Chapter 5 MCQs and short answers

15. In humans, exposure of the skin to sunlight is required for ________. a. vitamin D synthesis b. arteriole constriction c. folate production d. thermoregulation

A. vitamin D synthesis

8. Collagen lends ________ to the skin. a. elasticity b. structure c. color d. UV protection

B. Structure

23. After a skin injury, the body initiates a wound-healing response. The first step of this response is the formation of a blood clot to stop bleeding. Which of the following would be the next response? a. increased production of melanin by melanocytes b. increased production of connective tissue c. an increase in Pacinian corpuscles around the wound d. an increased activity in the stratum lucidum

B. increased production of coneective tissue

7. The papillary and reticular layers of the dermis are composed mainly of ________. a. melanocytes b. keratinocytes c. connective tissue d. adipose tissue

C. Connective Tissue

9. Which of the following is not a function of the hypodermis? a. protects underlying organs b. helps maintain body temperature c. source of blood vessels in the epidermis d. a site to long-term energy storage

C. Source of blood vessels in the epidermis

21. Bedsores ________. a. can be treated with topical moisturizers b. can result from deep massages c. are preventable by eliminating pressure points d. are caused by dry skin

C. are preventable by eliminating pressure points

20. In general, skin cancers ________. a. are easily treatable and not a major health concern b. occur due to poor hygiene c. can be reduced by limiting exposure to the sun d. affect only the epidermis

C. can be reduced by limited exposure to the sun

16. One of the functions of the integumentary system is protection. Which of the following does not directly contribute to that function? a. stratum lucidum b. desmosomes c. folic acid synthesis d. Merkel cells

C. folic acid synthesis

The papillary layer of the dermis is most closely associated with which layer of the epidermis? a. stratum spinosum b. stratum corneum c. stratum granulosum d. stratum basale

D. Stratum Basale

22. An individual has spent too much time sun bathing. Not only is his skin painful to touch, but small blisters have appeared in the affected area. This indicates that he has damaged which layers of his skin? a. epidermis only b. hypodermis only c. epidermis and hypodermis d. epidermis and dermis

D. epidermis and dermis

17. An individual using a sharp knife notices a small amount of blood where he just cut himself. Which of the following layers of skin did he have to cut into in order to bleed? a. stratum corneum b. stratum basale c. papillary dermis d. stratum granulosum

c. Papillary dermis

11. The hair matrix contains ________. a. the hair follicle b. the hair shaft c. the glassy membrane d. a layer of basal cells

d. a layer of basal cells

12. Eccrine sweat glands ________. a. are present on hair b. are present in the skin throughout the body and produce watery sweat c. produce sebum d. act as a moisturizer

B. are present in the skin throughout the body and produce watery sweat

10. In response to stimuli from the sympathetic nervous system, the arrector pili ________. a. are glands on the skin surface b. can lead to excessive sweating c. are responsible for goose bumps d. secrete sebum

c. are responsible for goose bumps