Ch. 5 questions

If you cut yourself and bacteria enter the wound, which of the following cells would help get rid of the bacteria? a. Merkel cells b. keratinocytes C. Langerhans cells d. melanocytes

C. Langerhans cells

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

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

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 limiting exposure to the sun

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

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

Squamous cell carcinomas are the second most common of the skin cancers and are capable of metastasizing if not treated. This cancer affects which cells? a. basal cells of the stratum basale b. melanocytes of the stratum basale C. keratinocytes of the stratum spinosum d. Langerhans cells of the stratum lucidum

C. keratinocytes of the stratum spinosum

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

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

As you are walking down the beach, you see a dead, dry, shriveled-up fish. Which layer of your epidermis keeps you from drying out? a. stratum corneum b. stratum basale C. stratum spinosum d. stratum granulosum

a. stratum corneum

Langerhans cells are commonly found in the a. stratum spinosum b. stratum corneum C. stratum granulosum d. stratum basale

a. stratum spinosum

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

Sebaceous glands a. are a type of sweat gland b. are associated with hair follicles c. may function in response to touch d. release a watery solution of salt and metabolic waste

b. are associated with hair follicles

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

Similar to the hair, nails grow continuously throughout our lives. Which of the following is furthest from the nail growth center? a. nail bed b. hyponychium C. nail root d. eponychium

b. hyponychium

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 connective tissue

Collagen lends _________ to the skin. a. elasticity b. structure C. color d. UV protection

b. structure

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

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

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