Figure 12-2 the Nerve Action Potential

question 21

Multiple Choice

Figure 12-2 The Nerve Action Potential

Use Figure 12-2 to answer the following questions:
-What is occurring at the area labeled #4?

• A) An inhibitory stimulus has occurred.
• B) Chemically gated potassium channels have opened.
• C) Excessive potassium has diffused out causing hyperpolarization.
• D) Sodium ions have been pumped out of the neuron.
• E) Excessive depolarization of the axon has occurred.

---

Definitions:

Standard Costing

An accounting method that uses predetermined costs for product costing, performance evaluation, and decision making.

Labour Efficiency Variance

A metric that measures the difference between the actual labor hours used in production and the standard or expected hours, often indicating labor performance.

Variable Overhead

Indirect production costs that fluctuate with the level of production output, such as utilities for the manufacturing plant.

Labour Rate Variance

The difference between the actual cost of direct labor and the expected (or standard) cost, based on the standard rate times the actual hours worked.