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 human system human lymphatic system lymph and its function lymph and tissue fluid

In the animal body blood bank is

  1. Heart

  2. Spleen

  3. Lungs

  4. Liver
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The spleen plays important roles in regard to red blood cells and the immune system. It removes old red blood cells and holds a reserve of blood, which can be valuable in case of hemorrhagic shock, blood loss and also recycles iron. It purifies the blood and helps the immune system to recognize and attack foreign antibodies and disease. The spleen is composed of the red and white pulp. The white pulp produces and grows immune cell as well as blood cells. On the other hand, the red pulp is responsible for purifying the blood and removing dead or old blood cells.

Multiple choice biology human system human lymphatic system lymph and its function lymph and tissue fluid

Lymph lacks

  1. WBC

  2. RBC

  3. Tissue fluid

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

The lymphatic system returns excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 percent is returned. The 10 percent that does not return becomes part of the interstitial fluid that surrounds the tissue cells. It helps in exchange of gasses, nutrients and removes the metabolic waste. It is devoid of RBC. So, the correct answer is option B.

Multiple choice biology human system human lymphatic system lymph and its function lymph and tissue fluid

Lymph contains ........... proteins than plasma.

  1. Less

  2. More

  3. Equal

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

The lymphatic system returns excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 percent is returned. The 10 percent that does not return becomes part of the interstitial fluid that surrounds the tissue cells. It helps in exchange of gasses, nutrients and removes the metabolic waste. It is devoid of RBC. It contains fewer proteins than plasma and lacks RBC.  So, the correct answer is option A.

Multiple choice biology human system human lymphatic system lymph and its function lymph and tissue fluid

Lymph provides immunity because

  1. It has lymphocytes

  2. It has erythrocytes

  3. It has thromobocytes

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

WBCs are divided into leucocytes and lymphocytes. Lymphocytes are further divided into macrophages and monocytes. These cells help in the engulfment of any foreign particles inhaled or ingested by our body. Lymphocytes are considered as soldier cells of our body. A Large proportion of these cells is found in the lymphatic system wherein the lymph is present. Thus lymph provides immunity. So, the correct answer is option A.

Multiple choice biology human system human lymphatic system lymph and its function lymph and tissue fluid

Which of the following acts as middle man?

  1. W.B.C.

  2. Plasma

  3. Blood

  4. Lymph
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
As the blood passes through the capillaries in tissues, some water along with many small water-soluble substances move out into the spaces between the cells of tissues leaving the larger proteins and most of the formed elements (RBC, WBC and Platelets) in the blood vessels. This fluid released out is called the interstitial fluid or tissue fluid. It has the same mineral distribution as that in plasma. Exchange of nutrients, gases, etc., between the blood and the cells, always occur through this fluid. An elaborate network of vessels called the lymphatic system collects this fluid and drains it back to the major veins. The fluid present in the lymphatic system is called the lymph. Hence lymph acts as the middleman.
So, the correct answer is 'Lymph'.
Multiple choice biology health and diseases non-infectious diseases non infectious diseases categories of diseases

Which of the following changes would you find in the disease polycythemia?

  1. Increase in total WBCs

  2. Decrease in total RBCs

  3. Increase in total RBCs

  4. Decrease in total WBCs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Polycythemia is a disease state in which the hematocrit (the volume % of RBC in the Blood) is elevated.It can be due to an increase in the number of RBC ("absolute polycythemia") or to a decrease in the volume of plasma ("relative polycythemia").

So, he correct option is C. ( Increase in total RBC )

Multiple choice biology health and diseases non-infectious diseases non infectious diseases categories of diseases

Cancerous cells spread through

  1. Blood

  2. Lymph

  3. Secondary growths of malignant tumour

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

Cancerous cells spread to other parts of the body as it is able to break away from the original (primary) tumour and get into the bloodstream or lymph system, which can carry them to another part of the body. Cancerous cells also spread through metastasis. Metastasis is the development of secondary malignant growths at a distance from a primary site of cancer. When tumour cells metastasize, the new tumour is called a secondary or a metastatic tumour, and its cells are similar to those in the original or primary tumour.

So, the correct answer is 'All of the above'.

Multiple choice innate and learned behaviour option a: neurobiology and behaviour biology

Alcoholics have reduced number of

  1. Erythrocytes

  2. Leucocytes

  3. Blood platelets

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Alcohol decreases the blood supply to bone marrow, the part of body where blood cells are formed. It also causes decrease in absorption  of nutrients in the body from the food. Nutrients like zinc, folic acid, iron etc. are required for formation of blood cells. Deficiency of these nutrients due to alcohol cause decline in red blood cells (erythrocytes). white blood cells (leucocytes) and platelets. This also leads to anaemia in alcoholic persons. Hence, all options are correct.
So, the correct answer is 'All of the above'.
Multiple choice biology cell biology and biotechnology organ donation and body donation blood and organ donation stem cell

During injury mast cells secrete 

  1. Histamine

  2. Heparin

  3. Prothrombin

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

the mast cells of injured tissue secrete histamine, which causes the surrounding blood vessels to dilate and increase the permeability. It gives local immune response and act as neurotransmitter.
Thus, the correct answer is option A.

Multiple choice biology cell biology and biotechnology organ donation and body donation blood and organ donation stem cell

Allogeneic transplants require immunosuppressant drugs because these are transplants between

  1. Genetically different members of the same species.

  2. Genetically different members of different species.

  3. Genetically similar members of the same species.

  4. Genetically similar members of the different species.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A- Allogenic transplant takes place between genetically different members of same species. Immunosuppressant drugs are used to suppress graft-versus-host disease (GVHD) which is the result of an intricate immune response following allogeneic stimuli due to allogenic transplant.

Multiple choice biology transport in mammals blood and its components components of blood composition of blood

Which of the following are the constituents of blood?

  1. Mucus

  2. Plasma

  3. Lymph

  4. Bile
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plasma circulates dissolved nutrients, such as glucose, amino acids, and fatty acids (dissolved in the blood or bound to plasma proteins), and removes waste products, such as carbon dioxide, urea, and lactic acid.

So, the correct option is 'Plasma'.