D236:./,Pathophysiology./,Prep./,with./,Detailed./,Rationales
Course./,Code:./,D236
Course./,Name:./,Pathophysiology
Topic:./,Ultimate./,Advanced./,Practice./,Study./,Bank
Academic./,Year:./,2026/2027
1../,Which./,biological./,sequence./,correctly./,highlights./,how./,the./,human./,imm
une./,system./,responds./,to./,an./,infection?
A../,B./,cells./,produce./,cytokines,./,which./,directly./,mutate./,viral./,protein./,frag
ments.
B../,T./,cells./,produce./,cytokines,./,which./,stimulate./,B./,cells./,to./,differentiate./,a
nd./,produce./,antibodies.
C../,Cytokines./,directly./,neutralize./,foreign./,bacteria,./,bypassing./,B./,and./,T./,ly
mphocytes.
D../,Erythrocytes./,release./,histamines./,to./,stimulate./,helper./,T./,cells.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,When./,the./,body./,encounters./,a./,pathogen,./,antigen-
presenting./,cells./,activate./,T./,cells./,(specifically./,Helper./,T./,cells/CD4+)../,Th
ese./,T./,cells./,secrete./,signaling./,molecules./,called./,cytokines,./,which./,signal./,
and./,stimulate./,B./,cells./,to./,proliferate./,and./,differentiate./,into./,plasma./,cells,./,
which./,subsequently./,produce./,targeted./,antibodies../,Cytokines./,themselves./
,do./,not./,directly./,neutralize./,pathogens./,or./,mutate./,proteins,./,nor./,do./,erythro
,
cytes./,release./,histamines.
2../,What./,is./,the./,fundamental./,role./,of./,cellular./,DNA./,changes./,in./,congenita
l./,abnormalities?
A../,They./,induce./,transient./,physiological./,changes./,without./,altering./,cellula
r./,transcription.
B../,They./,cause./,persistent./,mutations./,in./,genes./,or./,structural./,chromosomal.
/,abnormalities./,that./,disrupt./,embryogenesis.
C../,They./,selectively./,accelerate./,mitochondrial./,replication./,during./,the./,thir
d./,trimester.
D../,They./,prevent./,environmental./,teratogens./,from./,crossing./,the./,placental./,
barrier.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Congenital./,abnormalities./,arise./,from./,altered./,genetic./,
blueprints./,during./,fertilization./,or./,early./,fetal./,development../,These./,DNA./,
changes./,introduce./,inherited./,or./,de./,novo./,mutations./,in./,genes./,or./,structura
l/numerical./,chromosomal./,abnormalities./,(such./,as./,trisomies./,or./,deletions
),./,leading./,to./,malformed./,or./,nonfunctional./,proteins./,that./,disrupt./,normal./,
organogenesis./,and./,tissue./,development../,They./,do./,not./,prevent./,teratogeni
c./,damage./,or./,limit./,themselves./,to./,transient./,changes.
3../,How./,do./,direct./,alterations./,of./,DNA./,during./,fetal./,development./,disrupt./,
physiological./,structures?
A../,By./,reducing./,cell./,membrane./,cholesterol./,content.
B../,By./,rewriting./,structural./,or./,regulatory./,codes,./,resulting./,in./,congenital./,
abnormalities.
,C../,By./,entirely./,eliminating./,protein./,translation./,within./,target./,tissues.
D../,By./,converting./,somatic./,epithelial./,tissue./,into./,active./,germline./,cells.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Congenital./,malformations./,are./,driven./,at./,a./,molecular./,
level./,by./,alterations./,of./,DNA../,When./,the./,genetic./,code./,is./,altered./,by./,muta
gens,./,replication./,errors,./,or./,errors./,in./,chromosomal./,segregation,./,the./,tran
scriptional./,blueprint./,is./,permanently./,rewritten../,This./,leads./,to./,defective./,s
ignaling./,pathways,./,incorrect./,structural./,protein./,production,./,and./,the./,fail
ure./,of./,normal./,anatomical./,development.
4../,Which./,clinical./,example./,best./,illustrates./,how./,a./,factor./,disrupts./,homeo
stasis./,and./,impacts./,patient./,wellbeing?
A../,Intracellular./,glucose./,preservation./,leading./,to./,increased./,systemic./,ene
rgy./,reserves.
B../,Severe./,fluid./,and./,electrolyte./,shifts./,causing./,severe./,nausea,./,vomiting,./,
or./,lethal./,cardiac./,dysrhythmias.
C../,Balanced./,physical./,exercise./,increasing./,respiratory./,efficiency.
D../,Mild./,shivering./,conserving./,core./,body./,temperature./,during./,standard./,
winter./,conditions.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Homeostasis./,represents./,the./,dynamic./,equilibrium./,of./,t
he./,internal./,environment../,When./,homeostatic./,mechanisms./,fail,./,factors./,li
ke./,fluid./,and./,electrolyte./,shifts./,disrupt./,electrical./,potentials./,across./,memb
ranes../,This./,can./,trigger./,manifestations./,such./,as./,gastrointestinal./,distress./,(
nausea./,and./,vomiting)./,or./,dangerous./,cardiac./,conduction./,changes./,(dysrh
ythmias)../,The./,other./,choices./,describe./,normal./,physiological./,adjustments.
/,or./,healthy./,states.
, 5../,Which./,statement./,accurately./,outlines./,the./,dynamic./,physiological./,step
s./,of./,the./,renin-angiotensin-
aldosterone./,system./,(RAAS)./,when./,blood./,pressure./,drops?
A../,Kidneys./,release./,aldosterone,./,which./,stimulates./,angiotensin./,I./,convers
ion./,in./,the./,liver.
B../,Reduced./,blood./,flow./,causes./,the./,kidneys./,to./,release./,renin,./,producing./,
angiotensin./,I,./,which./,converts./,to./,angiotensin./,II,./,leading./,to./,vasoconstric
tion./,and./,aldosterone./,release./,to./,conserve./,sodium./,and./,water.
C../,Angiotensin./,II./,directly./,breaks./,down./,renin./,to./,allow./,water./,loss./,in./,th
e./,urine.
D../,The./,lungs./,release./,renin./,to./,cause./,widespread./,vasodilation./,and./,drop./,
blood./,pressure.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,The./,RAAS./,is./,a./,core./,hormone./,system./,regulating./,syst
emic./,blood./,pressure../,Reduced./,renal./,blood./,flow./,stimulates./,the./,juxtaglo
merular./,cells./,to./,secrete./,renin../,Renin./,cleaves./,angiotensinogen./,into./,angi
otensin./,I,./,which./,is./,then./,converted./,into./,angiotensin./,II./,by./,Angiotensin-
Converting./,Enzyme./,(ACE)./,in./,the./,lungs../,Angiotensin./,II./,induces./,potent.
/,vasoconstriction./,and./,triggers./,the./,adrenal./,cortex./,to./,release./,aldosterone..
/,Aldosterone./,promotes./,sodium./,and./,water./,retention./,in./,the./,kidneys,./,incr
easing./,blood./,volume./,and./,raising./,blood./,pressure.
6../,Which./,laboratory./,values./,align./,with./,the./,dynamic./,metabolic./,state./,of./,
a./,patient./,in./,severe./,diabetic./,ketoacidosis./,(DKA)?
A../,Decreased./,anion./,gap./,and./,significantly./,elevated./,serum./,bicarbonate./,(
HCO₃⁻).
Course./,Code:./,D236
Course./,Name:./,Pathophysiology
Topic:./,Ultimate./,Advanced./,Practice./,Study./,Bank
Academic./,Year:./,2026/2027
1../,Which./,biological./,sequence./,correctly./,highlights./,how./,the./,human./,imm
une./,system./,responds./,to./,an./,infection?
A../,B./,cells./,produce./,cytokines,./,which./,directly./,mutate./,viral./,protein./,frag
ments.
B../,T./,cells./,produce./,cytokines,./,which./,stimulate./,B./,cells./,to./,differentiate./,a
nd./,produce./,antibodies.
C../,Cytokines./,directly./,neutralize./,foreign./,bacteria,./,bypassing./,B./,and./,T./,ly
mphocytes.
D../,Erythrocytes./,release./,histamines./,to./,stimulate./,helper./,T./,cells.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,When./,the./,body./,encounters./,a./,pathogen,./,antigen-
presenting./,cells./,activate./,T./,cells./,(specifically./,Helper./,T./,cells/CD4+)../,Th
ese./,T./,cells./,secrete./,signaling./,molecules./,called./,cytokines,./,which./,signal./,
and./,stimulate./,B./,cells./,to./,proliferate./,and./,differentiate./,into./,plasma./,cells,./,
which./,subsequently./,produce./,targeted./,antibodies../,Cytokines./,themselves./
,do./,not./,directly./,neutralize./,pathogens./,or./,mutate./,proteins,./,nor./,do./,erythro
,
cytes./,release./,histamines.
2../,What./,is./,the./,fundamental./,role./,of./,cellular./,DNA./,changes./,in./,congenita
l./,abnormalities?
A../,They./,induce./,transient./,physiological./,changes./,without./,altering./,cellula
r./,transcription.
B../,They./,cause./,persistent./,mutations./,in./,genes./,or./,structural./,chromosomal.
/,abnormalities./,that./,disrupt./,embryogenesis.
C../,They./,selectively./,accelerate./,mitochondrial./,replication./,during./,the./,thir
d./,trimester.
D../,They./,prevent./,environmental./,teratogens./,from./,crossing./,the./,placental./,
barrier.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Congenital./,abnormalities./,arise./,from./,altered./,genetic./,
blueprints./,during./,fertilization./,or./,early./,fetal./,development../,These./,DNA./,
changes./,introduce./,inherited./,or./,de./,novo./,mutations./,in./,genes./,or./,structura
l/numerical./,chromosomal./,abnormalities./,(such./,as./,trisomies./,or./,deletions
),./,leading./,to./,malformed./,or./,nonfunctional./,proteins./,that./,disrupt./,normal./,
organogenesis./,and./,tissue./,development../,They./,do./,not./,prevent./,teratogeni
c./,damage./,or./,limit./,themselves./,to./,transient./,changes.
3../,How./,do./,direct./,alterations./,of./,DNA./,during./,fetal./,development./,disrupt./,
physiological./,structures?
A../,By./,reducing./,cell./,membrane./,cholesterol./,content.
B../,By./,rewriting./,structural./,or./,regulatory./,codes,./,resulting./,in./,congenital./,
abnormalities.
,C../,By./,entirely./,eliminating./,protein./,translation./,within./,target./,tissues.
D../,By./,converting./,somatic./,epithelial./,tissue./,into./,active./,germline./,cells.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Congenital./,malformations./,are./,driven./,at./,a./,molecular./,
level./,by./,alterations./,of./,DNA../,When./,the./,genetic./,code./,is./,altered./,by./,muta
gens,./,replication./,errors,./,or./,errors./,in./,chromosomal./,segregation,./,the./,tran
scriptional./,blueprint./,is./,permanently./,rewritten../,This./,leads./,to./,defective./,s
ignaling./,pathways,./,incorrect./,structural./,protein./,production,./,and./,the./,fail
ure./,of./,normal./,anatomical./,development.
4../,Which./,clinical./,example./,best./,illustrates./,how./,a./,factor./,disrupts./,homeo
stasis./,and./,impacts./,patient./,wellbeing?
A../,Intracellular./,glucose./,preservation./,leading./,to./,increased./,systemic./,ene
rgy./,reserves.
B../,Severe./,fluid./,and./,electrolyte./,shifts./,causing./,severe./,nausea,./,vomiting,./,
or./,lethal./,cardiac./,dysrhythmias.
C../,Balanced./,physical./,exercise./,increasing./,respiratory./,efficiency.
D../,Mild./,shivering./,conserving./,core./,body./,temperature./,during./,standard./,
winter./,conditions.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,Homeostasis./,represents./,the./,dynamic./,equilibrium./,of./,t
he./,internal./,environment../,When./,homeostatic./,mechanisms./,fail,./,factors./,li
ke./,fluid./,and./,electrolyte./,shifts./,disrupt./,electrical./,potentials./,across./,memb
ranes../,This./,can./,trigger./,manifestations./,such./,as./,gastrointestinal./,distress./,(
nausea./,and./,vomiting)./,or./,dangerous./,cardiac./,conduction./,changes./,(dysrh
ythmias)../,The./,other./,choices./,describe./,normal./,physiological./,adjustments.
/,or./,healthy./,states.
, 5../,Which./,statement./,accurately./,outlines./,the./,dynamic./,physiological./,step
s./,of./,the./,renin-angiotensin-
aldosterone./,system./,(RAAS)./,when./,blood./,pressure./,drops?
A../,Kidneys./,release./,aldosterone,./,which./,stimulates./,angiotensin./,I./,convers
ion./,in./,the./,liver.
B../,Reduced./,blood./,flow./,causes./,the./,kidneys./,to./,release./,renin,./,producing./,
angiotensin./,I,./,which./,converts./,to./,angiotensin./,II,./,leading./,to./,vasoconstric
tion./,and./,aldosterone./,release./,to./,conserve./,sodium./,and./,water.
C../,Angiotensin./,II./,directly./,breaks./,down./,renin./,to./,allow./,water./,loss./,in./,th
e./,urine.
D../,The./,lungs./,release./,renin./,to./,cause./,widespread./,vasodilation./,and./,drop./,
blood./,pressure.
�./,CORRECT./,ANSWER:./,B
�./,RATIONALE:./,The./,RAAS./,is./,a./,core./,hormone./,system./,regulating./,syst
emic./,blood./,pressure../,Reduced./,renal./,blood./,flow./,stimulates./,the./,juxtaglo
merular./,cells./,to./,secrete./,renin../,Renin./,cleaves./,angiotensinogen./,into./,angi
otensin./,I,./,which./,is./,then./,converted./,into./,angiotensin./,II./,by./,Angiotensin-
Converting./,Enzyme./,(ACE)./,in./,the./,lungs../,Angiotensin./,II./,induces./,potent.
/,vasoconstriction./,and./,triggers./,the./,adrenal./,cortex./,to./,release./,aldosterone..
/,Aldosterone./,promotes./,sodium./,and./,water./,retention./,in./,the./,kidneys,./,incr
easing./,blood./,volume./,and./,raising./,blood./,pressure.
6../,Which./,laboratory./,values./,align./,with./,the./,dynamic./,metabolic./,state./,of./,
a./,patient./,in./,severe./,diabetic./,ketoacidosis./,(DKA)?
A../,Decreased./,anion./,gap./,and./,significantly./,elevated./,serum./,bicarbonate./,(
HCO₃⁻).
