Tag: general knowledge

Vishwakarma is the divine architect and engineer of the gods in Hindu mythology, responsible for constructing their cities, weapons, and vehicles. Vibhishana was Ravana's righteous brother, Ravana was the demon king, and Narada is a traveling sage.

Blood plasma is the liquid component of blood in which blood cells (RBCs, WBCs, and platelets) are suspended. It is mostly water and contains proteins, nutrients, hormones, and waste products. Platelets and the various blood cells are the solid components, not the liquid medium.

Hemoglobin is the red pigment in red blood cells that gives blood its characteristic red color. It contains iron and binds oxygen for transport. Plasma is actually pale yellow, platelets are cell fragments, and capillaries are tiny blood vessels - none provide the color.

The heart is the muscular organ that acts as a pump, circulating blood throughout the body via the circulatory system. The brain controls the nervous system, kidneys filter blood, and lungs facilitate gas exchange - none pump blood.

White blood cells (leukocytes) are the immune system's primary defense against infections and foreign invaders. RBCs carry oxygen, platelets help with clotting, and 'none of the above' is incorrect since WBCs do fight disease.

The liver acts as the body's primary filtration system, removing toxins, drugs, and waste products from the blood before it circulates to the rest of the body. While kidneys also filter blood (removing urea for excretion), the liver is the first-pass filter for most harmful substances absorbed from the digestive tract. The heart pumps blood and the intestine absorbs nutrients.

The ABO blood group system classifies human blood into four main types based on the presence or absence of A and B antigens: Type A has A antigens, Type B has B antigens, Type AB has both, and Type O has neither. This classification is crucial for safe blood transfusion, as mixing incompatible blood types can cause dangerous immune reactions.

Diabetes mellitus is a metabolic disorder characterized by persistently elevated blood glucose levels. This occurs when the pancreas produces insufficient insulin or when the body cannot effectively use the insulin it produces, leading to dangerous hyperglycemia if untreated.