Anatomy Lab Exam -2 Questions And Answers Latest 2025.docx

Anatomy Lab Exam #2 Questions And
Answers Latest 2025
Cycle of a cardiac muscle -
correct answer ✅1) - threshold = open Na+ channels --->
depolarization
2) close the Na+ channels ----> repolarization open L-type at
channels --> Plateau
3) L-type Ca+ channels close ---> finish repolarization
4) return to normal permeablitlity
5) hyperolarization


contraction starts at -
correct answer ✅plateau & ends at when it return to normal
permeability


you cannot have a wave summation occur when -
correct answer ✅you are in absolute refactory


EKG -
correct answer ✅measures the total electrical impulses given off
by all of the cardiac muscle cells in the heart

,Anatomy Lab Exam #2 Questions And
Answers Latest 2025
When labelling an ECG -
correct answer ✅- P = atrial depolarization (atrial systole)
- QRS = ventricular depolarization & atria repolarization
- T = ventricular repolarization


depolarizartion -
correct answer ✅systole


repolarization -
correct answer ✅diastole


When does passive filling occur -
correct answer ✅- during diastasis which is a slow trical
- after T before the next P in a cardiac cycle


Cardiac volumes -
correct answer ✅EDV
ESV
SV
CO

, Anatomy Lab Exam #2 Questions And
Answers Latest 2025

EDV -
correct answer ✅- end diastolic volume
- how much blood you filled the ventricle with


ESV -
correct answer ✅- end systolic volume
- how much blood is left over after ventricle ejects blood


SV -
correct answer ✅- Stroke volume
- how much blood the ventricles ejected


CO -
correct answer ✅-Cardiac output
- how much blood ventricles pump each min.
- SV x Heart rate


Pacemaker cell cycle -
correct answer ✅1) prepotential = spontaneous depolarization