In a Cell with β-Adrenergic Receptors Coupled to the CAMP

question 37

Multiple Choice

In a cell with β-adrenergic receptors coupled to the cAMP second messenger system, what would happen to that signaling pathway if you blocked adenylate cyclase?

• A) This would make β-adrenergic receptor activation using the cAMP pathway irreversible.
• B) This would have no effects on β-adrenergic receptor signaling using the cAMP pathway.
• C) This would make β-adrenergic receptor activation using the cAMP pathway last longer.
• D) This would prevent β-adrenergic receptor activation from causing any effects through the cAMP pathway.
• E) This would mimic the signaling pathway, causing the same effect as activation of the β-adrenergic receptor.

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Definitions:

Inventory Turnover

A financial ratio that measures how many times a company's inventory is sold and replaced over a specific period, indicating the efficiency of inventory management.

Accounts Receivable Turnover

A financial metric that measures how often a company collects its average accounts receivable within a specific period.

Return On Total Assets

A profitability ratio that measures the net income produced by the total assets within a company over a period, indicating how effectively a company uses its assets to generate profit.

Times Interest Earned

A financial ratio that measures a company's ability to meet its interest payments on outstanding debt with its earnings before interest and taxes.