University of Phoenix Material Integumentary System Lab – Week Five Introduction The integumentary system consists of skin, hair, nails, and nerves. As you learn about the various diseases that affect the integum

University of Phoenix Material

Integumentary System Lab – Week Five


The integumentary system consists of skin, hair, nails, and nerves. As you learn about the various diseases that affect the integumentary system, it is important for you to understand the structures that can be affected by disease. Complete this lab to become familiar with a healthy system and to identify diseases related to the skin.

PART ONE: basic functions

Provide brief answers to the following questions to help you get acquainted with the basic functions of a healthy integumentary system. Refer to Ch. 19 in Microbiology: Principles and Explorations.

1. How does the integumentary system prevent disease?

2. How do sweat, sebaceous (oil), and mucus secretions help prevent disease?

3. Which types of bacteria are considered normal skin microflora?

4. Suppose a sample of bacteria was taken from your skin. If you were to perform a Gram stain on the sample, what is the likely Gram reaction – positive or negative? Explain your answer.

PART two: basic structures

Identify the selected integumentary system structures in the following diagram:

PART three: investigate and apply

Access the Public Diseases & Conditions A-Z Index on the Centers for Disease Control and Prevention website at Research one microbe-related skin disease (excluding sexually transmitted diseases) and complete the following activity.

Read the information on the CDC site and provide a brief, one- to two-paragraph summary of the skin condition. Include the following in your description:

· The skin condition

· The microbe causing the condition

· Which structures of the integumentary system are affected—Use one or more structures included in Part Two.

· Who is at risk

· How serious the disease is

[Type your paragraph in the space below]

SCI250 Week 5 Chapter 19 Integumentary System Quiz – Test Bank

Section: Multiple Choice

1. The majority of the microorganisms on the surface of the human skin are ________

Gram-positive bacteria.

Gram-negative bacteria.

approximately equal numbers of Gram-positive and Gram-negative bacteria.

Spore-forming bacteria.


2. The outer layer of the skin is the _________ while the deeper layer is the _________

cutaneous, keratin.

dermis, sebum.

mucous, epidermis.

epidermis, dermis.

sebum, keratin.

3. A massive lesion caused by the spread of Staphylococcus aureus infection (often on the neck and upper back) is called a ________






4. Scalded skin syndrome is caused by exotoxins (exfoliatins) produced by ________

Streptococcus pyogenes.

Staphylococcus aureus.

Propionibacterium acnes.

Pseudomonas aeruginosa.

Demodex folliculorum.

5. Which of the following microorganisms causes scarlet fever?

Staphylococcus aureus

Propionibacterium acnes

Pseudomonas aeruginosa

Demodex folliculorum

Streptococcus pyogenes

6. The pus-producing skin infection (pyoderma) can be caused by ________




a combination of staphylococci, streptococci, and corynebacteria.

All of the above

7. Which of the following is NOT a characteristic of impetigo?

It is common in children.

It can be caused by Staphylococcus aureus.

It can be caused by Streptococcus pyogenes.

It is highly contagious.

It can be caused by pseudomonads.

8. What bacteria can multiply in blocked skin pores, metabolize sebum, and lead to the development of acne?

Pseudomonas aeruginosa


Serratia marcescens

Streptococcus pyogenes

Acne is not caused by a bacterial infection.

9. Burn patients often develop a nosocomial infection caused by ________

Streptococcus epidermis

Staphylococcus aureus

Pseudomonas aeruginosa


Candida albicans

10. Koplik’s spots develop during infection with ________

rubella virus.

Staphylococcus aureus.

Streptococcus pyogenes.

Varicella-zoster virus.

measles virus.

11. Inflammation of the eye conjunctiva (bacterial conjunctivitis) can be caused by _______

Staphylococcus aureus

Streptococcus pneumoniae

Neisseria gonorrhoeae

Pseudomonas aeruginosa

All of the above

12. Gas gangrene is most likely associated with infection with _______

Staphylococcus aureus.

Clostridium perfringenes.

Streptococcus pneumoniae.

Neisseria gonorrhoeae.

Pseudomonas aeruginosa.

13. Hyperbaric oxygen may be useful in treating infections caused by _______

Gram-positive bacteria.

Gram-negative bacteria.

anaerobic bacteria.



14. What is the leading cause of preventable blindness in the world?

Chlamydia trachomatis

Haemophilus influenzae

Neisseria gonorrhoeae

Staphylococcus aureus

Streptococcus pneumoniae

15. The disease shingles is caused by the same virus that causes ________



German measles.



16. When is antibiotic used to treat the eyes of newborn infants?

The mother has gonorrhea.

The mother has genital herpes.

Neisseria gonorrhoeae is isolated from the newborn’s eyes.

Antibiotic is always used.

The mother has a history of multiple sex partners.

17. The virus used to immunize individuals against smallpox causes ________




molluscum contagiosum.


18. Human papillomavirus causes ________



molluscum contagiosum.



19. Tumorlike, light pink painless growths on the skin are probably the result of infection with ________


molluscum contagiosum virus.

measles virus.

Human papillomavirus.

Epidermophyton floccosum.

20. Ringworm infection caused by Tinea can cause infections of the ________




beard area.

All of the above

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