In insects, which of the following is analogous to mammalian epithelial tissue, in that it serves as a first line of defense against infection?
A
Lysozymes
B
Hemocytes that engage in phagocytosis
C
The production of chemicals that kill microbes
D
The production of a distinct class of antimicrobial peptides
E
A chitinous exoskeleton
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1
Understand the role of epithelial tissue in mammals: It acts as a physical barrier to protect against pathogens and environmental damage.
Identify the analogous structure in insects: Insects have a chitinous exoskeleton that serves as a protective barrier, similar to how epithelial tissue functions in mammals.
Consider the options provided: Lysozymes, hemocytes, chemical production, antimicrobial peptides, and the chitinous exoskeleton.
Evaluate each option: Lysozymes and antimicrobial peptides are chemical defenses, hemocytes are involved in immune response, and the exoskeleton is a physical barrier.
Conclude that the chitinous exoskeleton is analogous to mammalian epithelial tissue as it provides a first line of defense by acting as a physical barrier.