Match each plant with its product and the way it acts…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Match each plant with its product and the way it acts.
- Papaver somniferum
- Cannabis sativa
- Erythroxylum coca
For each plant, give the drug or product, the type of receptor or the neurotransmitter involved, and whether it is a depressant or a stimulant.
Need a reminder? The key ideaShow
Opioids, cannabinoids and coca alkaloids are the commonly abused drugs. Morphine comes from Papaver somniferum, and heroin is made from it by acetylation. Cocaine comes from Erythroxylum coca. In smoke, nicotine raises the blood pressure and the heart rate, and carbon monoxide binds to haemoglobin. Each gram of free haemoglobin carries about mL of oxygen.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) The opium poppy gives morphine, and heroin is made from it. It acts on opioid receptors, and heroin is a depressant.
Step 2. (b) Hemp gives marijuana, hashish, charas and ganja. They act on cannabinoid receptors in the brain. NCERT does not call them either stimulants or depressants. They affect the cardiovascular system.
Step 3. (c) The coca plant gives cocaine. It interferes with the transport of dopamine and is a stimulant.
Answer: (a) morphine and heroin, opioid receptors, depressant; (b) marijuana, hashish, charas, ganja, cannabinoid receptors; (c) cocaine, dopamine transport, stimulant.
Discussion (0)
Log in to join the discussion.
Loading…