Tag: biology

Questions Related to biology

Which vertebrate organ receives only oxygenated blood?

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

  1. Gill

  2. Liver

  3. Lung

  4. Spleen

Show answer
Correct Option: D

Cords of Billroth are blood spaces found in

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

  1. Spleen

  2. Tonsils

  3. Liver

  4. Kidneys.

Show answer
Correct Option: A

Which organ receives only oxygenated blood?

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

  1. Gill

  2. Spleen

  3. Lung

  4. Liver.

Show answer
Correct Option: B

Lymph

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

  1. Transports $O _2$ to brain

  2. Transports $CO _2$ to lungs

  3. Returns interstitial fluid to blood

  4. Returns RBCs and WBCs to lymph nodes

Show answer
Correct Option: C
Explanation:
Lymph is a fluid connective tissue that contains plasma and WBCs (mostly lymphocytes). It lacks RBCs and contains more WBCs and proteins. It is colourless and contains very small amount of nutrients and oxygen. It is known as middle man of the body. Its function is to return the interstitial fluid and proteins back to the blood.
So, the correct answer is 'Return interstitial fluid to the blood'.

Lymph is colourless because

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

  1. WBC are absent

  2. WBC are present

  3. Haemoglobin is absent

  4. RBC are absent

Show answer
Correct Option: D
Explanation:
  • Lymph is the part of the lymphatic system, which is a colourless watery fluid which contains lymphocytes and proteins.
  • They are colourless because they lack red blood cells. 
  • The red blood cells contain haemoglobin protein which gives a red colour to the blood. So, the correct answer is 'RBC are absent'.

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.

Show answer
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

Show answer
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.

Show answer
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.