Tag: biology

Questions Related to biology

Which is not an example of homologous structure

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Heterodont teeth in mammals

  2. different types of vertebrates

  3. Both

  4. None

Show answer
Correct Option: D
Explanation:

Heterodont teeth and different types of vertebrates are examples of homologous structures. The structure which are different in appearance and perform different functions but have similar structure and developmental origin are called homologous organs.

Somatostatin is produced in.

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Adenohypophysis

  2. Neurohypophysis

  3. Pineal gland

  4. Basal part of diencephalon

Show answer
Correct Option: D
Explanation:

Somatostatin is produced from the hypothalamus(one part of the diencephalon) inhibits the pituitary gland's secretion of growth hormone and thyroid stimulating hormone. So, the correct answer is option D.

Which is correct for Vasopressin

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. It is a long peptide in nature

  2. It is also called as Diuretic hormone

  3. It is released from hypothalamus

  4. It is released from adrenal cortex

Show answer
Correct Option: C
Explanation:

Vasopressin is produced by the hypothalamus and is stored in the posterior lobe of the pituitary. It is also called an anti-diuretic hormone (ADH), as it acts on the kidney and promotes re-absorption of water from urine. Thus ADH constantly regulates the amount of water in blood and therefore play a key role in the maintenance of blood pressure.

So the correct answer is "It is released from hypothalamus"

People take drugs to

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Mask the emotions

  2. Forget about the problems for a time being

  3. Face their enemy

  4. Both A and B

Show answer
Correct Option: D
Explanation:
  • People use drugs for many reasons: they want to feel good, stop feeling bad by masking the emotions, or perform better in school or at work, or forget about problems for a time being, or they are curious because others are doing it and they want to fit in. The last reason is very common among teens. 
  • Hence, People take drugs to Mask the emotions and Forget about the problems for a time being.
  •  So, the correct answer is 'Both A and B'.

Alcohol addiction leads to

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Neuritis

  2. Myitis

  3. Albuminuria

  4. Both A and B

Show answer
Correct Option: A
Explanation:
Neuritis is the inflammation of axons of neurons in brain. Alcohol causes inflammation of nerves of peripheral nervous system. It is a severe condition in which nerves are damaged and this can cause unusual sensation in limbs and other body functions are also lost. Other symptoms include numbness in arms and legs, prickling sensations, impaired speech, impotency, vomiting, nausea, heat tolerance, dizziness etc.
So, the correct answer is 'Neuritis'.

The illegal use of medicinal product is called as

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Alcohol abuse

  2. Drug abuse

  3. Medicine abuse

  4. None of the above

Show answer
Correct Option: B
Explanation:
  • Drug abuse is the non-permissive consumption of certain substances or medicinal products that may lead to physical and psychological dependence.
  • Commonly abused drugs include marijuana, cocaine, heroin, alcohol, prescription drugs, etc.
  • The commonly used illegal drug is Marijuana.
  • Signs of drug abuse are bloodshot eyes, pupils larger or smaller than usual, change is sleep patterns, unusual smells on breath, impaired coordination, etc.
  • Hence The illegal use of the medicinal product is called Drug abuse.
  • So, the correct answer is 'Drug abuse'.

Alcoholic addicts suffer from loss of memory. The phenomenon is called

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Amnesia

  2. Neuritis

  3. Dementia

  4. Insomnia

Show answer
Correct Option: A
Explanation:
Amnesia is the loss of memory due to brain damage. Temporarily it can be caused by use of hypnotic and sedative drugs which are sleep inducing drugs. Amnesia occurs when medial temporal lobe of brain is damaged. There may be partial or total loss of memory. The affected person loses the ability to learn anything but doesn't forget his own identity. He is unable to recall anything from past experiences.
So, the correct answer is 'Amnesia'.

Organ most affected by alcohol is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Heart

  2. Cerebrum

  3. Liver

  4. Cerebellum

Show answer
Correct Option: D
Explanation:
The organ most affected by alcohol is cerebellum which is part of brain. When alcohol is absorbed into blood stream, it reaches brain cells because it can easily cross the barrier between brain and blood. It damages brain cells specially of cerebellum. Cerebellum controls balance and movement of body and other motor functions. Due to this, person loses self control and is not even able to stand properly. Loss of muscle coordination occurs due to which speech becomes incoherent. Alcohol also increases reaction time due to which body takes more time to respond to stimulus.
So, the correct answer is 'Cerebellum'.

Drugs 

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Do not pose any health threat

  2. Impair physical and mental health

  3. Causes family disputes

  4. Both B and C

Show answer
Correct Option: D
Explanation:
  • A drug is any substance (other than food that provides nutritional support) that, when inhaled, injected, smoked, consumed, absorbed via a patch on the skin, or dissolved under the tongue causes a physiological change in the body. 
  • In pharmacology, a drug is a chemical substance of known structure, other than a nutrient of an essential dietary ingredient, which, when administered to a living organism, produces a biological effect like Impair physical and mental health and Causes family disputes
  • Hence, drugs are the substance which impairs physical and mental health and causes family disputes. 
  • So, the correct answer is 'Both B and C'.

The disease caused by injectable drug is

innate and learned behaviour option a: neurobiology and behaviour biology

  1. Cancer

  2. AIDS

  3. Heart failure

  4. Tuberculosis

Show answer
Correct Option: B
Explanation:
  • Acquired Immunodeficiency syndrome(AIDS) is caused by a retrovirus called human immunodeficiency viruses(HIV).
  • People transmit HIV in bodily fluids, including, blood, semen, vaginal secretions. anal fluids, breast milk.
  • When an injectable used for AIDS patient is used for the normal individual the HIV virus gets transmitted through blood. Hence The disease caused by the injectable drug is AIDS.
  • So, the correct answer is 'AIDS'.