Tag: option a: neurobiology and behaviour

Questions Related to option a: neurobiology and behaviour

Sexual potency of an alcoholic person

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Increases

  2. Decreases

  3. Remains unaltered

  4. Is marred by phobias

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Correct Option: B

Drinking alcohol

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Stimulates muscle activity

  2. Speeds up impulse transfer

  3. Impairs coordination of different body parts

  4. Makes the driver extra careful

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Correct Option: C
Explanation:
Drinking is the addiction of alcohol which has many serious effects on body. Cerebellum of brain gets affected which causes loss of muscle coordination due to which speech becomes incoherent. Inflammation of axons occur which leads to neuritis. Alcohol acts as depressant of all body functions and all senses become dull. It removes learned behaviour and due to this, a person after drinking beaves in a uncivilised manner. 
So, the correct answer is 'Impairs coordination of different body parts'.

Alcohol

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Increases reaction time

  2. Decreases reaction time

  3. Does not affect reaction but diminished decision making

  4. Both B and C

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Correct Option: A
Explanation:
Reaction time is the time taken to give response to a stimulus. Alcohol increases reaction time i.e. the body takes more time to respond to a stimulus. It affects the ability of body to react in response to a stimulus. Alcohol affects brain due to which the region of brain associated with processing of nerve signals is affected. Signals travel in brain from one neuron to other neuron. Alcohol increases the time in which a signal crosses the gap between two neurons i.e. synapse. Hence, the ability of body to interpret, perceive and responding to stimulus is greatly affected.
So, the correct answer is 'Increases reaction time'.

Syndrome found in alcohol addicts which is characterised by loss of recent and past memory without affecting normal intelligence is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Wernicke's syndrome

  2. Korsakoff's syndrome

  3. Laenec's syndrome

  4. Foetak alcohol syndrome

Show answer
Correct Option: B
Explanation:
Korsakoff's syndrome is a chronic disorder of memory that occurs due of deficiency vitamin B6 or thiamine. Deficiency of thiamine occurs due to alcoholism. This disorder doesn't affect normal intelligence, instead the memory of recent and past few minutes is affected. The person fails to remember the events that happened in the last few minutes. The person can also forget everything that happened after the onset of this disorder.
So, the correct answer is 'Korsakoff's syndrome'.

Vitamin which is most likely to become deficient in alcoholics is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Ascorbic acid

  2. Thiamine

  3. Niacin

  4. Riboflavin

Show answer
Correct Option: B
Explanation:
Alcoholic persons are dependent on consuming alcohol and there is irresistible craving for drinking alcohol. Alcohol has many serious impacts on health. Alcoholic persons suffer from anaemia. They are deficient in vitamins folic acid and thiamine (vitamin B6). Studies have shown that the deficiency of thiamine is responsible for the craving of alcohol.
So, the correct answer is 'Thiamine'.

Coffee and Tea are

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Fermented beverages

  2. Alcoholic beverages

  3. Distilled beverages

  4. Non alcoholic beverages

Show answer
Correct Option: D
Explanation:
Coffee and tea are non alcoholic beverages. They are mild stimulating drinks which do not contain alcohol. Coffee and tea contain caffeine. Chemically caffeine is 1,3,7- trimethyl xanthine. It is a stimulant of CNS (Central nervous system). It is a mild diuretic and increases urine output. Tea and coffee reduce sleep and drowsiness and reduce anxiety. These beverages are addictive and withdrawal can cause muscle pain and headache.
So, the correct answer is 'Non alcoholic beverages'.

Addiction of LSD leads to

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Hallucination

  2. Damage to kidneys

  3. Mental and emotional disturbance

  4. Damage of lungs

Show answer
Correct Option: C
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 hallucinogens and change mood, behaviour and thoughts. They mimic the chemical messenger serotonin in brain. They powerful hallucinations and alter senses that result in pleasant or unpleasant sensations in the body. Thus, they can cause mental and emotional disturbance.
So, the correct answer is 'Mental and emotional disturbance'.

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'.