ADH has two actions, one on the kidney and the other on vascular smooth muscle, these actions are mediated by different receptors, different intracellular mechanisms, and different secondary messengers.

a. The major action of ADH is to increase the water permeability of principal cells in the late distal tubule and collecting duct.

b. The receptor for ADH on the principal cells is a V2 receptor, which is coupled to adenylyl cyclase via a Gs protein. 

c. The second messenger is cAMP, via phosphorylation steps, directs the insertion of water channels, aquaporin 2 (AQP2), in luminal membranes.

d. The receptor for ADH on the principal cells is a V1 receptor, which is coupled to phospholipase C via Gq protein.

Which one of the following combination of above statements is correct?

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#Question id: 11955

#Unit 7. System Physiology – Animal

The process of obtaining food is known as ________ and requires specialized feeding mechanisms.

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#Question id: 11645

#Unit 7. System Physiology – Animal

Which of the following is inconsistent with the diagnosis of Graves’ disease?

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#Question id: 12171

#Unit 8. Inheritance Biology

In the case of recessive lethal, showing lethality with X^w.  If the female grasshopper  with the genotype (X^+ X^w) is cross with the male grasshopper with the genotype (X^+O) , then what will be the probability of showing lethality in male and female?

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#Question id: 8921

#Unit 9. Diversity of Life Forms

Evidence of which structure or characteristic would be most surprising to find among fossils of the Ediacaran fauna?

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#Question id: 4944

#Unit 11. Evolution and Behavior

What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?