Class 10/Specimen Paper
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
BioNotesBioNotesCreated by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
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ICSE Suggested Specimen Paper Based Preparation Guide
Why do athletes often train at high altitudes to improve their performance?
A person with blood type A can safely receive a blood transfusion from a person with blood type O, but not from a person with blood type B. Explain why.
Odd One Out: Aorta, Vena Cava, Pulmonary Artery, Hepatic Portal Vein.
Scenario: The valves in a person's leg veins are faulty and do not close properly. What would be a likely consequence of this condition?
Atherosclerosis and Heart Attacks
Atherosclerosis is a condition where plaque (made of fat, cholesterol, and other substances) builds up inside the arteries, causing them to narrow and harden. The coronary arteries, which supply oxygen-rich blood to the heart muscle itself, are often affected. If a piece of this plaque ruptures, a blood clot can form. If this clot completely blocks a coronary artery, the part of the heart muscle supplied by that artery is starved of oxygen and begins to die. This event is a myocardial infarction, or heart attack. This case study demonstrates the critical importance of the circulatory system in supplying oxygen to all tissues, and how a blockage in even a small artery can have life-threatening consequences.
Assertion (A): The wall of the left ventricle is thicker than the wall of the right ventricle. Reason (R): The left ventricle has to pump blood to the entire body, while the right ventricle only pumps blood to the lungs.
(a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true but (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.
All arteries carry oxygenated blood and all veins carry deoxygenated blood." Is this statement strictly correct? Justify your answer with specific examples from the human circulatory system.