Select the correct statement from the ones given below :
- Cocaine is given to patients after surgery as it stimulates recovery
- Chewing tobacco lowers blood pressure and heart rate
- Barbiturates when given to criminals make them tell the truth
- Morphine is often given to persons who have undergone surgery as a pain killer
Answer
(4) Morphine is often given to persons who have undergone surgery as a pain killer
Solution
As per NCERT, morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery. (4) is correct.
(1) Incorrect: cocaine is a stimulant drug of abuse that interferes with dopamine transport; it is not given to aid recovery.
(2) Incorrect: nicotine in tobacco stimulates the adrenal gland to release adrenaline and nor-adrenaline, which raise blood pressure and heart rate.
(3) Incorrect: barbiturates are sedatives (depressants); they do not make a person tell the truth.
Answer: (4)