There are two de novo methyltransferases (Dnmt3A and Dnmt3B) in the mouse; they have different target sites, and both are essential for development.

TLS Online TPP Program

#Id: 4491

#Unit 13. Methods in Biology

QT interval includes the QRS complex, the ST segment, and the T wave.

TLS Online TPP Program

#Id: 4492

#Unit 13. Methods in Biology

ST segment - plateau portion of the ventricular action potential.

TLS Online TPP Program

#Id: 4493

#Unit 13. Methods in Biology

The U wave is an inconstant finding that may be due to ventricular myocytes with long action potentials.

TLS Online TPP Program

#Id: 4494

#Unit 13. Methods in Biology

Heart rate is measured by counting the number of QRS complexes or R waves because they are most prominent per minute.

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#Id: 4495

#Unit 13. Methods in Biology

Electrical connections between the patient’s limbs and the electrocardiograph for recording ECGs from the standard bipolar limb leads.

TLS Online TPP Program

#Id: 4496

#Unit 13. Methods in Biology

In recording limb lead I, the negative terminal of the electrocardiograph is connected to the right arm and the positive terminal is connected to the left arm