Chapter 8 - CV Responses to Acute Exercise Flashcards
1
Q
Resting Heart Rate
- untrained
- trained
A
- 60-80bpm
- 30-40bpm
2
Q
HRmax equation
A
HRmax = 220-age
3
Q
Four factors affecting SV during exercise
A
- preload
- ventricular distensibility
- ventricular contractility
- afterload
4
Q
Cardiac Output equation
A
Q^. = HR x SV
5
Q
Q^. normal values
A
- Resting: 5 L/min
- Untrained: 20 L/min
- Trained: 40 L/min
6
Q
True/false: Diastolic BP increases during exercise
A
False (only systolic BP increases)
7
Q
3 reasons SV drifts downwards during prolonged exercise
A
- Skin blood flow increases
- Plasma volume decreases
- Venous return decreases
8
Q
Name of blood flow associated with digestion
A
Splanchnic
9
Q
Fick equation
A
VO2 = Q x (a-v)O2diff
10
Q
(a-v)O2diff values
- resting
- exercising
A
- 6 mL/100 mL blood
- 15-17 mL/100 mL blood
11
Q
% reduction in plasma volume with prolonged exercise
A
10-15
12
Q
True/false: Hematocrit decreases during exercise
A
False (hemoconcentration occurs)
13
Q
HR increases within ____ onset of exercise
A
1 second
14
Q
True/false: Ventilation matches metabolic rate during exercise
A
True
15
Q
Minute ventilation (VE)
- resting
- exercising
A
- 6-10 L/min
- 60-150 L/min
