BIOS 255 Exam 1 | Anatomy and
Physiology Exam 1 Study Guide |
Latest 2024
What happens during atrial diastole/ ventricular systole?
AV valves closed, semilunar valves open
How are pressure and volume related?
inversely related
What happens to pressure when volume goes up?
pressure goes down
What happens when to volume when pressure goes up?
volume goes down
How long does a cardiac cycle last?
From one p wave to the beginning of the next p wave
What is the name of the process of listening to sounds made by
the body?
Auscultation
What is the "lub-dub" sound the result of?
,The closing of heart valves
What is the "lub" sound caused by?
The closure of the atrioventricular (AV) valves during ventricular
contraction
What is the "dub" sound caused by?
The closure of the aortic and pulmonary semilunar valves
during ventricular relaxation
What is ventricular contraction called?
systole
What is ventricular relaxation called?
diastole
What is the equation for cardiac output?
cardiac output = stroke volume x heart rate
What is the equation for stroke volume?
stroke volume = end diastolic volume (EDV) - end systolic
volume (ESV)
What is stroke volume?
Amount of blood leaving the left ventricle per beat
, What affects cardiac output?
heart rate and stroke volume
What pathway does deoxygenated blood travel?
From organs; superior vena cave, inferior vena cava, and
coronary sinus; right atrium; right AV valve; right ventricle;
pulmonary valve; pulmonary trunk; pulmonary arteries; lungs
What pathway does oxygenated blood travel?
From lungs; pulmonary veins; left atrium; left AV valve; left
ventricle; aortic valve; aorta; organs of the body
How many cardiac center are in the medulla oblongata of the
brain stem?
Two
How does the cardioaccelerator center send sympathetic
signals?
Cardiac nerves
What do cardiac nerves do?
increase heart rate and force of contractility
How does the cardioinhibitory center send parasympathetic
signals?
Vagus nerves
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