Question

Which of the following is a component of innate immunity?

• A. Antibodies
• B. Memory cells
• C. T lymphocytes
• D. Phagocytes

Hint:

Innate immunity includes: \[ \boxed{ \begin{aligned} &\text{Skin and mucous membranes} &\text{Neutrophils} &\text{Macrophages} &\text{Natural killer (NK) cells} \end{aligned} } \] Adaptive immunity includes B cells, T cells and antibodies.

Answer 1

The Correct Option is D

Step 1: Recall the components of innate immunity. Innate immunity is the body's first line of defense and includes physical barriers and immune cells such as neutrophils and macrophages. These cells remove pathogens by phagocytosis.

Step 2: Identify the innate immune component. Among the given options, \[ \boxed{\text{Phagocytes}} \] belong to the innate immune system. Antibodies, memory cells and T lymphocytes are components of adaptive immunity. Therefore, \[ \boxed{(D)} \] is the correct answer.