What are the primary components of leukocytes?

The correct response highlights that neutrophils, eosinophils, and basophils are indeed primary components of leukocytes, also known as white blood cells. These cells play critical roles in the immune system:

• Neutrophils are the most abundant type of white blood cell and serve as the first line of defense during inflammation and infection by phagocytosing pathogens.
• Eosinophils are involved in the response to parasitic infections and play a role in allergic reactions and asthma.
• Basophils, although the least common, release histamine and other chemicals that contribute to the inflammatory response.

Collectively, these cells facilitate various immune functions, responding to infections, inflammation, and immune regulation. The proper function and balance of these leukocytes are vital for maintaining a healthy immune system.

The other answer options do not accurately represent the components of leukocytes, with some referencing cell types that are unrelated to leukocyte classification or function. For example, erythrocytes and platelets are not classified as leukocytes; erythrocytes are red blood cells responsible for oxygen transport, while platelets play a role in blood clotting. Plasma is a component of blood that carries blood cells, nutrients, and hormones, but