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自然科學
高中一至三年級
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1
Which of the following is NOT a primary function of the integumentary system?
A
Protection against mechanical injury and pathogens
B
Production of red blood cells
C
Regulation of body temperature through sweating and vasodilation
D
Synthesis of vitamin D when exposed to sunlight
2
A patient has a condition that reduces the number of melanocytes in the epidermis. What is the most likely consequence?
A
Decreased ability to produce vitamin D
B
Increased sensitivity to UV radiation and reduced skin pigmentation
C
Excessive sweating and poor temperature regulation
D
Increased susceptibility to skin infections
3
Which layer of the skin contains blood vessels, nerve endings, and glands?
A
Hypodermis
B
Dermis
C
Stratum corneum
D
Epidermis
4
During a severe burn, a patient loses a significant portion of their skin. Which of the following would be the most immediate concern?
A
Loss of vitamin D synthesis leading to bone weakness
B
Excessive hair growth in the affected area
C
Inability to produce melanin leading to albinism
D
Dehydration and infection due to loss of barrier function
5
Which of the following best explains why the integumentary system is considered a key component of the immune system?
A
It regulates body temperature, creating an environment hostile to pathogens.
B
It produces antibodies that neutralize pathogens.
C
It contains Langerhans cells that phagocytose pathogens and present antigens.
D
It synthesizes vitamin D, which directly kills bacteria.