Biology

Human Immunity and Blood

2,096 Questions

Human immunity and blood questions cover the physiological mechanisms protecting the body against diseases and the components of blood. Topics include blood groups, cell mediated immunity, monoclonal antibodies, and blood coagulation. These biology topics frequently appear in general science sections of competitive exams.

Blood groupsCell mediated immunityMonoclonal antibodiesBlood coagulationCancer immunology

Human Immunity and Blood Questions

Multiple choice biology chemical coordination and integration kidney hormones coordination in human beings- chemical control endocrine system in humans

Erythropoietin stimulates

  1. Osmoregulation

  2. Formation of RBC

  3. Reduces blood pressure

  4. Formation of WBC
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Erythropoietin is also known as haemopoietin. It is a glycoprotein secreted from juxtaglomerular cells of kidney. It stimulates the formation of RBCs in bone marrow and this process is called erythropoiesis. RBCs (Red Blood Cells) carry oxygen and transport it to various parts of body. Erythropoietin is secreted in response to hypoxic conditions i.e. low oxygen in body.
So, the correct answer is 'Formation of RBC'.
Multiple choice common health problem international health bodies health organisation biology

The blood system combats infection by producing

  1. Antibodies

  2. Antigens

  3. Antibiotics

  4. Antiseptics
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antibodies are chemicals (immunoglobulins) produced by certain of the white cells in the blood. They neutralize or destroy foreign substances in the blood such as bacteria or their products.

Multiple choice evs a treat for mosquito anaemia mosquito and human health diseases caused by mosquitoes

Complete blood count test provides us with

  1. Information about the cell

  2. An overview of patient's health status

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A complete blood count (CBC) is a test panel requested by a doctor or other medical professional that gives information about the cells in a patient's blood. It is the most commonly performed blood tests in medicine, as they can provide an overview of a patient's general health status. 

Therefore, the correct answer is option C.

Multiple choice evs a treat for mosquito anaemia mosquito and human health diseases caused by mosquitoes non communicable diseases

Anaemia can be diagnosed by the

  1. Shape and size of RBC only

  2. Number of platelets only

  3. Size and shape of WBC only

  4. Number of WBC only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  •  To diagnose anaemia, your doctor may ask you about your medical and family history, perform a physical exam, and run the following tests: Complete blood count (CBC) or Red cell distribution width (RDW).
  •   A CBC is used to count the number of blood cells in a sample of your blood.
  • Red cell distribution width (RDW) is also the test to diagnose anaemia. For instance, you'll probably have greater differences in red blood cell size if you have anaemia in these test.
  • Hence, Anaemia can be diagnosed by the shape and size of RBC only.
  • So, the correct answer is 'Shape and size of RBC only'.

Multiple choice biology biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

Progenitors formed in bone marrow but differentiating elsewhere are

  1. Pre-NK cells

  2. Pre-erythroblasts

  3. Pre-T cells

  4. Myeloblasts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pre T cells are progenitors of T- lymphocytes which are produced from the bone marrow. Pre- T cells undergo differentiation and maturation in the thymus to form matured T- cells. T-cells can be distinguished from other lymphocytes by the presence of a T-cell receptor on the cell surface.  Hence, Progenitors formed in bone marrow but differentiating elsewhere are Pre-T cells.

So, the correct answer is 'Pre-T cells'.

Multiple choice biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

Which of the following blood group is a universal donor?

  1. $AB^{+ve}$
  2. $O^{+ve}$
  3. $AB^{-ve}$
  4. $O^{-ve}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

People with type O- negative blood are the universal donor for the whole blood. That means that, anyone can receive this blood type. Being O- negative, this blood group is compatible with all the blood groups, A${^+}$and A${^-}$ve, B${^+}$ve, B${^-}$ve, and AB${^+}$, AB${^-}$ve. And the chances of rejection is the least.
Therefore, the correct answer is option D.

Multiple choice biology animal tissues fluid connective tissue tissues of animals animal tissues and its type

A person with blood group O has 

  1. Only anti- A antibodies

  2. Only anti- B antibodies

  3. Both anti- A and anti- B antibodies

  4. Both A and B antigens
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The blood group found in human beings are of four principal types: A, B, AB and O. These types are differentiated on the basis of two antigens A and B and two antibodies A and B present in the blood types. The specific combination of antigens and antibodies determines an individual's blood type. A person with blood group O has no antigen on the surface of the RBC but has both, anti- A and anti- B antibodies in his plasma.

Therefore, the correct answer is option C.

Multiple choice zoology important and common human diseases diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

Cells obtained from cancerous tumours are known as

  1. Hybridoma

  2. Lymphocyte

  3. Monoclonal cells

  4. Myeloma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Myeloma, also known as multiple myeloma, is a blood cancer arising from plasma cells. 
  • Plasma cells are a type of white blood cell made in the bone marrow. Bone marrow is the ‘spongy’ material found in the centre of the larger bones in the body and is where all blood cells are made. 
  • Myeloma develops when DNA is damaged during the development of a plasma cell. 
  • This abnormal cell then starts to multiply and spread within the bone marrow.
  • Hence, Cells obtained from cancerous tumours are known as Myeloma.
  •  So, the correct answer is 'myeloma'.
Multiple choice zoology important and common human diseases allergy and autoimmune diseases allergy non infectious diseases

How many sentences is/are true among the following sentences?
(a) Allergy is due to release of histamine and serotonin from mast cells.
(b) Cell mediated immunity is responsible for rejection of graft.
(c) Principles of vaccination is based on diversity of immune system.
(d) Both bone marrow and thymus provides micro environment for development and maturation of T-lymphocytes.

  1. One

  2. Two

  3. Three

  4. Four
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice zoology important and common human diseases allergy and autoimmune diseases allergy non infectious diseases

Which of the following is a cause of allergy which is stored in mast cells?

  1. Interferons

  2. Histamine

  3. Immunoglobulins

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Allergies are the reactions or the response given to the antigens which are in the form of particles. Allergy is also termed as hypersensitivity. The cells release IgE antibodies, histamines and other cytokines which manifest the symptoms of the reaction. When the allergen is encountered, the mast cells and basophils undergo degranulation which releases histamine. Histamine is the inflammatory agent. 

Thus, the correct answer is option B. 

Multiple choice zoology immune system allergy and autoimmune diseases allergy non infectious diseases

The immune system which works against self is

  1. Self immune system

  2. Autoimmunity

  3. Specific immunity

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Autoimmunity is the system of immune responses of an organism against its own cells and tissues. It is the abnormal immune response in which immune system attacks healthy cells.
Thus, the correct answer is option B.