Blood types

What types of blood exist?

• Type C

• Type D

• Type A

• Type E

Answer explanation

The main blood types are A, B, AB, and O. Type A is one of these recognized blood types, while Type C, D, and E are not standard blood types. Therefore, Type A is the correct answer.

What blood type is the universal donor?

• Type O

• Type B

• Type AB

• Type A

Answer explanation

Type O is considered the universal donor because it lacks A and B antigens on the red blood cells, allowing it to be safely transfused to any blood type without causing an immune reaction.

Why is blood donation important?

• To improve health

• To stop bleeding

• To boost immunity

• To increase oxygen levels

Answer explanation

Blood donation is crucial to stop bleeding in emergencies and surgeries. Donated blood can save lives by providing essential support to patients in need, making it vital for healthcare.

How many blood types are there?

• Six

• Five

• Four

• Three

Answer explanation

There are four main blood types: A, B, AB, and O. Each type can be positive or negative based on the presence of the Rh factor, but the primary classification is based on these four types.

What is plasma?

• Part of white blood cells

• Part of platelets

• Liquid part of blood

• Part of red blood cells

Answer explanation

Plasma is the liquid component of blood, making up about 55% of its volume. It carries cells, nutrients, hormones, and waste products throughout the body, distinguishing it from components like red blood cells, white blood cells, and platelets.

Which blood type is especially important to donate?

• Type A

• Type B

• Type AB

• Type O

Answer explanation

Type O blood is especially important to donate because it is considered the universal donor type, meaning it can be transfused to patients of any blood type in emergencies, making it crucial for blood banks.

What are platelets?

• Cells that help stop bleeding

• Cells that carry oxygen

• Cells that fight infections

• Cells that form plasma

Answer explanation

Platelets are small cell fragments in the blood that play a crucial role in hemostasis, helping to stop bleeding by clumping and forming plugs in blood vessel injuries. This makes 'Cells that help stop bleeding' the correct choice.

What process helps to stop bleeding?

• Formation of platelets

• Formation of red blood cells

• Formation of clots

• Formation of plasma

Answer explanation

The formation of clots is the primary process that helps to stop bleeding. Clots form when platelets and proteins in the blood work together to create a barrier at the site of injury, preventing further blood loss.

What blood type can be a donor for everyone?

• Type A

• Type B

• Type AB

• Type O

Answer explanation

Type O blood is known as the universal donor because it lacks A and B antigens, allowing it to be safely transfused to individuals of any blood type.

What happens if a person loses a lot of blood?

• They become more active

• They feel better

• They may die

• They become stronger

Answer explanation

Losing a lot of blood can lead to severe complications, including shock and organ failure, which may result in death. Therefore, the correct answer is that they may die.