Human Health And Disease — DPP 1

20 NEET questions from Human Health And Disease, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
In the life cycle of Plasmodium, sexual stages (gametocytes) begin to develop in
  1. A Stomach of mosquito
  2. B Intestine of man
  3. C Liver of man
  4. D Red blood cells of man
Show answer & explanation

Correct answer: D

Gametocytes begin to form in RBC of man and completes its further development to form gametes as sexual cycle in mosquito.
2
Which of the following immunoglobulins (Ig) is present in colostrum?
  1. A IgA
  2. B IgG
  3. C IgM
  4. D lgE
Show answer & explanation

Correct answer: A

IgA- Colostrum is a golden liquid substance that a nursing mother expels from her breasts 24-48 hours after delivery.
IgG- Only antibody that can cross the placenta and confers immunity to the foetus.
IgE- Mediator in allergic response.
IgM- Activates first in an initial attack of antigen.
3
In which disorder do the alveoli get filled with fluid leading to severe problems in respiration?
  1. A Common cold
  2. B Whooping cough
  3. C Diphtheria
  4. D Pneumonia
Show answer & explanation

Correct answer: D

Pneumonia: It is characterised by infection of lungs. Due to filling of fluid in alveoli gas exchange cannot occur properly leading to severe problems in respiration.
4
Which of the following is an autoimmune disease?
  1. A Asthma
  2. B Cirrhosis
  3. C AIDS
  4. D Rheumatoid arthritis
Show answer & explanation

Correct answer: D

Asthma- Allergic disease
Cirrhosis- Is a result of advanced liver disease.
AIDS- Caused by HIV which decreases natural immunity of the body.
5
Which one of the following is a viral disease that weakens the muscles?
  1. A Atrophy
  2. B Poliomyelitis
  3. C Dystrophy
  4. D Muscular hypertrophy
Show answer & explanation

Correct answer: B

Poliomyelitis is caused by poliovirus which weakens the muscles.
Atrophy in a condition in which there is degeneration of muscles, it may occur due to cancer, AIDS, COPD etc.
Dystrophy is due to inability to produce dystrophin and is a genetic disorder.
Muscular hypertrophy is increase in size of the cells. e.g., in case of body builders.
6
Internal bleeding, muscular pain, fever, anaemia and blockage of the intestinal passage are the common symptoms of
  1. A Amoebiasis
  2. B Elephantiasis
  3. C Ascariasis
  4. D Typhoid
Show answer & explanation

Correct answer: C

Amoebiasis- Abdominal pain, stools with excess mucus and blood clots.
Elephantiasis-Inflammation of organ in which they reside, swelling of legs, scrotum and other parts of body.
Typhoid- Sustained high fever, weakness, loss of apetite, headache, stomach pain.
7
The spread of cancerous cells to distant sites is termed as
  1. A Metastasis
  2. B Metachrosis
  3. C Metamorphosis
  4. D Metagenesis
Show answer & explanation

Correct answer: A

Metastasis: It is the property of cancerous cells to spread to distant sites through blood and starting a new tumor formation wherever they get lodged in the body.
Metachrosis: Ability of animals to change the intensity of colour.
Metamorphosis: The process of transformation from an immature forms to an adult form in two or more distinct stages.
Metagenesis: Phenomenon in which polyp form of a cnidarian alternates asexually with medusoid form.
8
Which of the following fish is introduced in pond to control or eliminate the vector responsible for the transmission of malaria and filariasis?
  1. A Exocoetus
  2. B Pristis
  3. C Scoliodon
  4. D Gambusia
Show answer & explanation

Correct answer: D

Gambusia is a larvivorous fish that feeds on mosquito larvae.
9
Acid in stomach, saliva in the mouth, tears from eyes, all prevent microbial growth belong to which of the following barriers?
  1. A Physical barrier
  2. B Physiological barrier
  3. C Cellular barrier
  4. D Cytokine barrier
Show answer & explanation

Correct answer: B

One of the barrier of innate immunity
Physical barrier- Skin, muscous coating of epithelium
Cellular barrier- WBC- PMNL, monocytes, NK- cells
Cytokine barrier- Interferons
10
Which of the following drug is extracted from the latex of poppy plant Papaver somniferum, generally taken by snorting and injection, is a depressant and slows down body functions?
  1. A Cocaine
  2. B Hashish
  3. C Barbiturate
  4. D Morphine
Show answer & explanation

Correct answer: D

Cocaine: obtained from Erythroxylum coca, generally snorted. In high doses it causes hallucinations and has a potent effect on central nervous system, producing a sense of euphoria and increased energy.

Hashish: Obtained from Cannabis plant, taken by inhalation and oral ingestion.

Effects on cardiovascular system.

Barbiturates: They are sedatives.

Used as a medicine to help patients cope with mental illness like depression, insomnia etc.

Reduce excitement by depressing the CNS activity and lower physiological activity leading to drownsiness or sleep.
11
The use of vaccines and immunisation programmes have enabled us to completely eradicate a deadly disease like
  1. A Polio
  2. B Tetanus
  3. C Diphtheria
  4. D Small pox
Show answer & explanation

Correct answer: D

It was a deadly disease which is now completely eradicated by using vaccine discovered by Edward Jenner.
12
The treatment of snake bite by antivenom is an example of
  1. A Artificially acquired passive immunity
  2. B Artificially acquired active immunity
  3. C Naturally acquired active immunity
  4. D Naturally acquired passive immunity
Show answer & explanation

Correct answer: A

Because in this preformed antibodies against snake venom are directly injected into the human body.
Artificially acquired active immunity- Includes resistance induced by vaccines.
Naturally acquired passive immunity- IgA and IgG antibodies from mother to baby and foetus respectively.
Naturally acquired active immunity-Acquired when antigens gain access into the body during natural infection.
13
Out of the following diseases which ones are caused due to bacterial infection?
a. Typhoid
b. Elephantiasis
c. Cholera
d. Tuberculosis
  1. A a & b
  2. B b & c only
  3. C a, c & d
  4. D a, b, c & d
Show answer & explanation

Correct answer: C

Typhoid, Cholera and Tuberculosis are caused by bacteria. Elephantiasis is caused by helminth.
14
Use of Cannabis products results in
  1. A Stimulation of nervous system thus increases alertness and activity
  2. B Suppressed brain function and relief in pain
  3. C Depressed brain activity and feeling of calmness
  4. D Alteration of perception, thoughts and feelings
Show answer & explanation

Correct answer: D

Alteration of perception, thoughts and feelings are hallucinations.
15
Which of the following statements is not correct regarding malarial infection?
  1. A Plasmodium enters the human body as sporozoites through the bite of freshly moulted female Anopheles mosquito
  2. B High fever recurring every three to four days
  3. C Sporozoites initially multiply within the liver cells and then attack the RBCs resulting in their rupture
  4. D When a female Anopheles mosquito bites an infected person, these parasites enter the mosquitos body and undergo further development
Show answer & explanation

Correct answer: D

Plasmodium enters the human body as sporozoites through the bite of infected female Anopheles mosquito.
16
The use of anti-histamine, adrenaline and steroids quickly reduces the symptoms of
  1. A Fungal diseases
  2. B Viral diseases
  3. C Allergy
  4. D Helminthic diseases
Show answer & explanation

Correct answer: C

Allergic reaction is due to the release of chemicals like histamine and serotonin from mast cells. Use of drugs like anti-histamine, adrenaline and steroids quickly reduce the symptom of allergy.
Fungal diseases, viral diseases and helminthic infections can be prevented by personal hygiene.
17
HIV decreases natural immunity of the body by
  1. A Destroying antibodies
  2. B Destroying erythrocytes
  3. C Attacking T-lymphocytes
  4. D Attacking B-lymphocytes
Show answer & explanation

Correct answer: C

HIV decreases the number of T-lymphocytes by attacking on it and due to this decrease the person starts suffering from opportunistic infections of bacteria, viruses, fungi etc.
18
Mark the incorrect statement w.r.t. infection of Entamoeba histolytica
  1. A It is a protozoan parasite of human
  2. B It is characterised by constipation and abdominal pain
  3. C It is a parasite of small intestine of man
  4. D Houseflies act as mechanical carriers and serve to transmit the parasite from faeces of infected person to food and food products
Show answer & explanation

Correct answer: C

Entamoeba histolytica is a parasite of large intestine of man.
19
Smoking increases __________ content in blood and reduces the concentration of haembound oxygen.
Fill the blank suitably
  1. A Carbon dioxide
  2. B Carbaminohaemoglobin
  3. C Carbon monoxide
  4. D Carboxylic acid
Show answer & explanation

Correct answer: C

When the smoke is inhaled into lungs, CO is rapidly absorbed into blood stream and it binds to the haemoglobin in the red blood cells 200 times more effectively than oxygen does.
20
Which of the following toxic substance is responsible for the chill and high fever recurring every three to four days in malaria?
  1. A Haemotoxin
  2. B Haemoglobin
  3. C Haemozoin
  4. D Sporozoites
Show answer & explanation

Correct answer: C

Haemozoin - Malarial parasite digests haemoglobin and releases high quantities of free heme. This free heme is toxic to cells and parasite converts it into an insoluble crystalline form called haemozoin.
Haemotoxin - Toxic substances in animal's venom, such as snake's venom.
Haemoglobin - Iron containing metalloprotein in red blood cells.
Sporozoites - Infectious form of malarial parasite.

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