Correct Option
The correct option is Macrophages and Leukocytes.
Explanation
Cells within the human body exhibit various types of motility, including ciliary, flagellar, and amoeboid movement. Amoeboid movement involves the formation of pseudopodia (false feet) driven by the streaming of protoplasm and the dynamic rearrangement of cytoskeletal elements, specifically microfilaments.Option Analysis:
- Macrophages and Leukocytes Macrophages and Leukocytes: Correct. Specialized immune cells, such as macrophages (tissue phagocytes) and leukocytes (white blood cells like neutrophils), exhibit amoeboid movement. This capability allows them to migrate against the blood flow, squeeze through capillary walls (diapedesis) to reach sites of infection, and engulf pathogens via phagocytosis.
- Erythrocytes Erythrocytes: Incorrect. Erythrocytes (Red Blood Cells) are specialized for oxygen transport. They are non-motile cells that circulate passively with the blood flow and do not possess the machinery for active amoeboid locomotion.
- Neurons Neurons: Incorrect. Neurons are specialized for the transmission of electrochemical signals. While their growth cones exhibit motility during development, mature neurons are stationary within the nervous tissue and do not move like amoebas.
- Hepatocytes Hepatocytes: Incorrect. Hepatocytes are the chief functional cells of the liver. They are stationary cells organized into hepatic plates and do not exhibit amoeboid movement.
Key Takeaway:
In the human body, amoeboid movement is a characteristic feature of immune cells like macrophages and leukocytes. This movement is mediated by the cytoskeleton (microfilaments) and is essential for immune defense mechanisms.