Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

Which of the following cations is required for the conversion of prothrombin into active thrombin by thromboplastin? (a) Cu2+ (b) Fe3+ (c) Fe2+ (d) Ca2+

Ruhul Amin Alig

NEET 2021

Erythropoietin hormone which stimulates R.B.C. formation is produced by : (1) Alpha cells of pancreas (2) The cells of rostral adenohypophysis (3) The cells of bone marrow (4) Juxtaglomerular cells of the kidney [ NEET 2021 ]

Ruhul Amin Alig

Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

Read the following statements and select the correct option. (i) Carbonic anhydrase is present in the erythrocytes . (ii) In erythrocytes the carbon dioxide combine with water and is transported.

Ruhul Amin Alig

Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

Which of the following statements are true/false? (i) The blood transports CO2 comparatively easily because of its higher solubility. (ii) Approximately 8 -.9% of CO2 is transported being dissolved in the plasma of blood. (iii) The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3 (iv) The oxyhaemoglobin (HbO2 ) of the erythrocytes is basic. (v) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.

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Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

Mark the correct option for the labelled parts A, B and C A B C 1. Depolarization- Hyperpolarization- Repolarization 2. Repolarization- Hyperpolarization- Depolarization 3. Depolarization- Repolarization- Hyperpolarization 4. Thresholdstimulus- Repolarization- Hyperpolarization

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Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non - functional, what will be the immediate effect? (a) The flow of blood into the aorta will be slowed down. (b) The ‘pacemaker’ will stop working. (c) The blood will tend to flow back into the left atrium. (d) The flow of blood into the pulmonary artery will be reduced.

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Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of (a) Atrioventricular bundle (b) Purkinje system (c) Sinuatrial node (d) Atrioventricular node

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Class 12 | Biology | chapter 10 | Microbes in Human Welfare

Clot buster agent streptokinase is produced by (1) Streptococcus (2) Trichoderma (3) Clostridium (4) AspergilluS

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Class 11 | Biology | Chapter 18 | Body Fluids and Circulation

Combine chapters NEET Test -V MCQs*

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