BIOS255/l BIOSl 255l Examl 1:l Anatomyl
andl Physiologyl IIIl Reviewl (Latestl 2025/l
2026l Update)l |l Qsl &l As|l Gradel A|l
100%l Correctl (Verifiedl Answers)-l
Chamberlain
QUESTION
bundlel ofl His
Answer:
carriesl signall awayl froml thel AVl node,l forksl sintol rightl andl leftl bundlel
branches
QUESTION
purkinjel fibers
Answer:
spreadl signall throughl ventricles
QUESTION
Ifl SAl nodel fails...
Answer:
AVl willl takel over
,QUESTION
semilunarl valves
Answer:
controll flowl froml ventriclesl intol greatl arteries
QUESTION
pulmonaryl valve
Answer:
openingl betweenl rightl ventriclel andl pulmonaryl trunk
QUESTION
aorticl semilunarl valve
Answer:
inl openingl betweenl leftl ventriclel andl aorta
QUESTION
SAl node
Answer:
pacemakerl inl rightl atrium,l initiatesl heartbeat
, QUESTION
AVl node
Answer:
nearl thel rightl AVl valvel atl lowerl endl ofl septum,l spreadsl signall tol thel
ventricles
QUESTION
phasel 0
Answer:
Depolarization.l Na+l rapidlyl entersl cell.l Chargel getsl morel +.l Happensl veryl
fast.
QUESTION
phasel 1
Answer:
cellsl startl tol repolarizel butl onlyl forl al briefl period
QUESTION
phasel 2
Answer:
andl Physiologyl IIIl Reviewl (Latestl 2025/l
2026l Update)l |l Qsl &l As|l Gradel A|l
100%l Correctl (Verifiedl Answers)-l
Chamberlain
QUESTION
bundlel ofl His
Answer:
carriesl signall awayl froml thel AVl node,l forksl sintol rightl andl leftl bundlel
branches
QUESTION
purkinjel fibers
Answer:
spreadl signall throughl ventricles
QUESTION
Ifl SAl nodel fails...
Answer:
AVl willl takel over
,QUESTION
semilunarl valves
Answer:
controll flowl froml ventriclesl intol greatl arteries
QUESTION
pulmonaryl valve
Answer:
openingl betweenl rightl ventriclel andl pulmonaryl trunk
QUESTION
aorticl semilunarl valve
Answer:
inl openingl betweenl leftl ventriclel andl aorta
QUESTION
SAl node
Answer:
pacemakerl inl rightl atrium,l initiatesl heartbeat
, QUESTION
AVl node
Answer:
nearl thel rightl AVl valvel atl lowerl endl ofl septum,l spreadsl signall tol thel
ventricles
QUESTION
phasel 0
Answer:
Depolarization.l Na+l rapidlyl entersl cell.l Chargel getsl morel +.l Happensl veryl
fast.
QUESTION
phasel 1
Answer:
cellsl startl tol repolarizel butl onlyl forl al briefl period
QUESTION
phasel 2
Answer: