Biology

Human Immunity and Blood

2,051 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 soldiers of defense human lymphatic system lymph and its function lymph and tissue fluid

Which of the following statements is true for lymph?

  1. WBCs + serum

  2. Blood - RBCs and some proteins

  3. RBCs + WBCs + plasma

  4. RBCs + proteins + platelets
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lymph has a pale yellow colour due to absence of RBCs and platelets,  it has abundance of WBCs, Lymphocytes, carbohydrates, proteins, fats and nitrogenous waste.

So, the correct answer is 'WBCs + serum'

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

Lymph is

  1. Blood minus R.B.C

  2. Blood minus W.B.C

  3. Blood minus cells

  4. Plasma minus protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lymph is a liquid made up of plasma, WBCs, clotting factors but does not contain RBCs and form a system in a body known as lymphatic system and flows in lymph capillaries. It transports fatty acid in the form of chyle through the digestive system and WBCs through lymph nodes to bones.

So the correct option is 'Blood minus R.B.C.'

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

Which of the following cells of connective tissue is/are absent in blood and lymph?

  1. Antibody secreting cells

  2. Phagocytic cells

  3. Histamine secreting cells

  4. Fibre secreting cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood and lymph are specialized connective tissues. They lack the fiber-secreting cells (fibroblasts) found in other connective tissues because they are fluid and do not require a structural matrix of fibers.

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

Compared to blood our lymph has?

  1. Neutrophils more

  2. Soluble protein in large amount

  3. Clotting time more

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

Lymph is essentially blood plasma minus most of the larger proteins, but it has a different composition of cells and clotting factors. Because lymph lacks many of the clotting factors and platelets found in whole blood, its clotting time is significantly longer than that of blood.

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

One of the difference between blood and lymph is that

  1. Blood has RBCs and WBCs while lymph has lymphocytes.

  2. Blood has RBCs while lymph has no WBCs.

  3. Blood has WBCs while lymph has RBCs.

  4. Blood has dissolved organic salts while lymph has no such inorganic salt.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood is red in colour due to presence of RBCs. Blood plasma contains RBCs, WBCs and platelets. It can clot due to presence of more amount of fibrinogen. Lymphs are colourless due to absence of RBCs. The lymph plasma contains WBCs and lymphocytes. It contains diffusible proteins. It clots slowly due to presence of less fibrinogen.

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

Blood is stored in

  1. Lymph

  2. Kidney

  3. Spleen

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

The spleen is a brownish fist-sized organ located in the upper left side of the abdomen, tucked into a space between the stomach, pancreas and left kidney. It’s one of those organs that people know about, but aren’t sure what it does. Essentially, the spleen is a storage container and filter for blood, though it is part of the lymphatic system. In fact, it’s the largest lymph node in the body. One of its tasks is to remove harmful bacteria and viruses in the blood stream. Its other major task is removing or storing certain blood cells. Blood is not stored in heart, kidney and lymph. Thus, option C is correct.

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

The graveyard of RBC is

  1. Liver

  2. Gall bladder

  3. Bone marrow

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

Spleen is one of the most important organ of the body. Here are few of its functions
1) In fetal and some part of the neonatal period the spleen works not only as the storehouse of red blood cells or RBCs , but also is one of the important organ for hematopoiesis I.e., the formation of new RBCs. 
2) It also acts as a storehouse of various types of white blood cells or WBCs which are used to fight against various infections like pneumococcus, meningococcus etc.
3) It is also known as graveyard of RBC as old and damaged RBC are destroyed in spleen. 

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

A malfunction of the lymph nodes would most likely interfere with the

  1. Release of carbon dioxide into the lymph.

  2. Filtering of glucose from the lymph.

  3. Release of oxygen into the lymph.

  4. Filtering of bacteria from the lymph.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The lymphatic system not only regulates fluid amounts in the blood but also helps to fight infection. The lymph nodes located throughout our bodies, produce white blood cells and filter harmful bacteria, which is why they tend to enlarge when we have an infection.
Therefore, the correct answer is option D.
Multiple choice biology soldiers of defense human lymphatic system lymph and its function lymph and tissue fluid

Which of the following is not a function of spleen?

  1. It produces lymphocytes

  2. It destroys worn out RBCs, so also known as graveyard of RBCs

  3. In an embryo, it produces RBCs

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Functions:- 
1. It acts like a blood reservoir. In an emergency such as haemorrhage, physical or emotional stress, or in carbon monoxide poisoning, the spleen releases the stored blood into the blood stream.
2. It produces lymphocytes.
3. It destroys worn out RBC, so also known as graveyard of RBC.
4. In an embryo it produces RBC.

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

Which of the following are circulating fluids of the body?


a) Blood         b) Hormones       c) Lymph

  1. a, b

  2. b, c

  3. a, c

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

All such functions that need transport are performed by the two circulating fluids the blood and the lymph. Beside transport, These fluids has some other functions also.

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

Which of the following has the similar composition as lymph?

  1. Red blood cells

  2. Blood plasma

  3. White blood cells

  4. Nutrients

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lymph is the interstitial fluid present in the tissue space and it has accumulated due to the pressure difference between the arteries and the veins. It has a composition similar to that of the blood plasma, that it contains small solutes, water ions, proteins lymphocytes etc.

A. Red blood cells are the formed elements, containing the respiratory pigment called haemoglobin.
B. Blood plasma is the fluid part of the blood, whose composition is similar to that of the blood.
C. White blood cells are the formed elements involved in the immunity.
D. Nutrients are the food ingredients.
Hence, the correct answer is 'Blood Plasma'