BIOS255/ BIOS 255 Exam 1: Anatomy and Physiology III Review (Latest 2025/ 2026 Update) | Qs & As| Grade A| 100% Correct (Verified Answers)- Chamberlain

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: