Degradation of bacterial mRNAs is initiated by removal of a pyrophosphate from the 5’ terminus. The monophosphorylated form stimulates the catalytic activity of an endonuclease RNase E

TLS Online TPP Program

#Id: 6520

#Unit 7. System Physiology – Animal

In 21β-hydroxylase deficiency, glucocorticoid secretion is reduced during fetal life and the adrenal medulla is dysplastic

TLS Online TPP Program

#Id: 6521

#Unit 7. System Physiology – Animal

Reuptake of Norepinephrine via aNET (norepinephrine transporter) is a major mechanism to terminate the actions of norepinephrine.

TLS Online TPP Program

#Id: 6522

#Unit 7. System Physiology – Animal

Epinephrine and norepinephrine are metabolized to biologically inactive products by oxidation & methylation catalyzed by monoamine oxidase and catechol -O- methyltransferase respectively

TLS Online TPP Program

#Id: 6523

#Unit 7. System Physiology – Animal

Epinephrine and norepinephrine both act on α-and β-adrenergic receptors (adrenoceptors)

TLS Online TPP Program

#Id: 6524

#Unit 7. System Physiology – Animal

Five dopamine receptors fall into two major categories: D1 -like (D1 and D5 )  D2 -like (D2 , D3 , and D4 )

TLS Online TPP Program

#Id: 6525

#Unit 7. System Physiology – Animal

Norepinephrine produces vasoconstriction via  α1 receptors, but epinephrine dilates the blood vessels in skeletal muscle and liver via β2 receptors