbackA2
-
DuringA2childbirth,A2theA2hormoneA2causesA2theA2uterusA2toA2contractA2andA2itA2isA2aA2cont
inuousA2stimulationA2ofA2theA2hormoneA2untilA2theA2babyA2(outsideA2factor)A2isA2delivered.
ImagineA2aA2hormoneA2thatA2isA2releasedA2inA2responseA2toA2lowA2bloodA2pressureA2andA2
actsA2toA2reduceA2bloodA2pressure.A2WhatA2isA2thisA2anA2exampleA2of?A2-A2Ans--
PositiveA2feedback
PRINCIPLES (LECTURE 1) QUESTIONS
AND CORRECT ANSWERS
HomeostasisA2-A2Ans--
TheA2processA2ofA2maintainingA2aA2constantA2internalA2environmentA2despiteA2changingA2
conditions.
HowA2doesA2theA2internalA2environmentA2stayA2stable?A2-A2Ans--
ExternalA2andA2InternalA2changesA2causeA2lossA2inA2homeostasisA2andA2whenA2theA2orga
nismA2triesA2toA2compensate:
-A2IfA2theA2compensationA2fails,A2itA2leadsA2toA2illnessA2orA2disease.
-A2IfA2theA2compensationA2succeeds,A2itA2leadsA2toA2wellness.
HomeostasisA2isA2NOTA2what?A2-A2Ans--Equilibrium
HowA2doA2weA2maintainA2homeostasis?A2-A2Ans--FeedbackA2control
NegativeA2feedbackA2-A2Ans--StabilizingA2response,A2getsA2theA2bodyA2toA2homeostasis.
PositiveA2feedbackA2-A2Ans--
StimulatesA2theA2responseA2furtherA2andA2further,A2toA2reinforceA2theA2effectA2ofA2theA2sti
mulus,A2oppositeA2ofA2reachingA2homeostasis.
-A2RareA2phenomenonA2inA2theA2bodyA2butA2doesA2happen.A2
-A2ItA2isA2turnedA2offA2byA2anA2outsideA2factor.
RegulationA2ofA2cortisolA2secretionA2-A2Ans--AnA2exampleA2ofA2negativeA2feedback
-
A2TheA2negativeA2feedbackA2actionA2ofA2cortisolA2suppressesA2CRHA2releaseA2andA2ACT
HA2release.A2
-
WhenA2youA2haveA2enoughA2cortisolA2inA2theA2body,A2youA2don'tA2wantA2itA2toA2continueA2f
urther,A2youA2wantA2toA2turnA2itA2OFFA2andA2getA2backA2toA2homeostasis.
OxytocinA2andA2theA2controlA2ofA2uterineA2contractionsA2-A2Ans--
AnA2exampleA2ofA2positiveA2feedbackA2
-
DuringA2childbirth,A2theA2hormoneA2causesA2theA2uterusA2toA2contractA2andA2itA2isA2aA2cont
inuousA2stimulationA2ofA2theA2hormoneA2untilA2theA2babyA2(outsideA2factor)A2isA2delivered.
ImagineA2aA2hormoneA2thatA2isA2releasedA2inA2responseA2toA2lowA2bloodA2pressureA2andA2
actsA2toA2reduceA2bloodA2pressure.A2WhatA2isA2thisA2anA2exampleA2of?A2-A2Ans--
PositiveA2feedback