Tag: soldiers of defense

Questions Related to soldiers of defense

Middle man of the body is

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

  1. Plasma

  2. Lymph

  3. WBC

  4. RBC

Show answer
Correct Option: B
Explanation:
Lymph is a mobile connective tissue and composed of white blood cells mostly lymphocytes, and, the lymph plasma. It is similar to blood but it has less proteins, calcium and phosphorus. Glucose level is high in lymph. It is formed in lymph nodes, liver, thymus, tonsils, spleen and peyers patches with liver being the largest producer. It acts as middle man of body. It transports oxygen, food materials, hormones etc. to body cells and brings metabolic wastes like carbon dioxide from the body cells to blood which are finally poured into the venous system. In this way, it mediates the exchange and hence, known as middle man of the body.
So, the correct answer is 'Lymph'.

Important function of lymph is

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

  1. Transport oxygen to brain

  2. Transport $CO _2$ to lungs

  3. Return RBCs to lymph nodes

  4. Return interstitial fluid to blood.

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Correct Option: D

Which one is called graveyard of RBC's?

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

  1. Liver

  2. Kidney

  3. Heart

  4. Spleen

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Correct Option: D
Explanation:
Spleen is called the graveyard of RBCs because after completion of lifespan, RBCs are destroyed in spleen where they are ingested by free macrophages. About 2.5 million of RBCs are destructed in one second. After ingestion of RBCs by macrophages, the haemoglobin is dissociated into haem and globin. Iron of haem is released which is further used in process of formation of blood. The haem is converted into bilirubin, a yellow or brown pigment.
So, the correct answer is 'Spleen'.

Which is not the function of lymph

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

  1. Transport of RBCs

  2. Drain excess tissue fluid

  3. Transport of lymphocytes and antibodies

  4. Transport of absorbed fat.

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Correct Option: A

Which of the following is blood bank of the body or reservoir, where the blood is stored and can be mobilized?

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

  1. Heart

  2. Liver

  3. Bone marrow

  4. Spleen

Show answer
Correct Option: D
Explanation:
The spleen is an organ in the upper far left part of the abdomen, to the left of the stomach. It’s commonly fist-shaped, purple, and about 4 inches long.
It is known as the blood bank because its blood reserve can be valuable in case of hemorrhagic shocks. 
It acts as a filter for blood as part of the immune system. Old red blood cells are recycled in the spleen, and platelets and white blood cells are stored there. The spleen also helps fight certain kinds of bacteria that cause pneumonia and meningitis. Hence, the correct answer is option D.

Amount of blood which can be stored in spleen is

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

  1. 200 ml

  2. 100 ml

  3. 50 ml

  4. None of the above

Show answer
Correct Option: A
Explanation:
The spleen is the largest lymphoid organ which is located under the ribcage and above the stomach in the abdomen. On an average, an adult human body contains 5.6 liters of blood out of which nearly 200ml blood can be stored in the spleen and released in cases of hypovolemia(low blood volume) and hypoxia (low oxygen levels). 
So, the correct answer is ' 200ml '.

Choose the correct answer from the alternatives given.
The cells constituting walls of blood capillaries are known as:

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

  1. endothelial cells

  2. cords

  3. oxyntic cells

  4. plasma cells

Show answer
Correct Option: A
Explanation:

The endothelial cells form a one-cell-thick walled layer called endothelium that lines all of our blood vessels such as arteries, arterioles, venules, veins, and capillaries. Smooth muscle cells layer beneath the endothelial cells. 

The primary function of endothelium is the maintenance of vessel wall permeability and regulating blood flow. 
So, the correct option is 'Endothelial cells'.

Cords of billroth are found in

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

  1. Liver

  2. Kidneys

  3. Spleen

  4. Tonsils

Show answer
Correct Option: C
Explanation:

The Cords of Billroth (also known as splenic cords or red pulp cords) are found in the red pulp of the spleen between the sinusoids, consisting of fibrils and connective tissue cells with a large population of monocytes and macrophages. These cords contain half of the human body's monocytes as a reserve so that after tissue injury these monocytes can move in and aid locally sourced monocytes in wound healing.

Splenic artery arises from 

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

  1. Anterior mesenteric artery

  2. Coeliac artery

  3. Posterior mesenteric artery

  4. Intestinal artery

Show answer
Correct Option: B
Explanation:

The splenic artery supplying the organ spleen is the branch of the coeliac artery which itself is a branch of the abdominal aorta. The abdominal aorta is a branch of dorsal aorta/systemic aorta.

Dorsal aorta > Abdominal segmental aorta > Coeliac artery > Splenic artery.
So, the correct answer to the question is 'Coeliac artery'.

Solid substances constitute ____ % of the non-cellular part of lymph.

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

  1. $34$%

  2. $6$%

  3. $12$%

  4. $82$%

Show answer
Correct Option: B
Explanation:

Non-cellular part; water - 94%
Solids (proteins, fats, carbohydrates, enzymes, antibodies etc) - 6%.