Which of the following epidermal layers is constantly being shed during your daily activities?

• A. Stratum basale
• B. Stratum corneum
• C. Stratum spinosum
• D. Stratum granulosum

Answer: (B)

Verified step by step guidance

1. Understand the structure of the epidermis, which consists of five layers: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum.
2. Recognize that the stratum corneum is the outermost layer of the epidermis, composed of dead keratinized cells that provide a protective barrier.
3. Learn that the cells in the stratum corneum are constantly being shed and replaced by new cells from the underlying layers, a process known as desquamation.
4. Compare the other layers: the stratum basale is the deepest layer where cell division occurs, the stratum spinosum provides strength and flexibility, and the stratum granulosum is involved in keratinization. None of these layers are directly shed during daily activities.
5. Conclude that the correct answer is the stratum corneum, as it is the layer responsible for shedding dead cells during daily activities like washing or friction.