The Skin Layer That Functions as a Physical Barrier to Light

Question

The skin layer that functions as a physical barrier to light and heat waves is the stratum ____.​
A) ​germinativum
B) ​spinosum
C) ​corneum
D) ​lucidum

Accepted Answer

The stratum corneum is the outermost layer of the epidermis and functions as a physical barrier to outside elements such as light and heat waves. The stratum germinativum, also known as the stratum basale, is the innermost layer of the epidermis responsible for cell division and growth. The stratum spinosum is the layer of the epidermis responsible for producing keratin, which provides strength and water-resistance to the skin. The stratum lucidum is a translucent layer found only in thick skin, such as the palms and soles of feet.

The skin layer that functions as a physical barrier to light and heat waves is the stratum ____.​

The skin layer that functions as a physical barrier to light and heat waves is the stratum ____.