Polyglutamylation and polyglycylation are likely mutually exclusive, so they would not normally occur at the same time & both can enhance microtubule stability,

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#Id: 5312

#Unit 7. System Physiology – Animal

During Isovolumetric Ventricular Contraction QRS waves appear as a result of electrical depolarization of the ventricles

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#Id: 5313

#Unit 7. System Physiology – Animal

Rapid Ventricular Ejection When ventricular pressure becomes greater than aortic pressure, the aortic valve opens (left heart).

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#Id: 5314

#Unit 7. System Physiology – Animal

Rapid Ventricular Ejection

Blood is rapidly ejected from the left ventricle into the aorta through aortic valve, driven by the pressure gradient between the left ventricle and the aorta.

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#Id: 5315

#Unit 7. System Physiology – Animal

Rapid Ventricular Ejection

atrial filling begins 

left atrial pressure slowly increases as blood is returned to the left heart from the pulmonary circulation.

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#Id: 5316

#Unit 7. System Physiology – Animal

Rapid Ventricular Ejection

end of this phase coincides with the end of the ST segment (or the beginning of the T wave) on the ECG and with the end of ventricular contraction.

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#Id: 5317

#Unit 7. System Physiology – Animal