Exam 5: Integumentary System

Bob was completely bald on the top of his head by the time he was 35 years of age. Bob noticed he produced abundant sweat on his head when he exercised. He also noticed that his scalp was no longer oily. Which of the following changes account for the observations? (1) He has fewer functional hair follicles now. (2) He has fewer functional sebaceous glands now. (3) He has fewer merocrine sweat glands now. (4) He has fewer apocrine sweat glands now.

The epidermis

Which of the following statements concerning sebaceous glands is false?

Eskimos wear a great deal of clothing and have limited exposure to ultraviolet light, but do not suffer from vitamin D deficiency. A possible explanation is

The portion of a hair that protrudes above the surface of the skin is the ________.

Which type of skin cancer is the most common?

Select the regions that are composed of loose connective tissue. (Check all that apply.)

Keratinization

What will develop when the skin is subjected to excess friction or pressure?

Accutane (Isotretinoin) is a prescriptive drug used to treat severe acne by reducing sebum production. What would be the side effects of decreased sebum production for the integumentary system? (Check all that apply.)

A recent study demonstrated that there are three unique strains of Propionibacterium acnes; two strains are more prevalent in people with acne; however, one of which appears not to be pathogenic to humans and is more prevalent in people with 'clear' skin. Additionally, the strain of P. acnes found in healthy skin kills invading bacteria, including the pathogenic P. acnes. Which of the following statements about the targeted removal of 'bad' P. acnes and addition of 'good' P. acnes is INCORRECT?

A parent of a baby visits the pediatrician because the baby's skin is turning orange. Fortunately, the baby's lab tests indicate no abnormality. What could be causing the orange coloration?

When comparing the dermis with the subcutaneous tissue, the dermis

Thick skin

The vesicles that contain melanin are ________.

The outer surface of the hair is called the ________.

Sweat

-What does structure "B" represent on the diagram?

In which layer of the epidermis are lamellar bodies formed inside keratinocytes?

Which of the following statements concerning vitamin D is false?