l OM oAR cP SD 54 44 1 71 6

l OM oAR cP SD | 54 44 1 71 6

Q:l Answerl thel followingl question.l Explainl inl detaill howl PTHl andl calcitoninl workl tol maintainl calciuml balance.

Answer:

Calcitonin:l producedl byl thel thyroidl glands,l depositsl calciuml intol bone.l Calcitoninl opposesl thel ac!onl ofl PTH.l Whenl thel bloodl calciuml levell reachesl thel appropriatel levell throughl alll thesel means,l thel parathyroidl glandsl stopl producingl PTHl throughl nega!vel feedback.l PTH:l producedl byl thel parathyroidl glandsl increasel thel amountl ofl calciuml inl thel blood.l (Anyl onel ofl thel followingl explana!onsl ofl PTHl isl acceptable)l PTHl s!mulatesl thel increasedl absorp!onl ofl calciuml froml thel intes!nes.l PTHl retainsl calciuml throughl excre!ngl phosphatel atl thel kidneys.l Inl thel bones,l PTHl promotesl thel ac!vityl ofl osteoclastsl tol demineralizel ofl thel bone,l increasingl thel amountl ofl calciuml inl thel blood.

Q:l Explainl whyl itl wouldl bel harmfull tol havel anl increasedl secretionl ofl ACTHl inl someonel whol isl diabetic.

Answer:

ACTHl controlsl thel secretionl ofl cortisoll froml thel adrenall cortex.l Increasedl levelsl ofl ACTHl wouldl causel increasedl levelsl ofl cortisoll withinl thel blood.l Cortisoll increasesl bloodl glucosel levelsl whichl willl decreasel thel effectivenessl ofl insulinl treatments.

Q:l Whichl hormone/sl arel involvedl inl milkl production?l A.l Thyroxinl B.l Oxytocinl C.l Prolactinl D.l Bl &Cl E.l A&B

Answer:

C

Q:l Wherel isl thyroidl stimulatingl hormonel produced?l A.l Pineall B.l Thyroidl C.l Thymusl D.l Anteriorl Pituitaryl E.l Posteriorl Pituitary

BIOLl251/l BIOL251l Modulel 6l W/Labl Exam:l

(Latestl 2026/l 2027l Update)l 100%l Verifiedl Questionsl &l Answersl |l Gradel A 1 / 4

l OM oAR cP SD | 54 44 1 71 6

Answer:

D

Q:l Whichl glandl decreasesl inl sizel withl age?l

Thyroidl Thymusl Pituitaryl Adrenal

Answer:

Thymus

Q:l Whichl cellsl maturel inl thel thymus?l A.l Bl cellsl B.l Tl cellsl C.l Redl bloodl cellsl D.l thel isletsl ofl Langerhansl E.l Al &l B

Answer:

B

Q:l Iodinel isl neededl tol producel whichl hormone/s?l A.l Gonadotropicl B.l T3l C.l T4l D.l TSHl E.l Bl &l Cl (Thyroidl hormonesl cannotl bel producedl withoutl iodine)

Answer:

E

Q:l Iodinel isl neededl tol producel whichl hormone/s?l

A.l T3/T4l B.l Gonadotropicl C.l ACTHl D.l TSHl E.l Al &l D

Answer:

A

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l OM oAR cP SD | 54 44 1 71 6

Q:l Whichl ofl thel followingl isl NOTl al functionl ofl oxytocin?l

Growthl ofl uterusl andl vaginal Uterinel contractionl Milkl letdownl Givenl tol aidl inl childbirthl process

Answer:

Growthl ofl uterusl andl vagina

Q:l Whichl ofl thel followingl isl NOTl al functionl ofl oxytocin?l

Uterinel contractionl Bonel growthl Milkl letdownl Givenl tol aidel inl childbirthl process

Answer:

Bonel growth

Q:l Whichl hormonesl arel producedl inl thel anteriorl pituitary?l

TSH,l MSH,l andl calcitoninl ADH,l GH,l andl prolactinl ACTH,l FSH,l andl GH.l PTH,l TSH,l andl LH

Answer:

ACTH,l FSH,l andl GH

Q:l Whichl hormonesl arel producedl inl thel anteriorl pituitary?l

A.l TSH,l MSH,l andl calcitoninl B.l ADH,l GH,l andl prolactinl C.l PTH,l TSH,l andl FHl D.l ACTH,l GH,l andl prolactin

Answer:

D

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l OM oAR cP SD | 54 44 1 71 6

Q:l Explainl inl detaill whyl thel thyroidl becomesl enlargedl duringl anl iodinel deficiency?

Answer:

Whenl therel isl al lowl levell ofl thyroxinl inl thel blood,l thel anteriorl pituitaryl con!nuesl tol producel TSH.l Thel thyroidl respondsl byl increasingl inl sizel andl producingl al goiter,l butl thisl increasel inl sizel isl ineffec!vel becausel ac!vel thyroxinl cannotl bel producedl withoutl iodine.

Q:l Aldosteronel isl involvedl inl thel regulationl ofl sodiuml andl potassiuml inl thel body.l Explainl howl tool muchl aldosteronel couldl contributel tol highl bloodl pressure.

Answer:

Aldosterone'sl primaryl targetl organl isl thel kidney,l wherel itl promotesl renall absorptionl ofl sodiuml andl renall excretionl ofl potassium.l Thel bloodl sodiuml levell isl particularlyl importantl tol thel maintenancel ofl bloodl pressure.l Tool muchl sodiuml causesl retentionl ofl fluidl andl increasesl bloodl pressure.l Therefore,l tool muchl aldosteronel willl causel increasedl andl potentiallyl highl bloodl pressure.

Q:l Matchingl eachl ofl thel followingl conditionsl withl thel onel bestl explanationl (1-5):l 1.l Jetl Lagl F.l Melatoninl productionl isl producedl accordingl tol body'sl normall rhythml 2.l Pituitaryl dwarfl A.l Underproductionl ofl GHl asl al childl 3.l Acromegalyl C.l Overproductionl ofl GHl asl anl adultl 4.l Inflammationl E.l Cortisoll helpsl tol counteractl thisl conditionl 5.l Tetanyl H.l Resultsl ifl calcitoninl isl notl producedl inl responsel tol lowl bloodl calcium

Answer:

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Q:l Matchingl eachl ofl thel followingl conditionsl withl thel onel bestl explanationl (1-5):l 1.l Congenitall hypothyroidisml C.l Lowl thyroxinl productionl sincel birthl 2.l Pituitaryl giantl A.l Overproductionl ofl GHl asl al childl 3.l Acromegalyl H.l Overproductionl ofl GHl asl anl adultl 4.l Tetanyl F.l Resultsl ifl PTHl isl notl producedl inl responsel tol lowl bloodl calciuml 5.l Anemial E.l Lackl ofl erythropoietinl tol actl onl thel bonel marrow

Answer:

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