Worn-out red cells and tiny harmful bacteria are ingested by an immune system agent known as the
A) B lymphocyte.
B) macrophage.
C) telomere.
D) carcinogen.

Question

Quizplus · Accepted Answer

Macrophages are immune system cells that are responsible for ingesting and destroying worn-out red blood cells and harmful bacteria through a process known as phagocytosis. B lymphocytes are also involved in the immune response, but are responsible for producing antibodies rather than directly ingesting cells or bacteria. Telomeres are protective structures at the ends of chromosomes and carcinogens are substances that can cause cancer.

Worn-Out Red Cells and Tiny Harmful Bacteria Are Ingested by an Immune