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Questions
State properties of hormones.
Enlist any two properties of hormones.
Solution
- They act as chemical messengers and are effective in very low concentration.
- Hormones can function as regulators that inhibit or stimulate or modify specific processess.
- Some hormones interact with receptors present on plasma membrane of target cells where as some enter the nucleus to interact with genes.
- Hypersecretion or Hyposecretion of hormones leads to various disorders.
- These are metabolised after their function. Thus cannot be reused.
- Hormone secretion is regulated by positive or negative feedback mechanism.
Notes
Students should refer to the answer according to their questions.
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RELATED QUESTIONS
Name the source and the function of each of the following hormones:
| Hormone | Source | Function |
| (a) Glucagon | ||
| (b) Thyroxine | ||
| (c) Adrenaline | ||
| (d) Insulin | ||
| (e) Cortisone |
Multiple choice question. Tick (✓) the correct choice:
Master endocrine gland
- thyroid
- pituitary
- pancreas
- adrenal
Fill in the blank:
The hormone insulin is secreted by ____________.
State whether the following statement is true (T) or false (F):
The adrenal gland helps the body to fight stress.
Find the odd-one out, giving reason:
Pituitary, adrenal, thyroid, salivary gland
Given below is an outline of the human body. Draw and label on the diagram.
- the gland that secretes insulin.
- the gland that produce adrenaline.
Choose the incorrect statement about insulin.
Which statement is not true about thyroxin?
Match the terms of Column (A) with those of Column (B)
| Column (A) | Column (B) |
| (a) Olfactory receptors | (i) Tongue |
| (b) Thermo receptors (temperature receptors) | (ii) Eye |
| (c) Gustatoreceptors | (iii) Nose |
| (d) Photoreceptors | (iv) Skin |
Chemically, some hormones are ______ some steroids, some ______.
