Question x1
5 x/ x5 xpts
Explain xtwo xreasons xwhy xa xwoman xwith xlow xlevels xof xLH xwould xnot xbe xable xto xbecome
xpregnant.
(1) xLH xacts xon xthe xovary xto xcause xovulation xto xoccur. x(2) xLH xcauses xprogesterone
xrelease xto xfacilitate xpotential xfertilization xof xthe xegg xand xpregnancy. xProgesterone xis xa
xkey xhormone xfor xthe xmaintenance xof xpregnancy.
Question x2
5 x/ x5 xpts
Would xyou xexpect xa xfemale xto xhave xtestosterone xin xtheir xbloodstream? xExplain xwhy xor xwhy
xnot.
(1) Yes. xBoth xmale xand xfemale xbodies xproduce x“all” xthe xsex xhormones. xHowever, xthe
xratios xare xdifferent.
(2) The xadrenal xglands xare xlargely xresponsible xfor xproducing xthis x“opposite”
xhormone xthat xthe xovaries xwould xnot.
Question x3
10 x/ x10 xpts
Label xthe xendocrine xglands x(A-
C) xA: x
B: x
C: x
, A: xPineal xgland
x B:
xHypothalamus
xC: xPituitary
xgland
Question x4
10 x/ x10 xpts
Explain xthe xconcept xof xpositive xfeedback. xGive xan xexample xof xa xhormone xthat xworks
xthrough xpositive xfeedback.
.
1- Positive xfeedback xis xthe xaction xof xa xhormone xincreasing xthe xproduction xof xthat
xhormone. x(This xis xthe xopposite xof xnegative xfeedback).
2- One xexample xis xthe xaction xof xoxytocin xcausing xthe xuterus xto xcontract xduring
xlabor. xOxytocin xenhances xthe xeffect xof xthe xuterus xcontractions, xcausing xmore
xoxytocin xto xbe
5 x/ x5 xpts
Explain xtwo xreasons xwhy xa xwoman xwith xlow xlevels xof xLH xwould xnot xbe xable xto xbecome
xpregnant.
(1) xLH xacts xon xthe xovary xto xcause xovulation xto xoccur. x(2) xLH xcauses xprogesterone
xrelease xto xfacilitate xpotential xfertilization xof xthe xegg xand xpregnancy. xProgesterone xis xa
xkey xhormone xfor xthe xmaintenance xof xpregnancy.
Question x2
5 x/ x5 xpts
Would xyou xexpect xa xfemale xto xhave xtestosterone xin xtheir xbloodstream? xExplain xwhy xor xwhy
xnot.
(1) Yes. xBoth xmale xand xfemale xbodies xproduce x“all” xthe xsex xhormones. xHowever, xthe
xratios xare xdifferent.
(2) The xadrenal xglands xare xlargely xresponsible xfor xproducing xthis x“opposite”
xhormone xthat xthe xovaries xwould xnot.
Question x3
10 x/ x10 xpts
Label xthe xendocrine xglands x(A-
C) xA: x
B: x
C: x
, A: xPineal xgland
x B:
xHypothalamus
xC: xPituitary
xgland
Question x4
10 x/ x10 xpts
Explain xthe xconcept xof xpositive xfeedback. xGive xan xexample xof xa xhormone xthat xworks
xthrough xpositive xfeedback.
.
1- Positive xfeedback xis xthe xaction xof xa xhormone xincreasing xthe xproduction xof xthat
xhormone. x(This xis xthe xopposite xof xnegative xfeedback).
2- One xexample xis xthe xaction xof xoxytocin xcausing xthe xuterus xto xcontract xduring
xlabor. xOxytocin xenhances xthe xeffect xof xthe xuterus xcontractions, xcausing xmore
xoxytocin xto xbe
