Tag: bio-chemistry

Questions Related to bio-chemistry

Normal blood level of calcium in adults is

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. 20-30 mg/dl

  2. 15.5-20.0 mg/dl

  3. 8.5-10.5 mg/dl

  4. 5 mg/dl.

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Correct Option: C

In blood

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. WBCs are more than RBCs

  2. RBCs are more than WBCs

  3. RBCs are less than platelets

  4. Platelets are less than WBCs.

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Correct Option: B

Blue copper protein complex contained in some molluscs in their plasma for oxygen transport is?

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Haemocyanin

  2. Chlorocruorins

  3. Bilirubin

  4. Haemoglobin

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Correct Option: A

The waste matters (urea) are transported by

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Blood

  2. Lymph

  3. RBC

  4. None of the above

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Correct Option: A
Explanation:

Urea is synthesized in the liver from ammonia and carbon dioxide. The urea synthesis is a five-step cyclic process, with five distinctive enzymes. This urea is released into the bloodstream from the liver cells. Through blood, urea is transported to kidneys where the blood is filtered and urea is passed out of the body in the urine. Hence the waste matters (urea) are transported by the blood.

So, the correct answer is 'Blood'.

pH of blood in arteries and veins is

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Higher in arteries and lower in veins

  2. Higher in veins and lower in arteries

  3. Same

  4. Variable in both

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Correct Option: A
Explanation:
pH of blood in the arteries is greater than that of the veins as the venous blood contains dissolved $CO _2$, lactic acid and other metabolic waste that makes the venous blood more acidic.
So, the correct answer is 'Higher in arteries and lower in veins'

Blood does not contain

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Calcium

  2. Prothrombin

  3. Fibrinogen

  4. Elastin

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Correct Option: D
Explanation:

Blood clotting factors are needed for blood to clot (coagulation). Prothrombin is one of the clotting factors made by the liver. During normal blood coagulation, a coagulation cascade activates prothrombin by converting it into the serine protease thrombin. Thrombin then converts the soluble fibrinogen into insoluble fibrin strands. These strands are then cross-linked by factor XIII to form a blood clot. As soon as blood from a wound is exposed to the air, the platelets disintegrate and react with fibrinogen to create fibrin: a mass of tiny threads. This triggers a whole series of reactions that rely on adequate levels of calcium and vitamin K to work. Calcium is also an important part of the blood clotting process. Elastin is a highly elastic protein in connective tissue and allows many tissues in the body to resume their shape after stretching or contracting. It is not present in the blood.

Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F).
(i)    Expiration  is  normally  brought about by the relaxation of inspiratory muscles.
(ii)   Oxyhaemoglobin can hold much less carbon dioxide in the form of carbaminohaemoglobin than what deoxyhaemoglobincan.
(iii)  A person can expel air the air from the lungs by a forceful expiration.
(iv) A rise in $PCO _{2}$ increases the oxygen - affinity of haemoglobin.

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. (i)F (ii)F (iii)T(iv)F

  2. (i)T (ii)T(iii)F(iv)F

  3. (i)F (ii)T(iii)T(iv)F

  4. (i)T (ii)T(iii)T(iv)F

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Correct Option: B
Explanation:

A person cannot expel all the air from the lungs even after forceful expiration. The volume of air which remains in the lungs after the most forceful expiration is called residual volume, it is about 1100 mL to 1200 mL A rise in $PCO _{2}$ decreases the $O _{2}$ affinity of haemoglobin.

The term dynamic homeostasis refers to the fact that

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. Homeostatic mechanisms keep physiological responses from fluctuating.

  2. Homeostatic mechanisms allow for physiological responses to slightly fluctuate within a normal range.

  3. Homeostatic mechanisms keep fluctuations in physiological responses right at set point.

  4. Homeostatic mechanisms allow for large fluctuations that will reset the set point.

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Correct Option: A
Explanation:

The ability of the body to regulate its internal physiological processes in order to maintain the equilibrium is called the dynamic equilibrium. It is performed to keep the physiological responses from fluctuating with the external conditions of the environment. Different organ system work under the regulation of hypothalamus and medulla maintain the dynamic homeostasis. 

Hence, the correct answer is 'Homeostasis mechanisms keep physiological responses from fluctuating'

100 ml. of pure blood carries

bio-chemistry human body and organ system role of blood in transport function of blood blood and lymph body fluid

  1. 1.34 ml. O$ _2$

  2. 20 ml. O$ _2$

  3. 15 ml. O$ _2$

  4. 4 ml. O$ _2$

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Correct Option: B
Explanation:

The amount of oxygen in the blood is 20.8ml or 20.8 volume. Oxygen is carried in the blood in two forms: dissolved and bound to hemoglobin. 

Emulsification of fats is done by .... 

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. saliva

  2. gastric juice

  3. bile

  4. intestinal juice

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Correct Option: A