Question

1. the main components of blood are:

a. platelets, red blood cells, plasma, white blood cells
b. proteins, plasma, neutrophils
c. white blood cells, red blood cells, oxygen
d. red blood cells, platelets

Explanation:

To determine the main components of blood, we recall that blood is composed of plasma (the liquid part) and formed elements (cells and cell fragments). The formed elements include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).

• Option a lists platelets, red blood cells, plasma, and white blood cells, which are all main components.
• Option b includes proteins (a component of plasma, not a main component category), plasma, and neutrophils (a type of white blood cell, not a main component category).
• Option c includes white blood cells, red blood cells, and oxygen (oxygen is transported by blood, not a main component of blood itself).
• Option d only lists red blood cells and platelets, missing plasma and white blood cells.

Answer:

a. Platelets, red blood cells, plasma, white blood cells