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
