Quiz 1 Stuff Flashcards
True of False
The main purpose of the heart valves is to filter the blood for harmful or unknown substances.
False
Describe the direction of blood flow through the cardiovascular system: start with peripheral veins
1) peripheral veins
2) right atrium
3) right ventricle
4) lungs
5) left atrium
6) left ventricle
7) peripheral arteries
Does the heart spend more time in diastole or systole per cardiac cycle?
Diastole
Is systole defined as a period of ventricular contraction or relaxation?
Contraction
True or False
The heart sounds (lub, dub) are due to the closing of the valves.
True
What is cardiac output at rest?
5 L/min
Will an increase in activation of the sympathetic nervous system raise or lower the heart rate?
Raise
End-diastolic volume minus end-systolic volume equals what?
Stroke volume
True/ False
The rate of blood flow through most tissues results from the tissues need for nutrients.
True
Which vessel is under the highest pressure?
Arteries
Which vessel contains the most blood volume but is under the lowest pressure?
Veins
Mr. Smith is under a lot of stress and has experienced an increase in his blood pressure at rest. His vascular resistance has not changed. What will happen to his cardiac output? (F=/\P/R)
Increase
True or False
The diaphragm is a primary and actively used muscle during resting inspiration.
True
True or False
Expiration during rest is a passive process but becomes active during exercise.
True
True or False
Gas exchange in the lunge occurs between the alveolar sacs and pulmonary capillaries.
True
What is partial pressure?
Pressure exerted by a specific gas
V/Q mismatch is most likely equal to 1 (even distribution of air and blood) in what part of the lung when standing?
Middle
True or False
O2 is transported in the blood in the form of bicarbonate.
False
Which factor controls ventilation under normal conditions? PO2 or PCO2?
PCO2
Amount of air entering and leaving the lungs with each breath?
Tidal volume
Greatest amount of air that can be expired after a maximal inspiration.
Vital Capacity
Amount of air remaining in the lungs after a maximal expiration.
Residual volume
Sum of vital capacity and residual volume.
Total lung capacity
Is someone had cold induced asthma during exercise, would you encourage them to inhale through their nose or mouth while exercising?
Nose
