Tag: soldiers of defense

Questions Related to soldiers of defense

Choose the correct answer from the alternatives given.
The lymph consists of:

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

  1. plasma

  2. leucocytes

  3. plasma and leucocytes

  4. plasma and erythrocytes

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Correct Option: C
Explanation:

  • Lymph is a fluid which flows through the lymphatic system of the body and takes part in transportation. Lymph is formed by the seepage of blood plasma, proteins, and few blood cells through the pores of capillaries.
  • Lymph transports protein, fats and other nutrients from the digestive system. Lymph also collects bacteria and other pathogens from the bloodstream and brings to the lymph nodes to destroy them. Lymph mainly contains blood plasma with some white blood cells.
So, the correct option is 'Plasma and leucocytes'.

Which is NOT the function of lymph?

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

  1. Transport R.B.C.s

  2. Drain excess tissue fluid

  3. Transport lymphocyte and antibodies

  4. Transport absorbed fat

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Correct Option: A

In a resting person, the saturation level of haemoglobin as blood leaves the tissue capillaries is approximately

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. 75%

  2. 40%

  3. 3%

  4. 46%

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Correct Option: A
Explanation:

The relationship between oxygen levels and hemoglobin saturation is indicated by the oxygen-hemoglobin dissociation (saturation) curve at high partial pressures of O2 (above about 40 mm Hg), hemoglobin saturation remains rather high (typically about 75 - 80%). This rather flat section of the oxygen-hemoglobin dissociation curve is called the 'plateau'. 40 mm Hg is the typical partial pressure of oxygen in the cells of the body. Examination of the oxygen-hemoglobin dissociation curve reveals that, under resting conditions, only about 20 - 25% of hemoglobin molecules give up oxygen in the systemic capillaries. This is significant (in other words, the 'plateau' is significant) because it means that you have a substantial reserve of oxygen. In other words, if you become more active, & your cells need more oxygen, the blood (hemoglobin molecules) has lots of oxygen to provide When you do become more active, partial pressures of oxygen in your (active) cells may drop well below 40 mm Hg.

So, the correct option is '75%'.

Which one of the following is not related to the clotting of blood?

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. Fibrin

  2. Fibrinogen

  3. Ca++

  4. Na+ of the plasma

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Correct Option: D

The process of blood clot formation within the circulatory system is

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. Thrombosis

  2. Thrombocytes

  3. Thrombin

  4. Thrombocytopenia

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Correct Option: A
Explanation:

Thrombosis is the formation of a blood clot inside a blood vessel, obstructing the flow of the blood through the circulatory system.
Thrombocytes are also called 'platelets' and these are the blood cells, whose function is to stop bleeding.
Thrombin is the enzyme that converts fibrinogen to fibrin, and a reaction that leads to the formation of fibrin clot.
Thrombocytopenia is the disorder in which there is an abnormally low amount of platelets.
Thus, the correct answer is option (A).

Platelets are a source of ______________.

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. Fibrinogen

  2. Calcium

  3. Thromboplastin

  4. Haemoglobin

Show answer
Correct Option: C
Explanation:

Thromboplastin is a plasma protein aiding blood coagulation through catalyzing the conversion of prothrombin to thrombin. It is a complex enzyme that is found in brain, lung, and other tissues and especially in blood platelets and that functions in the conversion of prothrombin to thrombin in the clotting of blood—called also thrombokinase.


So, the correct answer is 'Thromboplastin'.

Blood clotting vitamin is?

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. A

  2. $B _6$

  3. $B _{12}$

  4. K

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Correct Option: D
Explanation:

Vitamin K plays a key role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2


So, the correct answer is 'K'.

When whole blood is stored with an anticoagulant at $4^oC$, the K+ ions move out from the RBC into the plasma. The most likely reasons for this is that

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. RBC haemolyses and hence leakage of K+ ions

  2. K+ ions become more mobile at $4^oC$

  3. Active transport ceases resulting in ionic equilibrium

  4. The anticoagulant attracts the K+ ions into the plasma

Show answer
Correct Option: B

Which of the following statements are correct?


(i) $Ca^{+2}$ is necessary for blood coagulation.
(ii)Coagulation in blood vessel is prevented during normal condition by heparin.
(iii)Clotting of blood involves changes of fibrinogen to fibrin by thrombin.
(iv)Blood clotting involves cascading process involving a number of factors present always in the active form.

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. (i), (iii) and (iv)

  2. (ii) and (iv)

  3. (i)  and (iii)

  4. (iii) and (iv)

Show answer
Correct Option: C
Explanation:

Ca${+2}$ is necessary for blood coagulation -

1. Conversion of prothrombin to thrombin, in presence of prothrombin activator and Ca${+2)$
2. Conversion of fibrinogen monomers in to fibrin fibres  
III fibrinogen is thin soluable protein that is converted to insoluable protein fibres by thrombin
So, the correct answer is 'i and iii'

Identify $A,B$ and $C$ in the given blood clotting process.
Damage platelets release $A$;$A$ converts $D$ into $B$ in presence of Calcium ions. $B$ converts $C$ into Fibrin thread.

biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

  1. A-Thromboplastin,B-Prothrombin,C-Fibrinogen

  2. A-Thrombin,B-Fibrinogen,C-Thrombo-kinase

  3. A-Thromboplastin,B-Thrombin,C-Fibrinogen

  4. A-Prothrombin,B-Thrombin,C-Fibrinogen

Show answer
Correct Option: A