Textbook Question
Which of the following is a chemical defense found in tears? Select all that apply.
a. Water
b. Lysozyme
c. Antimicrobial peptides
d. Neutrophils
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19. Innate Immunity
First-Line Defenses: Chemical Barriers
Struggling with Microbiology?
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The ____________ glands create sebum which makes the skin more __________ which decreases microbial growth.
A
Lacrimal glands; basic.
B
Salivary glands; hydrophobic.
C
Sweat glands; alkaline.
D
Sebaceous glands; acidic.
Verified step by step guidance1
Identify the function of sebaceous glands in the skin. Sebaceous glands are responsible for producing sebum, an oily substance.
Understand the role of sebum in skin health. Sebum helps to lubricate and protect the skin, making it more acidic.
Explore the impact of skin acidity on microbial growth. An acidic environment on the skin can inhibit the growth of many microorganisms, reducing the risk of infections.
Compare the options given in the problem. Lacrimal glands produce tears, salivary glands produce saliva, and sweat glands produce sweat, none of which are responsible for creating sebum.
Conclude that sebaceous glands are the correct answer as they produce sebum, which makes the skin more acidic, thereby decreasing microbial growth.
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