What External Stimulation Is Required by Mammalian Cells to Progress

question 14

Multiple Choice

What external stimulation is required by mammalian cells to progress through the cell cycle prior to reaching the restriction point?

• A)presence of steroid hormones in their culture medium
• B)presence of Na+ ions in their culture medium
• C)presence of growth factors in their culture medium
• D)no external stimulation is required
• E)presence of vitamins in their culture medium

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Definitions:

Market Economy

An economic system where the allocation of resources is determined by supply and demand in the market rather than by a central plan.

Unemployment

The situation in which people who are able and willing to work cannot find a job.

Real Output

The production of goods and services in an economy adjusted for inflation, allowing for comparison of economic productivity over different time periods by reflecting the actual volume of production.

Price Levels

The general level of prices for goods and services in an economy at a specific point in time.