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Biology
Body Fluids and Circulation
83 questions from 38 papers, each with its answer.
- 83 questions
- 38 papers
- 2.35% of Biology
Electrocardiograph (ECG)
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Match List-I with List-II.
Pick the matching item from Column II for each row.
Column I
- A. P-wave
- B. Q-wave
- C. QRS complex
- D. T-wave
Column II
- I. Beginning of systole
- II. Repolarisation of ventricles
- III. Depolarisation of atria
- IV. Depolarisation of ventricles
Correct answer: A → III, B → I, C → IV, D → II
The P-wave is atrial depolarisation, QRS is ventricular depolarisation and the T-wave is ventricular repolarisation.
In an ECG record, three recognisable waves (P-wave, QRS complex and T-wave) appear with each heartbeat. P-wave – represents atrial depolarisation. QRS complex – represents ventricular depolarisation. T-wave – represents ventricular repolarisation. Q-wave – represents initial phase of ventricular depolarisation i.e., beginning of systole.
Blood – Formed Elements (WBCs)
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Which of the following statements are correct? A. Basophils are most abundant cell of the total WBCs B. Basophils secrete histamine, serotonin and heparin C. Basophils are involved in inflammatory response D. Basophils have kidney shaped nucleus E. Basophil are agranulocyte Choose the correct answer from the options given below:
Basophils are the least abundant WBCs and are granulocytes that secrete histamine, serotonin and heparin.
Neutrophils are the most abundant cells (60–65%) of the total WBCs and basophils are the least (0.5–1%). Basophils have S-shaped nucleus. Neutrophils, eosinophils and basophils are different types of granulocytes.
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