A&P II Lecture review Circulatory System (Part 4)

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1

Define cardiodynamics.

The movement and force generated by cardiac contractions

2

Define ejection fraction.

The % of EDV represented by stroke volume

3

What is the formula for stroke volume (SV)?

SV=EDV - ESV

4

Define cardiac output.

The volume pumped by the left ventricle in one minute

5

What is the formula for Cardiac output?

CO = HR x SV

6

What factors affect cardiac output?

Heart rate

Stroke volume

7

Your heart rate is adjusted by what?

Autonomic nervous system

hormones

8

Stroke volume is adjusted by what?

EDV

ESV

9

When sympathetic and parasympathetic fibers from the medulla oblongata(cardiac centers) affect heart rate it is known as what?

Autonomic innervation

10

What effect do sympathetic neurons have on heart rate?

It increases it

11

What effect do parasympathetic neurons have on heart rate?

Slows it

12

Blood pressure is monitored using what?

Baroreceptors

13

Arterial oxygen and carbon dioxide levels are monitored using what?

Chemoreceptors