Blood Composition Quiz

What is blood composed of?

• Only red blood cells

• Cells floating in a liquid called plasma

• Only white blood cells

• Only platelets

Answer explanation

Blood is composed of cells floating in a liquid called plasma, which includes red blood cells, white blood cells, and platelets.

Which of the following are components of blood?

• Red blood cells and plasma

• White blood cells and platelets

• Red blood cells, white blood cells, and platelets

• Red blood cells and water

Answer explanation

The correct answer is red blood cells, white blood cells, and platelets, as these are the components of blood.

What percentage of blood plasma is water?

• 55%

• 91%

• 45%

• 7%

Answer explanation

91% of blood plasma is water, making it the correct choice.

Which component makes up the largest percentage of formed elements in the blood?

• Platelets

• White Blood Cells

• Red Blood Cells

• Proteins

Answer explanation

Red Blood Cells make up the largest percentage of formed elements in the blood, carrying oxygen and giving blood its red color.

What is the primary function of Red Blood Cells?

• To destroy bacteria

• To help the blood clot

• To transport oxygen

• To reduce bleeding

Answer explanation

The primary function of Red Blood Cells is to transport oxygen, making this the correct choice.

What do White Blood Cells primarily do?

• Transport oxygen

• Help the blood to clot

• Destroy bacteria and foreign particles

• Contain the red pigment haemoglobin

Answer explanation

White Blood Cells primarily destroy bacteria and foreign particles, helping to protect the body from infections and diseases.

What is the role of Platelets in the blood?

• To transport oxygen

• To destroy bacteria

• To contain the red pigment haemoglobin

• To help the blood clot

Answer explanation

Platelets play a crucial role in helping the blood to clot, which is essential for stopping bleeding and promoting wound healing.

What is the primary function of white blood cells in the immune system?

• To carry oxygen to the body's tissues

• To destroy bacteria and foreign particles

• To clot blood

• To produce hormones

Answer explanation

White blood cells' primary function is to destroy bacteria and foreign particles in the immune system.

What are phagocytes responsible for?

• Producing antibodies

• Engulfing bacteria

• Carrying oxygen

• Clotting blood

Answer explanation

Phagocytes are responsible for engulfing bacteria, not for producing antibodies, carrying oxygen, or clotting blood.

What do lymphocytes do?

• Produce antibodies to destroy viruses

• Carry out phagocytosis

• Transport oxygen in the blood

• Regulate body temperature

Answer explanation

Lymphocytes produce antibodies to destroy viruses, making them an essential part of the immune system's response to infections.

Tags

NGSS.MS-LS1-3