What is cornification?

A. The process of epidermal cells filling with keratin and moving to the surface of the epidermis to form a durable waterproof layer
B. The process of the immune system being alerted by the presence of pathogens
C. The process of skin pigmentation
D. The process of receptors allowing for fine touch


Answer: A

Anatomy & Physiology

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Paula's grandfather has been diagnosed with lung cancer. His physician orders biopsies of several lymph nodes from neighboring regions of the lungs. Paula wonders why the biopsies are necessary. Explain why.

What will be an ideal response?

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Which of the following require a cell to expend energy?

A) simple diffusion and facilitated diffusion C) active transport and endocytosis B) facilitated diffusion and active transport A) osmosis and facilitated diffusion

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Which bone is a part of the skull and not just associated with it?

A) Hyoid B) Incus C) Malleus D) Vomer E) Stapes

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Researchers in a lab are working with a form of stem cells that can divide and give rise to any cell type, allowing them to research development. This cell type is known as

A. totipotent. B. a differentiated cell. C. pluripotent. D. multipotent.

Anatomy & Physiology