Question
(i) Write three differences between protein hormones and steroid hormones.
(ii) Draw a labelled diagram depicting the mechanism of hormone action.
(ii) Draw a labelled diagram depicting the mechanism of hormone action.
✓
Answer
(i) Differences between Protein hormone and steroid hormone
(ii) A diagram depicting the mechanism of hormone action :
| S. No. | Protein Hormone | Steroid Hormone |
| 1. | Protein hormones act on receptors located on cell membranes. | Steroid hormones act on intracellular receptors. |
| 2. | They produce secondary messengers (such as cyclic $AMP , IP _3, Ca ^{+2}$). | They regulate gene expression or the activity of gene products through hormonal interactions and genomic reciprocal actions. |
| 3. | They regulate cellular metabolism of secondary messengers. Example : Insulin. | Integrated biochemical processes affect the body's physiology and growth. Example : Testosterone. |
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