Exercise Physiology quiz 2 lesson 6 objectives
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- 1. Describe the anatomy of the heart in terms of the chambers, the 2 nodes, and understand the functions of the heart.
- 4 chambers,SA and AV nodes. Regulate Temp, PH, Fluid level, Blood to lungs, organs, tissues (O2 to tissues), CO2 and waste from tissues, Deliver hormones
- 2. What path does blood flow take through the heart/lungs/capillaries?
- Blood to lungs,back to heart, out to organs, tissues, back to heart.
- 3. What do the following terms represent? (Define)
- (see next 6 cards)
- Define: Q
- Cardiac output (Q= SV X HR)
- Define: HR
- Heart rate (BPM)
- Define: SV
- Stroke Volume. Volume of blood in mL pumped out of left ventricle.SV=EDV-ESV(Approx 70mL depending on individual size)
- Define: EDV
- End Diastolic Volume
- Define: ESV
- End Systolic Volume
- Define: EF %
- Ejection Fraction % of blood pumped out of left ventricle on each beat. SB>55%
- 4. How do you calculate Cardiac Output? (* test question)
- Q = SV X HR
- 5. Understand and be able to apply the Karvonen Heart rate formula? (Define Karvonen formula)
- The Karvonen formula is maximum heart rate - resting heart rate x desired intensity + resting heart rate. [ (220-age)-RHR ] x (% both exercise intensity ranges) + (RHR to each range)
- 6. What happens to heart rate and stroke volume during exercise (as intensity increases)?
- Increase, SV levels off and can decrease slightly, HR linear increase
- 7. What influence does endurance training have on Q, HRmax, resting heart rate (RHR), and SV?
- (See next 4 cards)
- Endurance training on: Q
- Improves (increases)
- Endurance training on: HRmax
- Not much change
- Endurance training on: resting heart rate (RHR)
- Improves (Lower)
- Endurance training on: SV
- Improves
- 8. What effect does an elevated SV have on EDV or vice versa?
- Direct relationship SV^, then EDV^
- 9. What is the blood pressure (BP) response during exercise?
- Increases (Mostly systolic) Diastolic can decrease slightly.
- 10. What does the A-VO2 difference represent?
- The difference in O2 content from arteries to veins. (How effective is O2 uptake).
- 11. What effect does an increase in sympathetic stimulation have on the heart?
- Increase (stimulate)
- 12. What effect would a drug classified as a “Beta-blocker†have on the heart?
- Relaxing or dilation effect. Beta receptor (Heart) action would be blocked. Block catacholomines..