Textbook Question
Phagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process known as
(a) Diapedesis
(b) Chemotaxis
(c) Adhesion
(d) Perforation
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21. The Immune System
Phagocytosis
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Which of the following statements concerning phagocytosis is true?
A
Phagocytosis is primarily involved in the transport of small ions across the cell membrane.
B
Phagocytosis is a form of passive transport that does not require energy.
C
Phagocytosis is a process where cells engulf large particles or microorganisms.
D
Phagocytosis occurs exclusively in plant cells.
Verified step by step guidance1
Understand the definition of phagocytosis: Phagocytosis is a cellular process where cells, often immune cells like macrophages, engulf and digest large particles, bacteria, or other microorganisms.
Identify the nature of phagocytosis: It is an active transport mechanism, meaning it requires energy in the form of ATP to occur, as the cell membrane engulfs the particles.
Recognize the types of cells involved: Phagocytosis primarily occurs in certain animal cells, particularly in the immune system, and is not exclusive to plant cells.
Differentiate from other transport mechanisms: Unlike phagocytosis, the transport of small ions across the cell membrane typically involves ion channels or pumps, which can be passive or active, but not phagocytosis.
Evaluate the statements: Based on the understanding of phagocytosis, identify the correct statement as the one describing it as a process where cells engulf large particles or microorganisms.
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