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The first heart sound or "lub" results from closure of the tricuspid and mitral valves. It is a rather low-pitched and a relatively long sound which, as indicated in, represents the beginning of ventricular systole. The second heart sound, or "dub," marks the beginning of ventricular diastole. It is produced by closure of the aortic and pulmonary (pulmonic) semilunar vanes when the intraventricular pressure begins to fall
What else can I help you with?
What do the bands in gel electrophoresis represent?
The bands in gel electrophoresis represent different sizes of DNA fragments.
What symbols do scientists use represent dominant and recessive genes?
Scientists use uppercase letters to represent dominant genes and lowercase letters to represent recessive genes. For example, "R" might represent a dominant gene for round seeds, while "r" might represent a recessive gene for wrinkled seeds.
What do the multiple bands in gel electrophoresis represent?
The multiple bands in gel electrophoresis represent different sizes of DNA fragments.
How ear defenders effect pitch and amplitude of sound?
Ear defenders reduce the intensity of sound reaching the ears, which decreases the amplitude of the sound. However, they do not affect the pitch of the sound, as the frequency of the sound wave remains the same.
What do T waves on an ECG represent?
T waves on an ECG represent the repolarization of the ventricles of the heart, indicating the relaxation phase of the heart's electrical activity.
What is the LUBDUB sound we hear when listening to the heart?
The "LUB" sound is created by the closing of the mitral and tricuspid valves during systole as blood is pumped out of the ventricles. The "DUB" sound is caused by the closing of the aortic and pulmonary valves during diastole as the ventricles relax and fill with blood. Together, these sounds represent the normal functioning of the heart's valves during the cardiac cycle.
What is the Lub-Dub sound?
In the lub-dub version of heart sound, dub is caused by the back rush of blood against a closed aortic or pulmonary valve.
What does Highness or lowness of a sound represent?
Volume
How do I Type a kiss sound?
To type a kiss sound, you can use "muah" or "mwah" to represent the sound of a kiss.
What is the use of words that imitate the sound they represent called?
Onomatopoeia.
Where 2 letters represent a single sound what is that called?
Dipthong
Is 'w' a vowel or a consonant sound?
The letter 'w' can represent both a vowel sound (as in "cow" or "now") and a consonant sound (as in "well" or "window").
What is the pH sound?
The "ph" sound is a digraph, which is a combination of two letters that represent a single sound. In words like "phone" or "photo," the "ph" sound is pronounced as an "f."
Why does it make a wooshing sound when you run through trees on acww ds?
It makes the sound to represent leaves rustling!
What sound does C represent in this word center?
In the word "center," the letter C represents the sound /s/.
What are the electric squiggles that represent the relationship between the sound made or spoken then heard?
The electric squiggles represent sound waves in the form of an audio waveform. When a sound is made or spoken, it creates vibrations that are converted into electrical signals by a microphone. These signals are then visually displayed as squiggly lines on a screen, representing the sound's amplitude and frequency.
What is two letters used to represent one sound?
That's a "diphthong".
