Auxin-induced proton extrusion acidifies the cell wall and increases cell extension Auxin increase the rate of proton extrusion (wall acidification), and the kinetics of proton extrusion should closely match those of auxin-induced growth.

TLS Online TPP Program

#Id: 1270

#Unit 7. System Physiology – Animal

Negative feedback is exerted by cortisol in the hypothalamic-pituitary axis.

TLS Online TPP Program

#Id: 1271

#Unit 7. System Physiology – Animal

The zona glomerulosa is controlled via; Renin-angiotensin-aldosterone system. 

TLS Online TPP Program

#Id: 1272

#Unit 7. System Physiology – Animal

Aldosterone has three actions on the late distal tubule and collecting ducts of the kidney: 

Increases Na+ reabsorption

Increases K+ secretion

Increases H+ secretion

TLS Online TPP Program

#Id: 1273

#Unit 7. System Physiology – Animal

ACTH stimulates the synthesis and secretion of cortisol by the activation of adenylyl cyclase via Gs.

TLS Online TPP Program

#Id: 1274

#Unit 7. System Physiology – Animal

Angiotensin II stimulates the synthesis and secretion of aldosterone by the activation of phospholipase C via Gq. 

TLS Online TPP Program

#Id: 1275

#Unit 7. System Physiology – Animal

Important effect of cortisol, Decrease translocation of GLUT4 to the cell membrane.