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Rapid and dangerously uncoordinated ventricular contractions are called?
Rapid and dangerously uncoordinated ventricular contractions is called ventricular fibrillation, or v-fib. During v-fib, the ventricle is not pumping blood to the body, and thus v-fib is known as a lethal dysrhythmia.
The peak blood pressure measured during ventricular systole is called?
Systolic Pressure
How many ventricular contractions per minute does the human heart have?
The human heart typically has a resting rate of 60 to 100 ventricular contractions per minute, which corresponds to a heart rate of 60 to 100 beats per minute. This rate can vary based on factors such as age, fitness level, and overall health. During physical activity or stress, the heart rate can increase, resulting in more ventricular contractions.
What is the lowest pressure that remains in the arterial system during ventricular relaxation?
this is called the diastolic pressure meaning when the heart is in diastole. The diastolic number is the bottom number in common blood pressure. i.e. in a pressure 120/80 the lowest measured pressure is 80mmHg during ventricular relaxation
Why are the internal walls of the ventricles not smooth?
The internal walls of the ventricles are not smooth due to the presence of structures called trabeculae carneae, which are irregular muscular ridges. These projections increase the surface area of the ventricular walls and contribute to the efficiency of heart contractions. Additionally, the rough texture helps prevent the adhesion of the heart valves to the ventricular walls during systole, ensuring proper function during the cardiac cycle.
The heart sounds lub and dup occur when the atria contract and subsequently when the ventricles contract.?
The heart sounds "lub" and "dup" correspond to the closure of heart valves during the cardiac cycle, not directly to atrial and ventricular contractions. The "lub" (S1 sound) occurs when the atrioventricular (AV) valves close at the start of ventricular contraction (systole), while the "dup" (S2 sound) occurs when the semilunar valves close at the end of ventricular contraction. Therefore, these sounds represent the heart's valve function rather than the contractions themselves.
Does ventricular pressure increase the fastest during ventricular filling?
yes
The maximum pressure achieved during ventricular contraction is called what?
The maximum pressure achieved during ventricular contraction is called systolic blood pressure. It represents the force exerted by the blood against the walls of the arteries when the heart beats.
The greatest force of the blood against the walls of the arteries during ventricular contraction is called?
That is the Systolic Pressure.
During ventricular systole is ventricular pressure increasing or decreasing?
increasing! :D
During ventricular systole are AV valves closed?
yes during ventricular systole AV valves are closed.
Which two valves are open during ventricular systole and closed during ventricular diastole?
The semi-lunar valves
