Question

question 5

the epidermis is:

keratinized cutaneous membrane.
keratinized mucous membrane.
nonkeratinized cutaneous membrane.
nonkeratinized mucous membrane.

question 6

what structure stands hairs on end, causing piloerection?

dermal papillae
arrector pili muscle
epithelial root sheath
epidermal ridges

Explanation:

Analyze Question 5

The question asks to classify the epidermis. The epidermis is the outermost layer of the skin, which is a cutaneous membrane (dry membrane exposed to air). Histologically, the epidermis consists of keratinized stratified squamous epithelium. Therefore, it is a keratinized cutaneous membrane. This relates to our understanding of Epidermal Layers and tissue classification.

Analyze Question 6

The question asks which structure stands hairs on end, causing piloerection (goosebumps). Piloerection is caused by the contraction of tiny smooth muscle bundles attached to hair follicles. These muscles are called arrector pili muscles.

Answer:

Question 5

• keratinized cutaneous membrane. (Correct answer)
• keratinized mucous membrane.
• nonkeratinized cutaneous membrane.
• nonkeratinized mucous membrane.

Question 6

• dermal papillae
• arrector pili muscle (Correct answer)
• epithelial root sheath
• epidermal ridges