The vast amount of breakdown of his tooth enamel and the black discoloration, I suspect tartar and tooth decay may be the primary cause of this deterioration
<h3>Tartar</h3>
A dentist will have to remove the build-up when tartar is the cause, typically by scraping the tartar off the teeth. The dentist may have to use ultrasonic instruments that use vibration to break up the tartar and make it easier to remove.
<h3>Tooth decay</h3>
In cases of decay, it's unlikely that a dentist will be able to improve the black teeth through a simple cleaning. they're going to instead need to remove the decayed portion of the tooth.
To learn more about Tooth decay.
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Answer:
c. cerebrospinal fluid
Explanation:
Cerebrospinal fluid
This fluid is a colorless , clear body fluid , that is present in the brain and the spinal cord .
Some specialized ependymal cells produces this fluid .
Around 125 mL of Cerebrospinal fluid is produced at one time , and around 500mL is produced daily .
The Cerebrospinal fluid is nearly 99% water which means it contain highest volume of fluid .
The autonomic nervous system is divided into three parts: the sympathetic nervous system, the parasympathetic nervous system and the enteric nervous system. The autonomic nervous system controls smooth muscle of the viscera (internal organs) and glands.
Answer:
The correct answer will be option-A
Explanation:
Electrocardiogram or ECG is the recording and representation of the electrical changes that are taking place during the cardiac cycle.
The QRS complex is preceded by the P wave or atrial systole or atrial depolarization after which the electrical signals are passed on to the AV node.
As soon as the AV node passes the electrical signals to bundle of His, it is observed in as the QRS interval which represents the atrial diastole and the onset of ventricular depolarization.
Thus, option-true is the correct answer.
