ECG Lab Flashcards Preview

Biology Unit 3- Systems of living things > ECG Lab > Flashcards

Flashcards in ECG Lab Deck (9)
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1
Q

exercise?

A

exercise: exercise increases heart rate

exercise to rest: heart rate goes down but not to resting value

2
Q

PR wave

A

PR: not much change. Depolarization of atria. this can’t change as then the ventricles and atria contracting at the same time which can’t happen

3
Q

TP wave

A

TP
- time interval must shorten to fit in more beats to supply more oxygen to body
TP: diastole of all chambers.

4
Q

Why does it happen

A
  • using more muscles so you use more oxygen and glucose for energy through cellular respiration
  • removal of waste means that body must still pump oxygen to muscles so heart rate is still high but not as high
5
Q

PR wave

A

depolarization of atria

6
Q

QRS

A

depolarization of ventricles (repolarization of atria happens at the same time)

7
Q

T wave

A

repolarization of ventricles

8
Q

systole and diastole

A

PQ is atrial systole (flat part between p and q)

RT: ventricular systole

everywhere there is not systole. there is diastole.

9
Q

AV Node special ability

A

AV node holds the signal for a bit to allow atria to finish contracting before ventricles.