During first cleavage, the metaphase plate is closer to the posterior, & fertilized egg is divided into two cells:

one having the anterior PARs (PAR-6 and PAR-3)

one having the posterior PARs (PAR-2 and PAR-1)

TLS Online TPP Program

#Id: 5683

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 5684

#Unit 7. System Physiology – Animal

There are neural connections between the hypothalamus & posterior pituitary & vascular connections between the hypothalamus & anterior pituitary

TLS Online TPP Program

#Id: 5685

#Unit 7. System Physiology – Animal

The posterior lobe hormones are nanopeptides with a disulfide ring at one end

TLS Online TPP Program

#Id: 5686

#Unit 7. System Physiology – Animal

The hormones secreted by the posterior pituitary gland (neurohypophysis) are arginine vasopressin (AVP) and oxytocin

TLS Online TPP Program

#Id: 5687

#Unit 7. System Physiology – Animal

Arginine in the vasopressin molecule is replaced by lysine to form lysine vasopressin 

TLS Online TPP Program

#Id: 5688

#Unit 7. System Physiology – Animal

Oxytocin and vasopressin are typical neural hormones, that is, hormones secreted into the circulation by nerve cells