anatomy lecture quiz 4
The most superficial layer of skin that has vasculature is the:
A- Epidermis B- Papillary layer C- Hypodermis D- Reticular layer B is correct
Which of the following statements about hair are true:
A- Hair color is derived from carotene. B- All hairs have a cortex, medulla, and cuticle. C- Hair depends on sweat to maintain structural integrity. D- Hair shaft is living tissue. E- All of the statements listed are false. E is correct
In the figure above letter "___" is the Tactile Corpuscle and letter "___" is the Papillary Layer.
A- I; C B- N; B C- N; C D- I; B D is correct
Select the correct identity and function of the cell marked "A" in the figure above.
A- Melanocyte that produces carotene based on genetic control and exposure to UV radiation. B- Melanocyte that produces melanin based on genetic control and exposure to UV radiation. C- Melanocyte that produces melanin based solely on exposure to UV radiation. D- Langerhans cell that extends its cytoplasm to phagocytize sick or foreign cells. E- Keratinocyte that fills with keratin and melanin; once this cell dies it forms the bulk of the epidermis. B is correct
Nails provide protection to the tips of the _______ phalanges. Humans use deodorant to the mask the smells generated by their _______ glands.
A- Proximal; Eccrine B- Proximal; Apocrine C- Distal; Eccrine D- Distal; Apocrine D is correct
Which of the following statements about sebaceous glands is false?
A- Sebaceous glands are only found in association with hair follicles. B- Blocked sebaceous glands can cause acne. C- Sebaceous glands use the holocrine secretion method for producing product. D- Sebum is a lipid mixture helps to maintain the epidermis and hair. E- Sebaceous glands are absent from the soles of feet and palms of hands. A is correct
Which of the following options correctly orders the layers of epidermis in thin skin from superficial to deep?
A- Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale B- Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum C- Stratum corneum, stratum granulosum, stratum spinosum, stratum basale D- Stratum basale, stratum spinosum, stratum granulosum, stratum corneum C is correct
Which of the following is false:
A- The thickness of the epidermis on the soles and palms prevent their tanning. B- Exposure to extensive UV radiation can damage fibrocytes which will cause premature wrinkling. C- Hair plays a role in protecting skin from UV damage. D- An increase in UV exposure will stimulate the melanocytes to produce more carotene pigment. E- Exposure to extensive UV radiation can cause skin cancer. D is correct
The most superficial layer of the epidermis where cells still possess nuclei is the:
A- stratum granulosum B- stratum spinosum C- stratum lucidum D- stratum corneum E- stratum basale A is correct
