Tag: biology

Questions Related to biology

In a drunk person, the part of brain to be affected first is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Cerebellum

  2. Pons varolli

  3. Medulla oblongata

  4. Cerebrum

Show answer
Correct Option: A
Explanation:
When a person gets addicted to alcohol, many serious health problems can occur due to consumption of alcohol. The first part of brain to be affected first is Cerebellum. The will power and self control of the person gets reduced. Control over emotions and moral sense also gets reduced. Loss of muscle coordination also occurs as cerebellum is affected. As a result, speech becomes incoherent. Inflammation of axons also occur which causes neuritis.
So, the correct answer is 'Cerebellum'.

Caffeine, amphetamine and cocaine are

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Sedatives

  2. Tranquillisers

  3. Hallucinogens

  4. Stimulants

Show answer
Correct Option: D
Explanation:
Caffeine and cocaine are natural stimulants while amphetamine are synthetic stimulants. Stimulants are the drugs that stimulate nervous system and make a person more alert and cause excitement. Caffeine is a bitter alkaloid and stimulant of CNS. Cocaine is a anaesthetic and delays fatigue but excess dosage can cause hallucinations. Amphetamines are commonly known as pep pills or anti-sleep pills. They stimulate respiratory centre, reduce hunger and sleep.
So, the correct answer is 'Stimulants'.

In alcoholics, liver gets damaged due to

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Accumulation of fats

  2. Storage of glycogen

  3. Secretion of more bile

  4. Detoxification of alcohol

Show answer
Correct Option: A
Explanation:
Consuming alcohol cause fatty liver syndrome. It is the build-up of fat in liver. Gradually the liver hardens and dries up. The healthy cells of liver are replaced by fibrous tissue. This leads to build up of scar tissue in liver and leads to cirrhosis. Due to this, activities like protein synthesis and glycolysis are greatly reduced in liver. The structure of liver also gets changed and blood flow is blocked. Ultimately, it leads to failure of liver.
So, the correct answer is 'Accumulation of fats'.

LSD is obtained from

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Fungus

  2. Lichen

  3. Alga

  4. Bacterium

Show answer
Correct Option: A
Explanation:
LSD (Lysergic acid diethylamide) are powerful hallucinogens. They are obtained from the sclerotia of ergot fungus, Claviceps purpurea, present on rye plant. They are natural and powerful hallucinogens that change mood, behaviour and thoughts. They may cause pleasant or unpleasant sensations in the body. They effect cerebrum and sense organs and produce euphoria (excitement).
So, the correct answer is 'Fungus'.

Match the columns

Column I Column II
(a) Opiate (p) Ganjaland Charas
(b) Stimulants (q) Nembutal A and Seconal
(c) Hallucinogens (r) Benzendine and Methedrine
(d) Depressants (s) Rum and Whisky
(t) Opium and Heroin
innate and learned behaviour option a: neurobiology and behaviour biology

  1. a-s; b-t; c-r; d-p

  2. a-t; b-q; c-r; d-p

  3. a-t; b-r; c-q; d-p

  4. a-t; b-r; c-p; d-q

Show answer
Correct Option: D
Explanation:
(a) Opiates are derived from opium, the dried latex of poppy plant. Heroin is a semisynthetic opiate obtained from acetylation of a natural opiate morphine.
(b) Benzedrine and Methedrine are synthetic stimulants which stimulate nervous system and increase alertness and excitement.
(c) Ganja and Charas are hallucinogens obtained from Cannabis sativa (Hemp).
(d) Nembutal A and seconal are barbiturates, a type of sedative drugs that induce sleep. These are depressants of central nervous system and lower the activity of brain leading to sleep.
So, the correct answer is 'a-t; b-r; c-p; d-q'.

Which drug is also known as superman?

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Amphetamine

  2. Heroin

  3. Cocaine

  4. LSD

Show answer
Correct Option: A
Explanation:
Amphetamines are drugs that are synthetic stimulants. They are called as pep-pills or anti-sleep pills. They stimulate respiratory system, reduce hunger and sleep. They are included in dope test for athletes. High doses of amphetamines drugs can cause sleeplessness and euphoria (feeling of excitement). There are many amphetamine drugs including para-Methoxyamphetamine, known as superman.
So, the correct answer is 'Amphetamine'.

Analgesic drugs

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Form tissues

  2. Relieve pain

  3. Relieve fatigue

  4. Cause pain

Show answer
Correct Option: B
Explanation:
Analgesic drugs are pain killers. They are used to relieve pain. They act on central and peripheral nervous system. There are many group of analgesics such as simple analgesics (paracetamol and aspirin), non-steroidal anti inflammatory drugs (Ibuprofen and Naproxen Sodium) and opioids (morphine, pethidine). These drugs are sold under medical prescription and their long term use can develop tolerance in the body due to which the effectivity of drugs is used.
So, the correct answer is 'Relieve pain'.

Synthetic drugs structurally related to adrenaline are

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Amphetamines

  2. Barbiturates

  3. Analgesics

  4. Hallucinogens

Show answer
Correct Option: A
Explanation:
Amphetamines are synthetic stimulants commonly known as pep pills or anti-sleep drugs. They are structurally similar to adrenaline. Adrenaline is a neurotransmitter secreted from adrenal medulla in response to stress conditions in the body. They are used in dope test for athletes. They are stimulants of CNS (central nervous system). They speed up the messages transmitted between brain and body. They stimulate respiratory centre, suppress hunger and cause addiction. High doses of amphetamine cause sleeplessness and vomiting. 
So, the correct answer is 'Amphetamines'.

Alcohol is the most socially accepted narcotic drug. Consumption of alcohol leads to

innate and learned behaviour option a: neurobiology and behaviour biology

  1. State of hallucination

  2. Suppression of brain activity

  3. Loss of memory

  4. Cirrhosis of liver

Show answer
Correct Option: D
Explanation:
Consumption of alcohol can cause cirrhosis in liver, a disease in which permanent damage occurs to liver. Cirrhosis is a degenerative disease of liver in which liver gradually hardens and dries up as its cells are replaced by fibrous tissue. The scar tissue builds up in the liver and this leads to change in structure of liver which blocks the blood flow. Cirrhosis can cause varicose veins which can rupture and cause to internal bleeding. Consuming too much alcohol ultimately leads to liver failure.
So, the correct answer is 'Cirrhosis of liver'.

One of the following is a stimulant

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Opium

  2. LSD

  3. Cocaine

  4. Heroin

  5. Cannabis

Show answer
Correct Option: C
Explanation:

Cocaine is a powerfully addictive stimulant made from leaves of coca plant native to south america. Once it enters the body  people feel energetic and it also boosts mental alertness