The school nurse is approached by an 8-year-old student. The student says that he learned in science class that the outer layer of the skin is dead cells
The student wants to know which of his cells is going to die so they can be covered with skin. What would be the nurse's best response?
A) "All cells die and the body replaces most of them. The cells thought to form the barrier of the outer layer of the skin are called keratin cells."
B) "All cells die and the body replaces most of them. The cells thought to form the barrier of the outer layer of the skin are called melanocytes."
C) "All cells die and the body replaces most of them. The cells thought to form the barrier of the outer layer of the skin are called Merkel cells."
D) "All cells die and the body replaces most of them. The cells thought to form the barrier of the outer layer of the skin are called Langerhans' cells."
Ans: A
Feedback: Dead cells of the epidermis contain keratin, an insoluble, fibrous protein that forms the outer barrier of the skin. Melanocytes are primarily involved in producing the pigment melanin. Merkel cells are the receptors that transmit stimuli to the axon through a chemical synapse. Langerhans cells are believed to play a significant role in cutaneous immune system reactions.
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