Tag: biology

Questions Related to biology

Granulocytes are formed inside _____________.

production of blood cells body fluids and circulation biology

  1. Liver

  2. Red bone marrow

  3. Kidney

  4. Small intestine

Show answer
Correct Option: B
Explanation:

Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm. Granulocytes are produced via granulopoiesis in the bone marrow.


So, the correct answer is 'Red bone marrow'.

Red blood cells are produced$/$  erythropoiesis occurs in _____________.

production of blood cells body fluids and circulation biology

  1. Bone marrow

  2. Spleen

  3. Liver

  4. Thymus

Show answer
Correct Option: A
Explanation:

Erythropoiesis is the process which produces red blood cells, which is the development from erythropoietic stem cell to mature red blood cell. this usually occurs within the red bone marrow. In the early fetus, erythropoiesis takes place in the mesodermal cells of the yolk sac. By the third or fourth month, erythropoiesis moves to the liver. After seven months, erythropoiesis occurs in the bone marrow.


So, the correct answer is 'Bone marrow'.

Highly Haematopoietic organs in embryo are ___________.

production of blood cells body fluids and circulation biology

  1. Spleen

  2. Lymph-nodes

  3. Bone -marrow

  4. All

Show answer
Correct Option: D
Explanation:

Hematopoiesis is the formation of blood cellular components. In developing embryo, blood formation occurs in aggregates of blood cells in the yolk sac called, blood islands. As development progresses, blood formation occurs in the spleen, lymph nodes, and liver. 


So the answer is "All"

Both erythrocytes and leucocytes are formed in ___________.

production of blood cells body fluids and circulation biology

  1. Thymus

  2. Bone marrow

  3. Arterial walls

  4. Lymph nodes

Show answer
Correct Option: B
Explanation:

Red blood cells, most white blood cells, and platelets are produced in the bone marrow, the soft fatty tissue inside bone cavities


So, the correct answer is 'Bone marrow'.

Platelet plug is associated with.

production of blood cells body fluids and circulation biology

  1. Clot retraction

  2. Haemostasis

  3. Fibrin formation

  4. Homoeostasis

Show answer
Correct Option: B
Explanation:

The platelet plug, also known as the hemostatic plug or platelet thrombus, is an aggregation of platelets formed during the earlier stage of hemostasis in response to blood vessel wall injury.  After platelets are recruited and begin to accumulate around the breakage, their “sticky” nature allows them to adhere to each other. This forms a platelet plug, which prevents more blood from leaving the body as well as any outside contaminants from getting in. The plug provides a temporary blockage of the break in the vasculature. As such, platelet plug formation occurs after vasoconstriction of the blood vessels but before the creation of the fibrin mesh clot, which is the more permanent solution to the injury. The result of the platelet plug formation is the coagulation of blood. It can also be referred to as primary hemostasis.


So, the correct answer is 'Haemostasis'.

Bone marrow of long bones are the sites of 

production of blood cells body fluids and circulation biology

  1. Production of WBC's

  2. Production of RBC's

  3. Production of blood

  4. Breakdown of RBC's

Show answer
Correct Option: B
Explanation:

A) There are two types of white blood cells, T and B cells (lymphocytes). T cells are produced and mature in the thymus gland while B cells are produced and mature in the bone marrow.
B) RBCs are produced in the bone marrow.
C) RBCs, some WBCs, and platelets are formed in the bone marrow, but the plasma is not formed in the bone marrow.
D) Old or damaged RBCs are broken down by macrophages in the spleen and liver.
So the correct answer is 'Production of RBC's'.

Formation of red blood is called _____________.

production of blood cells body fluids and circulation biology

  1. Haemocytosis

  2. Haemolysis

  3. Haemopoiesis

  4. Haemocytolysis

Show answer
Correct Option: C
Explanation:

Blood cell formation also called Hematopoiesis, or Hemopoiesis is a continuous process by which the cellular constituents of blood are replenished as needed. It occurs in the bone marrow.


So, the correct answer is 'Haemopoiesis'.

Formation of blood corpuscles is known as

production of blood cells body fluids and circulation biology

  1. Haemolysis

  2. Rouleaux

  3. Haemopoiesis

  4. Phagocytosis

Show answer
Correct Option: C
Explanation:
Haemopoiesis is the formation of cellular components of blood (i.e. blood cells) which are derived from haematopoietic stem cells (HSC). These cells are present in the medulla of bone marrow and have the capability of self renewal. They differentiate into blood cells and some of the daughter cells remain as HSCs and thus, it's a never ending process. In foetus, this process takes place in liver whereas after birth, it occurs in bone marrow.
So, the correct answer is 'Haemopoiesis'.

Which of the following cells are derived from myeloid progenitors?

production of blood cells body fluids and circulation biology

  1. Macrophages

  2. Megakaryocytes

  3. Granulocyte

  4. All of the above

Show answer
Correct Option: D
Explanation:
Hematopoietic stem cells of bone marrow give rise to myeloid and lymphoid progenitor cells.  Myeloid progenitor cells include macrophages, megakaryocytes, granulocytes, platelets, and erythrocytes. Thus the correct answer is option D.

Blood bank of human body is

production of blood cells body fluids and circulation biology

  1. Spleen

  2. Liver

  3. Bone

  4. Kidney

Show answer
Correct Option: A
Explanation:

Spleen is the blood bank of human body as it has the capacity to store considerable amount blood, that can be released in a situation of emergency (about a cup).

So, the correct answer is 'Spleen'