Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

23. Lipids

Steroids

GOB Chemistry

23. Lipids

Steroids

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1:29 minutes

Problem 57

Textbook Question

Which of the following are steroid hormones?
a. cholesterol
b. cortisol
c. estradiol
d. testosterone

Verified step by step guidance

Step 1: Understand the definition of steroid hormones. Steroid hormones are a class of hormones derived from cholesterol. They are characterized by their four-ring structure and are involved in various physiological processes such as metabolism, immune response, and reproduction.

Step 2: Analyze the given options. The options provided are cholesterol, cortisol, estradiol, and testosterone. Determine which of these are steroid hormones by identifying their chemical structure and biological role.

Step 3: Evaluate cholesterol. Cholesterol is a precursor molecule for steroid hormones but is not itself a hormone. It is used by the body to synthesize steroid hormones such as cortisol, estradiol, and testosterone.

Step 4: Evaluate cortisol, estradiol, and testosterone. Cortisol is a glucocorticoid hormone involved in stress response and metabolism. Estradiol is an estrogen hormone involved in reproductive processes. Testosterone is an androgen hormone involved in male reproductive development. All three are steroid hormones derived from cholesterol.

Step 5: Conclude that the steroid hormones in the list are cortisol, estradiol, and testosterone. Cholesterol is not a steroid hormone but a precursor for their synthesis.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Steroid Hormones

Steroid hormones are a class of hormones derived from cholesterol, characterized by their lipid-soluble nature. They play crucial roles in regulating various physiological processes, including metabolism, immune response, and reproductive functions. Common examples include cortisol, estradiol, and testosterone, which are synthesized in the adrenal glands and gonads.

Cholesterol

Cholesterol is a type of lipid molecule that serves as a fundamental building block for the synthesis of steroid hormones. While it is essential for hormone production, cholesterol itself is not classified as a steroid hormone. Instead, it is a precursor that undergoes enzymatic conversion to form various steroid hormones in the body.

Hormonal Functions

Hormonal functions refer to the diverse roles that hormones play in the body, including regulation of metabolism, growth, and reproduction. Steroid hormones, in particular, can influence gene expression by binding to specific receptors in target cells, leading to changes in cellular activity. Understanding these functions is key to recognizing the importance of hormones like cortisol, estradiol, and testosterone in maintaining homeostasis.

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