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 evs our body- its internal organ system innate and acquired immunity body fluids and immune responses immunity and immune system

Wandering cells are

  1. Histiocytes

  2. Mast cells

  3. Leukocytes

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The term wandering cell (or ameboid cell)[1] is used to describe cells that are found in connective tissue, but are not fixed in place. This term is used occasionally and usually refers to blood leukocytes (which are not fixed and organized in solid tissue) in particular mononuclear phagocytes.


So, the correct answer is 'Leukocytes'.

Multiple choice zoology frog circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system animal diversity - ii (phylum: chordata)

Compared to those of humans, erythrocytes of Frog are

  1. With nucleus but without haemoglobin

  2. Nucleated and with haemoglobin

  3. Smaller and fewer

  4. Without nucleus but with haemoglobin.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unlike human erythrocytes, which are non-nucleated, frog erythrocytes are nucleated and contain hemoglobin for oxygen transport.

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Which of the following diseases can be cured by stem cell therapy?

  1. Haematopoiesis

  2. Lymphoma

  3. Dwarfness

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

Stem cell therapy is currently used to treat various blood-related disorders, including lymphoma and leukemia, by replacing damaged cells. Haematopoiesis is a process, not a disease.

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Hematopoietic stem cell transplantation can be

  1. Autologous.

  2. Allogeneic.

  3. Syngeneic.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hematopoietic stem cells are obtained from the bone marrow and used for transplantation. There are different types of transplantations in which the donor from which the stem cells are received differs. In the case of the autologous stem cell transplantation, the stem cells are obtained from the same individual. In an allogeneic system, the stem cells can be obtained from any related or non-related person who is compatible with the patient. In the syngeneic stem cell transplantation, the stem cells are obtained from the identical twin.

Thus, the correct answer is option D. 

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Which of the following term is used when transplanted cells do not begin producing new cells as planned?

  1. Graft failure

  2. Anemia

  3. Mucositis

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The stem cell transplantation is the method which can be used for the treatment of many disorders like cancer, genetic defects, etc. The main complication of this method is graft rejection by the host. The graft may contain antigens which act as a foreign body in the host. The antibodies are produced against this organ which results in the rejection and destruction of the organ in the host. The rejection is also referred as graft failure. 

Thus, the correct answer is option A. 

Multiple choice bio-chemistry human body and organ system role of blood in transport function of blood body fluid

Blood is a ............... tissue.

  1. Connective

  2. eEpithelial

  3. mMuscular

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

Blood is a fluid connective tissue. Blood is considered a connective tissue for two basic reasons:- 

  1. Embryologically, it has the same origin (mesodermal) as do the other connective tissue.
  2. Blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.


So, the correct option is 'Connective'.

Multiple choice zoology aids to health body defense system drug-target interaction pharmaceutical products and drug action

Neutrophils and monocytes are important cells participating in

  1. Phagocytosis

  2. Perforin production

  3. Passive immunity

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

Phagocytes are cells that protect the body by ingesting harmful foreign particles, bacteria, and dead cells, thereby involving in the process of phagocytosis. They are essential for fighting infections and for subsequent immunity. The phagocytes include neutrophils and monocytes.
So, the correct answer is option A.

Multiple choice zoology diseases and immunity body defense system drug-target interaction pharmaceutical products and drug action

Phagocytes of innate immunity are

  1. Neutrophills

  2. Macrophages

  3. Monocytes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phagocytosis is the process of ingestion of extracellular particulate material from environment. It is conducted by some specialized cells called the phagocytes. The blood cells, monocytes, neutrophils and macrophages are all phagocytes. Hence, the correct answer is 'All of the above'.

Multiple choice zoology diseases and immunity body defense system drug-target interaction pharmaceutical products and drug action

Note the following.

(A) Skin, (B) Phagocytes, (C) B-cells, (D) Inflammation, (E) Antibodies, (F) T-cells, (G) Fever, (H) Complementary proteins, (I) NK-cells, (J) Secretions. 

Identify the factors involved in second line of defence.

  1. (B), (D), (G), (H), and (I)

  2. (B), (C), (E) and (I)

  3. (D), (F), (H) and (J)

  4. (C), (E), (G) and (H)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The second line of defense is the non-specific responses. They are generalized responses to pathogen infection, they do not target a specific cell type. The non-specific response consists of some WBCs and plasma proteins and the following factors:

1. Phagocytes are cells that eat foreign material to destroy them and it includes neutrophils and eosinophils.
2. Macrophages are non-phagocytic leucocytes, like basophils and mast cells.
3. Complement proteins is a plasma protein that is directly activated by the antigen.
4. Inflammation is the immune response shown during an infection. It is generally shown by WBC.

5. Fever is an immune response that includes the increase in the temperature of the body to kill pyrogens.

Thus, the correct answer is option A.

Multiple choice zoology diseases and immunity body defense system drug-target interaction pharmaceutical products and drug action

Which one of the following organs is not involved in the elicitation of immune responses?

  1. Spleen

  2. Thymus

  3. Lymph nodes

  4. Brain
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The immune response is how our body recognizes and defends itself against bacteria, viruses and other harmful diseases. They are also triggered by antigens. The parts involved in elicitation of immune responses are Spleen, thymus, lymph nodes, bone marrow and white blood cells.

So, the correct option is 'Brain'.

Multiple choice evolutionary changes in heart transportation - the circulatory system

Serum is

  1. Blood minus fibrinogen

  2. Lymph minus corpuscles

  3. Lymph

  4. Blood minus corpuscles and fibrinogen.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Serum is the liquid component of blood that remains after blood has clotted, meaning it lacks both blood cells (corpuscles) and clotting factors like fibrinogen.

Multiple choice parts of the digestive system digestive system of human human digestive system digestion and absorption biology nutrition deficiency diseases digestive system

Which of the following molecules is incorrectly paired with its source?

  1. Lysozyme-gastric juices

  2. Histamine-injured cells

  3. lnterferons-virus infected cells

  4. Immunoglobulins-plasma cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Histamine is an organic nitrogenous compound involved in local immune responses, as well as regulating physiological function in the gut and acting as a neurotransmitter for the brain, spinal cord, and uterus. Histamine is involved in the inflammatory response and has a central role as a mediator of itching. 

Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of several viruses. In a typical scenario, a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defenses.
Immunoglobulins, also known as antibodies, are glycoprotein molecules produced by plasma cells (white blood cells). 
Lysozyme is a special enzyme found in tears, saliva, sweat, and other body fluids. Other mucosal linings, such as the nasal cavity, also contain lysozyme. It destroys bacteria that attempt to enter our body through these passageways. In the case of tears, they protect our eyes from bacterial invaders.

So, the correct option is 'Option A'.

Multiple choice biology transportation in plants and animals blood transfusion transfusion of blood blood and organ donation

Which blood group an safely be transfused in emergency when there is no time to analyse the blood group of recipient?

  1. O and $Rh^-$
  2. O and $Rh^+$
  3. B and $Rh^-$
  4. AB and $Rh^+$.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Individuals with type O blood do not produce ABO antigens.  Therefore, their blood normally will not be rejected when it is given to others with different ABO types.  As a result, type O people are universal donors for transfusions, but they can receive only type O blood themselves.

So, the correct option is O and Rh-.'.