Practice MCQ Questions and answers on Biology-GK

A pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate.

O- is called universal donor.

Blood group O is common, and individuals with this blood type will have both anti-A and anti-B in their serum.

Vena Cava is responsible for carrying impure blood to the human heart.

A person with blood group AB is considered as the universal recipient as it contains both antigens such as A and B but no antibodies in plasma and thus, can accept all the blood type.

Karl Landsteiner discovered blood groups.

For a normal reading, your blood pressure needs to show a top number (systolic pressure) that's between 90 and less than 120 and a bottom number (diastolic pressure) that's between 60 and less than 80.

Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow called hemocytoblasts give rise to all of the formed elements in blood.

The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle. The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.

Plasma cells produce antibodies.