This set of Class 12 Biology Chapter 8 Multiple Choice Questions & Answers (MCQs) focuses on “Human Health and Disease – Drugs and Alcohol Abuse-5”.
1. PCP stands for ____________
Explanation: PCP stands for Phencyclidine drugs. It is available to addicts as angel dust or white granular powder. It is a hallucinogenic drug that causes impaired motor coordination, distortion of body image, etc.
2. Which of the following drug is used in immobilising large animals?
Explanation: Phencyclidine is a veterinary medicine used in immobilising large animals. A dose of 5 mg causes excitement, analgesia, dysarthria, a feeling of estrangement, a horizontal or vertical oscillation of eyeball, vasospasm of cerebral arteries, insomnia, and chronic schizophrenia.
3. Where are cannabinoids obtained from?
a) Cannabis sativa
b) Erythroxylum coca
c) Opium poppy
Explanation: Cannabinoids are obtained from Cannabis sativa. The parts of this plant are used for various purposes like to reduce stress and relieve pain. But the side effects of this drug overpower its medical benefits and sometimes it is abused by people.
4. Where are the cannabinoid receptors present in our body?
Explanation: Cannabinoids are a group of chemicals that interact with cannabinoid receptors present principally in our brains. These drugs are generally taken by inhalation and oral ingestion; these are known for their effects on the cardiovascular system of the body.
5. Only male plants are used to make bhang.
Explanation: To make Bhang, fresh or dried leaves and flowering shoots of both male and female plants are used as ingredients for a drink or other food article, e.g., pakora, tikki.
6. Which of the following plant’s leaves are depicted in the following diagram?
a) Opium poppy
b) Cannabis sativa
d) Atropa belladonna
Explanation: The given diagram represents the leaves of the Cannabis sativa plant. This plant produces four types of hallucinogenic products-Bhang, Ganja, Charas, and Hash oil.
7. From which part of the plant, Ganja is obtained?
a) Female inflorescence
b) Male inflorescence
c) Both male and female inflorescences
d) Leaves of both male and female plant
Explanation: Ganja is a cannabinoid obtained from the dried unfertilised female inflorescence. Usually, it is smoked in cigarettes and pipes. It is the most commonly used illegal drug around the world.
8. Charas is obtained from the pollen grains of the male plant.
Explanation: Charas is generally obtained from the resin collected from the flowering tops of generally female plants. It is usually smoked. Sometimes it is also known as Hashish.
9. What is the psychoactive substance in Hash oil?
a) 9-Delta cannabinoid
Explanation: Hash oil is a lipid-soluble plant extract. It is a highly concentrated form. The psychoactive substance is 9-tetrahydrocannabinol. It is quickly absorbed in the lungs and is converted to a psychedelic chemical 11-hydrotetrahydrocannabinol in the liver.
10. The following diagram represents the structure of __________
Explanation: The given diagram represents the skeletal structure of the cannabinoid molecule. Cannabinoids are a group of chemicals which are obtained from the Cannabis plant. The compounds obtained from the plant are called as Hemp or cannabis compounds.
11. Which of the following symptom is not a symptom observed by the use of Bhang, Charas, or Ganja?
a) Constriction of pupils
b) Anxiety attacks
c) Impaired depth perception
d) Slowing of time sense
Explanation: Use of Bhang, Charas or Ganja leads to Dilation of pupils, Anxiety attacks, light-headedness, Pleasure, Redness of eyes, Increased appetite, Impaired depth perception, Impaired driving ability, slowing of time sense, Delayed response, etc.
12. Which of the following is a physiological change observed in marijuana or hashish smokers?
a) Increased Vital capacity of the lungs
b) Decreased Vital Capacity of the lungs
c) The increased surface area of alveoli
d) Increased functional residual capacity of the lungs
Explanation: In marijuana or Hashish smokers, a decreased vital capacity of the lungs is observed. The regular use of these drugs causes addiction. It further leads to Tachycardia, Precipitation of Angina, Chronic cough, and Bronchitis.
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