Body's Guardians: Defense Mechanisms and Phagocytosis

What is the primary role of the body's innate immune system?

• To produce antibodies

• To provide immediate defense against infection

• To remember past infections for future protection

• To produce red blood cells

Which type of white blood cell is primarily responsible for phagocytosis?

• Lymphocytes

• Eosinophils

• Neutrophils

• Basophils

What is the term for the process of engulfing and digesting pathogens?

• Endocytosis

• Exocytosis

• Phagocytosis

• Pinocytosis

Which of the following is NOT a physical barrier in the body's defense system?

• Skin

• Mucous membranes

• Stomach acid

• Antibodies

What is the name of the protein that can puncture the cell walls of bacteria, aiding in immune defense?

• Hemoglobin

• Insulin

• Lysozyme

• Defensin

Which of the following is a chemical barrier in the body's defense system?

• Saliva

• Tears

• Gastric juice

• All of the above

What type of immunity is developed after the body is exposed to a pathogen and responds by producing specific antibodies?

• Innate immunity

• Passive immunity

• Adaptive immunity

• Cellular immunity

What is the role of the complement system in the immune response?

• To produce hormones

• To regulate body temperature

• To enhance the ability of antibodies and phagocytic cells to clear microbes

• To transport oxygen to tissues

During phagocytosis, the engulfed particle is enclosed within a vesicle known as a:

• Lysosome

• Phagosome

• Ribosome

• Endosome

What is the term for the programmed death of cells as a mechanism to remove infected or damaged cells?

• Necrosis

• Apoptosis

• Autophagy

• Anaplasia