7-dehydrocholesterol

(noun)

7-dehydrocholesterol is a cholesterol precursor that is converted to vitamin D3 in the skin, therefore functioning as provitamin-D3.

Examples of 7-dehydrocholesterol in the following topics:

  • Metabolic Functions

    • One of the metabolic functions of the skin is the production of vitamin D3 when ultraviolet light reacts with 7-dehydrocholesterol.
    • Vitamin D3 is made in the skin when the 7-dehydrocholesterol reacts with ultraviolet light of UVB type at wavelengths between 280 and 315 nm, with peak synthesis occurring between 295 and 297 nm.
  • Solutions to Exercises in Chapter 8

    • Solutions to Practice: The Central Limit Theorem Solution to Exercise 7.6.1
  • Practice: One-Way ANOVA

  • Skewness and the Mean, Median, and Mode

    • 4 ; 5 ; 6 ; 6 ; 6 ; 7 ; 7 ; 7 ; 7 ; 7 ; 7 ; 8 ; 8 ; 8 ; 9 ; 10
    • 4 ; 5 ; 6 ; 6 ; 6 ; 7 ; 7 ; 7 ; 7 ; 8
    • The mean is 6.3, the median is 6.5, and the mode is 7.
    • 6 ; 7 ; 7 ; 7 ; 7 ; 8 ; 8 ; 8 ; 9 ; 10
    • The mean is 7.7, the median is 7.5, and the mode is 7.
  • Practice 2: Confidence Intervals for Means, Unknown Population Standard Deviation

  • Negative Exponents

    • $\dfrac{7 \cdot 7 \cdot 7}{7 \cdot 7 \cdot 7 \cdot 7 \cdot 7}$
  • Practice: The Central Limit Theorem

    • What causes the probabilities in Exercise 7.6.1 and Exercise 7.6.2 to differ?
  • Practice 2: Exponential Distribution

    • Exercise 5.7.6: Find the amount (percent of 1 gram) of carbon-14 lasting less than 5730 years.
    • Exercise 5.7.7: Find the percentage of carbon-14 lasting longer than 10,000 years.
    • Exercise 5.7.8: Thirty percent (30%) of carbon-14 will decay within how many years?
  • Practice 1: Hypothesis Testing for Two Proportions

  • Practice: The Normal Distribution

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