3. Draw a table listing various hormones secreted in plants and animals with one important
function of each.
Answers
Answer: Hormones are chemical compounds found in living organisms that regulate some functions in the organism and stimulate growth.
Hormones Functions
Animal hormones
1) Growth hormone - growth hormone stimulates growth in tissues and
organs of the body.
2) Insulin - this hormone regulates the blood sugar levels.
3) Oestrogen - This is female hormone responsible for reproduction,
regulating menstruation and onset of menopause.
4) Prolactin - this is the hormone that is stimulates production of
breast milk in females and enables breastfeeding.
5) Aldosterone - hormone that regulates fluid and electrolyte balance in
the body.
6) Antidiuretic hormone - promotes retention of water in the body loss by
prevention of water loss from the body
Thyroid stimulating, follicle stimulating hormone, leuitinizing hormone, oxytocin.
Plant hormones
1) Auxin - this is hormone aids in the elongation of cells of a plant
and bud formation.
2) Cytokinins - this hormone help in shoot formation and cell division.
3) Ethylene - Affects cell growth, shape and ripening of fruits.
4) Giberrelins - Promotes cell elongation
5) Cytokinins - these hormones aid in cell division and delay natural aging
process of plants.
Other plant hormones include; nitric oxide, karrikins, strigolactones, jasmonates, triacotanol and many others.