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Physiology Lab Quiz 3 > ECG > Flashcards

ECG Flashcards

1
Q

How does the autonomic nervous system affect heart rate?

A

it regulates cardiac rate at the SA node

Sympathetic: increase HR
Parasympathetic: decrease HR

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2
Q

What is an ECG?

A

recording of electrical activity of the heart

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3
Q

P wave

A

atrial depolarization and contraction of both atria

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4
Q

QRS

A

ventricular depolarization and contraction of both ventricles

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5
Q

T wave

A

results in ventricular relaxation

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6
Q

How does exercise affect the heart?

A

increases tissue waste and oxygen demand by skeletal muscle….

  1. blood supply to tissues increase
  2. heart pumps faster, BPM increase
    - systole decrease
    - diastole decrease
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Physiology Lab Quiz 3 (5 decks)

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