| Nicotine intake stimulates the A to release B and C into blood circulation. This lead to increase in D and an increase E .Here A and E refers to |
| a) | A-adrenal gland, B-adrenaline, C-nor-adrenaline, D-blood pressure, E-heart rate | b) | A-thyroid gland, B-thyroxine, C-parathyroxine, D-blood pressure, E-heart rate |
| c) | A-adrenal gland, B-thyroxine, C-nor-adrenaline, D-blood pressure, E-heart rate | d) | A-gonads, B-adrenaline, C-nor-adrenaline, D-blood pressure, E-heart rate |
| (a)A-Adrenal gland, B-Adrenaline, C-Nor-adrenaline, D-Blood pressure, E-Heart rate.Tobacco contains a large number of chemical substances including nicotine, an alkaloid. Nicotine stimulates adrenal gland to release adrenaline and nor-adrenaline into blood circulation, both of which raise blood pressure and increase heart rate. Smoking is associated with increased incidence of cancers of lung, urinary bladder and throat, bronchitis, emphysema, coronary heart diseases, gastric ulcer, etc. |