Question

Chemical hormones are _____.

• A. Amino acid and peptide derivatives
• B. Proteins
• C. Steroids only
• D. All the above

Answer 1

The correct option is D

All the above

Hormones or chemical messengers are of four types:

1. Amino acid derivatives: The building block of these hormones are amino acids, for example, thyroid hormone, epinephrine, and norepinephrine.

2. Peptide hormones are composed of peptides (two or more amino acids joined by peptide bonds), for example, oxytocin, and insulin.

3. Protein hormones which are majorly trophic hormones that regulate the secretions of other endocrine glands, for example, somatotropin, thyrotropin, gonadotropin, human chorionic gonadotropin, and human chorionic somatomammotropin.

4. Steroid hormones or derivatives of cholesterol, for example, adrenaline and cortisol.