What Is the Correct Order for the Following Events That

question 85

Multiple Choice

What is the correct order for the following events that follow a nerve impulse along a sympathetic neuron, and which innervates the heart? 1)
G protein activates adenylyl cyclase
2)
Neuron releases norepinephrine
3)
Cyclic AMP activates protein kinase
4)
Receptor activates G protein
5)
Protein kinase phosphorylates Ca²⁺ channels
6)
Receptors activated on the membrane of the cardiac muscle

• A) 1, 3, 4, 5, 2, 6
• B) 5, 3, 4, 1, 2, 6
• C) 6, 2, 4, 1, 3, 5
• D) 2, 6, 4, 1, 3, 5
• E) 2, 3, 4, 1, 6, 5

---

Definitions:

Contribution Margin Ratio

The percentage of each sales dollar that contributes to covering fixed costs and generating profit.

Pre-tax Income

The total earnings of a company before any taxes have been deducted, often considered when assessing the profitability of a company.

Contribution Margin

The contribution margin is the revenue from a product or service minus the variable cost, indicating how much contributes to covering fixed costs and generating profit.

Net Income

A company's overall income following the subtraction of all costs, taxes, and expenses from its gross revenue.