Tag: biology

Questions Related to biology

Pep pills contain

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Cocaine

  2. Amphetamine

  3. Morphine

  4. Caffeine

Show answer
Correct Option: B
Explanation:
Pep pills are the pills containing a stimulant drug. These pills contain amphetamines. Amphetamines are synthetic stimulants and are structurally similar to adrenaline. Adrenaline is a neurotransmitter secreted from adrenal medulla in response to stress conditions in the body. They are stimulants of CNS (central nervous system). They speed up the messages transmitted between brain and body. They make a person more energetic and awake but overdoses can have side effects too.
So, the correct answer is 'Amphetamine'.

Alcoholics suffer from the deficiency of vitamin

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Thiamine

  2. Riboflavin

  3. Niacin

  4. Pantothenic acid

Show answer
Correct Option: A
Explanation:
Alcoholic persons have deficiency of vitamin thiamine. Alcohol affects the absorption of thiamine from intestine and stomach because it causes inflammation of the lining and also impairs the transport of thiamine in enterocytes. Deficiency of thiamine can lead to serious disorders of brain like Wernicke's syndrome and Korsakoff's syndrome. Other vitamins also get depleted due to alcohol consumption.
So, the correct answer is 'Thiamine'.

Alcoholics suffer from double vision and reduced muscular coordination. The defect is called

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Korsakoff's syndrome

  2. Wernicke's syndrome

  3. Bernheim's syndrome

  4. Asperger's syndrome

Show answer
Correct Option: B
Explanation:
Double vision and reduced muscular coordination are symptoms of Wernicke's syndrome which occurs due to consuming alcohol. It is a disorder of brain which occurs due to deficiency of vitamin B6 or thiamine which in turn is caused by alcohol. There are uncontrolled eye movements in this disorder. The person shows a confused mental state resulting in violent behaviour. 
So, the correct answer is 'Wernicke's syndrome'.

Stimulant that raises body temperature and blood pressure is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Theobromine

  2. Theophylline

  3. Dexedrine

  4. Cocaine

Show answer
Correct Option: A
Explanation:
Theobromine is a bitter alkaloid which is found in cocoa plant (cocoa beans from which chocolate is prepared) and in tea leaves also. It belongs to class of xanthine alkaloids. It is a natural stimulant which stimulates nervous system and makes a person more active, alert and excited. It is a vasodilator and acts as a stimulant of heart. If theobromine is taken in excess amount, it raises heart beat, blood pressure and body temperature.
So, the correct answer is 'Theobromine'.

Which one is affected after drinking?

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Coordination of body parts

  2. Reaction time

  3. Power of accommodation

  4. All of the above

Show answer
Correct Option: D
Explanation:
Alcohol has many effects on body:
  • It affects cerebellum in brain which results in loss of muscle coordination. Due to this coordination of body parts is lost like speech becomes coherent and the person can't even walk properly.
  • Alcohol increases reaction time. It is the time taken by body to respond to a stimulus. As a result of alcohol consumption, body takes more time to respond to a stimulus.
  • Alcohol effects the power of accommodation of eye which is the ability of eye to focus on objects at different distances for clear visibility. For this reason, alcoholic persons are advised not to drive because their eyes can't focus on objects and this increases the chances of accident. 
Hence, all the options are correct.
So, the correct answer is 'All of the above'.

Cocaine interferes with transportation of neurotransmitter _________.

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Serotonin

  2. Dopamine

  3. Epinephrine

  4. Acetylchotine

Show answer
Correct Option: B
Explanation:
Cocaine is a natural stimulant. It stimulates nervous system and delays fatigue. It interferes with the transportation of neurotransmitter dopamine which is a catecholamine. Dopamine carries signals from one neuron to other. It is released in the gap between two neurons i.e. synapse. It binds to dopamine receptors of the neighboring neuron. The receptors are specialized proteins. Cocaine binds with these receptors and thus interferes with the transportation of dopamine across the neurons.
So, the correct answer is 'Dopamine'.

Fatty alcohol syndrome occurs in

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Alcoholic men

  2. Alcoholic women

  3. Children of alcoholic mothers

  4. All the alcoholics

Show answer
Correct Option: D
Explanation:
Consumption of alcohol leads to fatty liver syndrome in which there is build-up of fat in liver in both men and women. 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. This causes permanent damage to the liver. 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.
So, the correct answer is 'All the alcoholics'.

Stimulant present in betel nut is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Caffeine

  2. Theobromine

  3. Arecoline

  4. Amphetamine

Show answer
Correct Option: C
Explanation:
Betel nut or areca nut is a fruit of palm tree. It is a mild stimulant because it contains an alkaloid arecoline. Arecoline is a bitter alkaloid and a stimulant of central nervous system (CNS). Stimulants make a person alert and active and increase the excitement. Arecoline mimics the receptors of nicotine in brain and thus, it can have parasympathetic effects also in the body. Generally betel nut is chewed with betel leaf to have a stimulating effect. 
So, the correct answer is 'Arecoline'.

Arteries of an alcoholic become

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Dilated

  2. Rigid

  3. Brittle

  4. All the above

Show answer
Correct Option: A
Explanation:
Alcohol acts as a vasodilator. It causes the blood vessels to dilate due to which blood flow to skin and tissues is increased. This results in decrease in blood pressure. However drinking too much alcohol can cause constriction of blood vessels due to deposition of alcoholic fat on the walls of blood vessels resulting in decreased lumen of blood vessels.
So, the correct answer is 'Dilated'.

Stimulant alkaloid present in Tea is_________________.

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Thebaine

  2. Tannin

  3. Caffeine

  4. Both B and C

Show answer
Correct Option: C
Explanation:

The main methylxanthine (Stimulant alkaloid)  in tea is caffeine. Other methylxanthines are two theobromine and theophylline, which are similar compounds.