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 Multiple Choice QuestionsMultiple Choice Questions

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201.

Assertion: WBCs accumulate at the site of wounds by diapedesis.

Reason : It is the squeezing of leucocytes from
the endothelium.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both the assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


B.

If both the assertion and reason are true but reason is not the correct explanation of assertion.

During a wound, germs are removed by the process of phagocytosis by WBCs. WBCs or whit Blood Cells accumulate at the site of wound by diapedesis. Diapedesis is the squeezing of leucocytes out from the endothelium of capillaries to fight against foreign agent.


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202.

Assertion : The regulation of RBC production is accompanied by the kidneys.

Reason : Erythropoietin hormone circulates to the red bone marrow, where it increases stem cell mitosis and speeds up the development of RBCs.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both the assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


203.

A human RBC is placed in 1.5% salt solution. It will

  • swell up

  • shrink

  • remain unaffected

  • burst


204.

All veins carry deoxygenated blood except

  • pulmonary vein

  • hepatic vein

  • hepatic portal vein

  • renal vein


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205.

Which of the following is wrongly matched?

  • Haemoglobin in mammals - RBC

  • Haemozoin - Plasmodium cytoplasm

  • Haemocyanin- prawn

  • Haemoglobin dissolved in blood - Pheretima


206.

Choose the wrong statement

  • Solubility of CO2 in blood is 20-25 times higher than that of O2

  • The total volume of air accommodated in the lungs at the end of a forced inspiration is called the vital capacity

  • O2 can bind with haemoglobin in a reversible manner to form oxyhaemoglobin

  • Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli

  • Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli


207.

What is the pO2 and pCO2 in the systemic arteries?

  • pO2 40 mm Hg; pCO2 45 mm Hg

  • pO2 95 mmHg; pCO2 104 mm Hg

  • pO2 95 mm Hg; pCO2 40 mm Hg

  • pO2 45 mm Hg; pCO2 40 mm Hg

  • pO2 45 mm Hg; pCO2 40 mm Hg


208.

Identify the correct statement regarding cardiac activity

  • Normal activities of the human heart is regulated intrinsically hence it is neurogenic

  • A special neural centre in the medulla oblongata can moderate the cardiac function through the CNS

  • Parasympathetic neural signals increase the rate of heart beat

  • Adrenal medullary hormones can increase cardiac output

  • Adrenal medullary hormones can increase cardiac output


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209.

Three alleles namely IA, IB and i control the blood grouping in human beings. How many different genotypes are likely to be present in the human population?

  • 2

  • 4

  • 5

  • 6

  • 6


210.

Choose the correct statement among the following

  • Atrio-ventricular node is the pace maker that generates action potential and initiates the atrial systole

  • During each cardiac cycle, the 'lub' sound is due to the closure of semilunar valves

  • Stroke volume in each cardiac cycle is approximately 170 ml of blood

  • QRS complex in an ECG indicates depolarisation of ventricles

  • QRS complex in an ECG indicates depolarisation of ventricles


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