medium difficulty8 min

Vitamins and Hormones

Vitamins are organic compounds required in small amounts for normal growth and metabolism, while hormones are chemical messengers secreted by endocrine glands to regulate body processes.

In one line: ADEK stay with fat; B and C go with water.

Practice This Concept

Understand it

Vitamins are classified by solubility.
Fat-soluble vitamins are A, D, E, and K, while water-soluble vitamins include B-group vitamins and vitamin C.
Deficiency of vitamins can cause specific disorders, such as scurvy due to vitamin C deficiency and rickets due to vitamin D deficiency.
Hormones regulate physiological processes by carrying chemical signals in the body.
In Chemistry exams, the focus is on classification, examples, and general regulatory role rather than treatment advice.

Example

Vitamin C is water-soluble and its deficiency is associated with scurvy. Vitamin D is fat-soluble and its deficiency is associated with rickets.

Rule to remember

Classification rule: fat-soluble vitamins are A, D, E, and K; water-soluble vitamins include B-group vitamins and C.

Hormone rule: hormones act as chemical messengers for regulation, not as general energy-yielding nutrients.

See it worked out

Follow the example line by line, then use the same method on new questions.

Worked example

Classify vitamin C and vitamin K.

1Vitamin C is water-soluble and linked with scurvy deficiency.
2Vitamin K is fat-soluble and is associated with blood clotting function at this level.

Method you can reuse

1First decide whether the item is a vitamin or hormone.
2For vitamins, apply the solubility rule: A, D, E, K are fat-soluble; B and C are water-soluble.
3Then add one correct deficiency association if asked.

Visual tip

A comparison table is more useful than a structural diagram: columns for type, examples, solubility, and deficiency association.

Check yourself

Answer the question in your head before opening the answer.

Try it yourself

Which vitamins are fat-soluble?

Think first, then show answer

Vitamins A, D, E, and K are fat-soluble.

Common wrong answer

Writing that hormones are vitamins is wrong; hormones are regulatory chemical messengers, while vitamins are required dietary organic compounds in small amounts.

Don't mix this up

Students often write vitamin B and C as fat-soluble because they are common dietary vitamins. They are water-soluble.

Exam tip

Remember fat-soluble vitamins as A, D, E, K. Most others commonly discussed at this level are water-soluble.

Write it in the exam

Each point is worth about one mark. Write point 1 for a 1-mark question and keep adding points as the marks go up.

How CBSE asks it

Asked as classification of vitamins, deficiency disease matching, distinction between vitamins and hormones, or role of hormones as chemical messengers.

1
Enough for 1 mark
Vitamins are organic compounds required in small amounts for normal growth and metabolism, while hormones are chemical messengers secreted by endocrine glands to regulate body processes.
2
Add for 2 marks
Example: Vitamin C is water-soluble and its deficiency is associated with scurvy. Vitamin D is fat-soluble and its deficiency is associated with rickets.
3
Add for 3 marks
Fat-soluble vitamins are A, D, E, and K, while water-soluble vitamins include B-group vitamins and vitamin C.

MCQ Quiz

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