Which cell type in the epidermis produces a pigment that absorbs ultraviolet light?

a. keratinocyte
b. melanocyte
c. Langerhans cell
d. Granstein cell
e. sebaceous cell


B

Anatomy & Physiology

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Anatomy & Physiology

The major regulator of respiration is the plasma concentration of ________.

A. carbon dioxide B. water vapor C. nitrogen D. oxygen E. chloride

Anatomy & Physiology

Your book refers to the process of diffusion and mentions that both chemical and electrical gradients may influence this process. Explain why Na+ would be influenced by both chemical and electrical gradients, but glucose would not

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Anatomy & Physiology

How do iguanas maintain water and ion balance?

A) Marine iguanas produce urine that contains a higher ion concentration than blood. B) A specialized salt gland in their nose produces a highly concentrated salt solution that is expelled. C) Marine iguanas use their kidneys to excrete excess salt. D) Marine iguanas need to drink fresh water on land to maintain the optimal water and ion balance.

Anatomy & Physiology