Practice questions on how the circulatory system is regulated and common disorders affecting it. Helps students prepare for exams with practical examples.
Thrombocytopenia is a condition where platelet count is low, leading to excessive bleeding.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Normal hemoglobin levels range from 12-16 g/dL in a healthy individual.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Leukemia is a cancer of white blood cells, leading to their excessive production.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Hypertension can damage arteries, increasing the risk of heart disease and stroke.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Congestive heart failure occurs when the left ventricle fails to pump blood effectively, leading to fluid buildup in the lungs.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Atherosclerosis occurs due to cholesterol buildup, narrowing the arteries and restricting blood flow.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Polycythemia is characterized by an abnormally high number of red blood cells, increasing blood viscosity.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
The sinoatrial (SA) node is located in the right atrial wall near the opening of the superior vena cava. It generates rhythmic electrical impulses and acts as the natural pacemaker of the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Peripheral resistance is the opposition to blood flow within blood vessels, influencing blood pressure.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Heart failure occurs when the heart is unable to pump blood effectively to meet the body's needs.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Veins have valves that prevent backflow and ensure unidirectional blood flow toward the heart.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
Hemophilia is a genetic disorder in which blood clotting factors are deficient, leading to excessive bleeding.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Regulation and Disorders of Circulatory System
