Topic 4 Part 1: Integumentary System

The following are the 3 layers of the integumentary system EXCEPT

• Epidermis
• Dermis
• Hypodermis
• Endodermis

Dermal papillae

• connect the dermis to the hypodermis.

• are found in the papillary layer of the dermis.

• are found in the reticular layer of the dermis.

• are composed of dense irregular connective tissue.

Melanocytes

• secrete milk

• are primarily found within the reticular layer of the dermis

• play a role in immunity

• are primarily found within the stratum basale

The reticular layer of the dermis is primarily composed of

• adipose connective tissue.

• dense irregular connective tissue.

• areolar connective tissue.

• dense regular connective tissue

Going from deep to superficial, which of the following is the correct order of the layers (stratum) of the epidermis?

• basale, spinosum, granulosum, lucidum, corneum

• basale, granulosum, spinosum, lucidum, corneum

• corneum, lucidum, granulosum, spinosum, basale

• basale, lucidum, granulosum, spinosum, corneum

• corneum, basale, spinosum, lucidum, granulosum

As cells move to the more superficial layers of the epidermis

• they get closer to the hypodermis.

• the amount of keratin they contain increases.

• their metabolism increases

• they take on a more cuboidal shape

• they produce more melanin

The stratum basale is also referred to as the:

• stratum granulosum

• stratum spinosum

• stratum germinativum

• stratum of lopes

The speed of keratinization is mostly determined by

• hormones and BMI

• an individual's age and damage / stressors to the skin

• exercise, sleep, and stress levels
• diet, weather, and lifestyle

The dermis is made up of the following two layers:

• hypodermal layer and subepidermal layer
• epidermal layer and subcutaneous layer
• superficial layer and deep layer
• papillary layer and reticular layer

Two types of melanin include:

• eumelanin and pheomelanin
• melanin A and melanin B
• dark melanin and light melanin
• black melanin and red melanin