Questions: D1 receptor increase in CAMP D2 receptor decrease in CAMP beta 1 receptor increase in CAMP alpha 2 receptor decrease in CAMP beta 2 receptor increase in CAMP m2 receptor decrease in CAMP 5 HT1 receptor decrease in CAMP 5 HT4 receptor increase in CAMP

The information provided lists various receptors and their effects on cyclic AMP (cAMP) levels. Here's a summary of the effects of each receptor on cAMP:

1. D1 receptor: Increases cAMP

   • D1 receptors are dopamine receptors that, when activated, stimulate adenylate cyclase, leading to an increase in cAMP levels.

2. D2 receptor: Decreases cAMP

   • D2 receptors are also dopamine receptors, but they inhibit adenylate cyclase, resulting in a decrease in cAMP levels.

3. Beta 1 receptor: Increases cAMP

   • Beta 1 adrenergic receptors, when activated, stimulate adenylate cyclase, leading to an increase in cAMP levels.

4. Alpha 2 receptor: Decreases cAMP

   • Alpha 2 adrenergic receptors inhibit adenylate cyclase, resulting in a decrease in cAMP levels.

5. Beta 2 receptor: Increases cAMP

   • Similar to beta 1 receptors, beta 2 adrenergic receptors stimulate adenylate cyclase, increasing cAMP levels.

6. M2 receptor: Decreases cAMP

   • M2 muscarinic receptors inhibit adenylate cyclase, leading to a decrease in cAMP levels.

7. 5 HT1 receptor: Decreases cAMP

   • 5-HT1 receptors are a subtype of serotonin receptors that inhibit adenylate cyclase, resulting in decreased cAMP levels.

8. 5 HT4 receptor: Increases cAMP

   • 5-HT4 receptors are another subtype of serotonin receptors that stimulate adenylate cyclase, leading to increased cAMP levels.

In summary, receptors that increase cAMP typically stimulate adenylate cyclase, while those that decrease cAMP inhibit it.