ENDOCRINE SYSTEM PORTAGE
LEARNING QUESTIONS AND ANSWERS
Questionq1
5q/q5qpts
ExplainqtwoqreasonsqwhyqaqwomanqwithqlowqlevelsqofqLHqwouldqnotqbeqableqtoqbecomeqpregnant.
(1)qLHqactsqonqtheqovaryqtoqcauseqovulationqtoqoccur.q(2)qLHqcausesqprogesteroneqreleaseqtoqfa
cilitateqpotentialqfertilizationqofqtheqeggqandqpregnancy.qProgesteroneqisqaqkeyqhormoneqforqthe
qmaintenanceqofqpregnancy.
Questionq2
5q/q5qpts
Wouldqyouqexpectqaqfemaleqtoqhaveqtestosteroneqinqtheirqbloodstream?qExplainqwhyqorqwhyqnot.
(1) Yes.qBothqmaleqandqfemaleqbodiesqproduceq“all”qtheqsexqhormones.qHowever,qtheqratiosq
areqdifferent.
(2) Theqadrenalqglandsqareqlargelyqresponsibleqforqproducingqthisq“opposite”qhormoneqthatq
theqovariesqwouldqnot.
Questionq3
10q/q10qpts
Labelqtheqendocrineqglandsq(A-
C)qA:q
B:q
C:q
, A:qPinealqglandq B
:qHypothalamusq
C:qPituitaryqgland
Questionq4
10q/q10qpts
Explainqtheqconceptqofqpositiveqfeedback.qGiveqanqexampleqofqaqhormoneqthatqworksqthroughqpositiv
eqfeedback.
.
1- Positiveqfeedbackqisqtheqactionqofqaqhormoneqincreasingqtheqproductionqofqthatqhormone.q
(Thisqisqtheqoppositeqofqnegativeqfeedback).
2- Oneqexampleqisqtheqactionqofqoxytocinqcausingqthequterusqtoqcontractqduringqlabor.q
Oxytocinqenhancesqtheqeffectqofqthequterusqcontractions,qcausingqmoreqoxytocinqtoqbe