Which Statement Is True of Sleep Cycles in Normal Sleep

question 16

Multiple Choice

Which statement is true of sleep cycles in normal sleep?

• A) They last about 90 minutes, have 1 or more stages of NREM sleep followed by REM sleep.
• B) They last about 90 minutes and each consists of 1 or more stages of REM sleep.
• C) They last about 60 minutes, have 1 stage of NREM sleep followed by REM sleep.
• D) They last about 90 minutes and each consist of REM sleep followed by 4 stages of NREM sleep.

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Definitions:

YTM

Yield to Maturity; the total return anticipated on a bond if it is held until it matures, considering all interest payments and the principal repayment.

Interest Rate Risk

The potential for investment values to change due to variations in interest rates, affecting especially bonds and other fixed income investments.

Bond Prices

The amount of money required to purchase a bond, which can fluctuate based on interest rates, credit quality, and other factors.

Duration

A financial metric that calculates the weighted average time until a bond or a portfolio of bonds pays out its cash flows, used to assess interest rate risk.